Abstract

Dengue is no longer a rare or imported event in Sub-Saharan Africa. Recent data from the WHO African Region show hundreds of thousands of suspected cases and hundreds of deaths across multiple countries, with single-country outbreaks driving the majority of the burden.[1][2] Yet most national surveillance systems still treat dengue as a marginal threat, and laboratory networks are not configured to detect or track it at scale.

This brief argues that the region is structurally under-prepared for dengue's trajectory. The core problem is not just a lack of rapid diagnostic tests; it is the absence of an integrated architecture that ties together clinical suspicion, tiered laboratory confirmation, entomological surveillance, and cross-border information flows. The piece outlines priority investments for funders and policymakers to close this gap over the next 3 to 5 years, before dengue outbreaks become a normalized and unremarkable seasonal reality.

1. Dengue is no longer an outlier event in the African Region

For years, dengue in Africa was framed as sporadic, under-detected, and largely secondary to malaria. That framing is now untenable.

The WHO African Region reported roughly 172,000 suspected dengue cases in 2023, including more than 70,000 confirmed and probable cases and over 700 deaths across 15 countries.[1] Burkina Faso alone accounted for the majority of these numbers, around 85% of reported cases and more than 90% of deaths, highlighting how quickly a single national outbreak can dominate the regional profile.[1][2]

Three structural features of this trend are important for system design:

• The burden is likely still underestimated. Multiple studies and WHO assessments point to limited availability of confirmatory diagnostics, inconsistent case definitions in practice, and low clinical suspicion in malaria-endemic settings where febrile illness is routinely attributed to malaria.[3][4]
• Transmission is expanding beyond historically recognized hotspots. Evidence of outbreaks in Sahelian and coastal West African countries, alongside case reports in East Africa, suggests that Aedes-borne transmission is likely far more widespread than routine reporting indicates.[1][2]
• Climate and urbanization trends are moving in dengue's favor. Rapid urban growth, inadequate water and waste management, and climate-driven changes in rainfall and temperature patterns are cumulatively expanding suitable habitat for Aedes vectors.

If African systems continue to treat dengue as a marginal or imported concern, surveillance and diagnostics architectures will be persistently misaligned with actual and emerging risk.

Sample sentinel network: urban sentinel sites and regional surge hubs (Burkina Faso, Tanzania examples).

2. Why current diagnostics and surveillance are structurally misaligned

Most African countries do not have dengue-specific surveillance programs. Instead, dengue is often folded into generic febrile illness or other arboviral categories.

Integrated dengue surveillance: clinics feed labs and entomology; regional platform aggregates for surge support.

2.1 Fragmented and shallow diagnostic capacity

A recent assessment of epidemic-prone disease testing capacity in African public health laboratories highlighted cross-cutting issues: limited availability of appropriate diagnostic technologies, challenges in establishing and maintaining testing capacity, and gaps in quality systems.[4] Dengue is a clear casualty of these constraints.

Common failure modes include:

• Narrow and fragile access to tests. Rapid diagnostic tests and ELISA-based assays for dengue are often only available in a small number of national or reference laboratories, with limited or no access at regional or district levels.
• Over-reliance on ad hoc external support. During outbreaks, reagents and RDTs may be mobilized through partner support or emergency shipments, but this does not translate into sustained capacity.[3]
• Weak integration into routine algorithms. Clinical pathways for non-malarial febrile illness rarely include dengue testing as a structured step, leading to missed cases and biased surveillance data.

2.2 Limited entomological and environmental intelligence

Dengue surveillance cannot rely on human cases alone. Yet entomological surveillance, tracking Aedes populations, breeding sites, and insecticide resistance, is chronically under-resourced. WHO reports for the African Region note shortages of trained entomologists and vector control specialists, as well as limited capacity to design and execute systematic surveillance.[3]

Without a minimal entomological backbone, countries are effectively blind to changing Aedes ecology until outbreaks are already underway.

2.3 Siloed information systems and weak cross-border visibility

Even where diagnostics and entomological data exist, they are rarely integrated. Routine surveillance systems may capture suspected cases, while lab information systems and entomology teams maintain separate datasets. Regional visibility is similarly fragmented; cross-border data sharing is often slow, informal, or dependent on partner-mediated channels.

The result is an architecture that cannot answer basic strategic questions in real time:

• Where is dengue transmission intensifying right now?
• Which geographies are seeing early signals of Aedes expansion?
• Which facilities are persistently under-testing or under-reporting?

3. What a fit-for-purpose dengue surveillance architecture would look like

Closing the gap does not require building entirely new systems from scratch. Countries can layer dengue-specific capabilities onto existing Integrated Disease Surveillance and Response (IDSR) and laboratory networks.

A fit-for-purpose architecture in Sub-Saharan Africa would include at least four linked components:

Tiered diagnostics network: peripheral RDTs → regional ELISA/PCR → national reference confirmation.

3.1 Tiered diagnostic networks with clear testing roles

• Peripheral level (primary care and district hospitals): Capacity to recognize dengue-compatible syndromes and use RDTs in defined scenarios, such as non-malarial febrile illness with specific clinical or epidemiological risk factors.
• Intermediate or regional laboratories: Ability to perform ELISA-based serology and, where feasible, PCR confirmation for a subset of cases, including severe disease and atypical presentations.
• National reference laboratories: Capacity to confirm outbreaks, support quality assurance, perform more advanced testing (e.g., serotyping, sequencing through regional collaborations), and coordinate reagent supply planning.

Funders should not just pay for test kits. They should invest in stable reagent pipelines, quality management, and data integration across tiers.

3.2 Minimal but continuous entomological surveillance

Countries do not need exhaustive vector mapping everywhere. A minimal viable backbone can include:

• Sentinel sites in high-density urban and peri-urban areas to track Aedes indices and insecticide resistance trends.
• Periodic, standardized surveys around outbreak-affected districts to understand local drivers and inform vector control strategies.
• Regional technical support to design protocols and analyze data, leveraging limited entomology expertise more efficiently.

WHO and partners have already deployed entomologists to priority countries to strengthen surveillance; the challenge is making this support routine, not exceptional.[3]

3.3 Integrated risk assessment frameworks

Work in countries such as Tanzania shows that structured dengue rapid risk assessment approaches are feasible even when diagnostic capacity and exposure data are incomplete.[5] These frameworks combine syndromic and laboratory data (where available), entomological and environmental indicators, and contextual information on health system capacity.

Institutionalizing these tools inside ministries and national institutes, rather than keeping them as one-off partner exercises, would materially improve how countries prioritize surveillance and response resources.

3.4 Regional platforms for data sharing and surge support

Given the speed with which dengue can move across borders, no country's architecture is sufficient in isolation. Practical regional priorities include:

• Agreed regional minimum reporting standards for dengue indicators.
• Mechanisms for rapid deployment of technical teams (epidemiology, entomology, laboratory) across borders during surges.
• Shared procurement and stockpiling strategies for diagnostics and key supplies, building on existing hubs in East and West Africa.[3]

4. Implications for funders and policymakers in 2026

For funders and policymakers in 2026, the question is not whether dengue is important enough to merit attention. The data already answer that. The question is whether systems will normalize repeat outbreaks as the new normal, or whether this window is used to re-architect surveillance and diagnostics.

If these architectural moves are made in the next 3 to 5 years, the region can avoid a future in which dengue becomes another entrenched, under-measured burden on overstretched health systems.

One-page funder brief summarizing recommendations and illustrative funding scales.

[Download the Priority Investment Brief (PDF)]

Implementation recommendations

• Reclassify dengue as a routine, not exceptional, surveillance target. Integrate dengue into IDSR indicator sets, case definitions, and analytic products, with explicit attention to non-malarial febrile illness.
• Finance tiered diagnostic capacity with predictable operating budgets. Move beyond project-based kit donations toward multi-year financing for reagents, equipment maintenance, and training across network tiers.
• Underwrite entomological backbone functions. Fund a small but continuous entomological surveillance program rather than sporadic campaigns, and connect outputs directly to national decision-making.
• Invest in integrated data systems and analytics. Link laboratory information systems, routine surveillance, and entomology datasets into shared analytic pipelines and dashboards that answer dengue-specific questions.
• Tie dengue architecture to broader biosecurity and climate resilience agendas. Position investments as dual-benefit capacities that also strengthen preparedness for other arboviruses and climate-sensitive vector-borne diseases.

References

1. WHO Regional Office for Africa. Dengue in the WHO African Region: Situation Report 01 (19 December 2023). Available from: https://www.afro.who.int/fr/node/18709. [1]
2. World Health Organization. Disease Outbreak News: Dengue - Global situation (30 May 2024). Available from: https://www.who.int/emergencies/disease-outbreak-news/item/2024-DON518. [2]
3. WHO Regional Office for Africa. Report of the Regional Director: The work of WHO in the African Region, July 2023 to June 2024. Available from: https://www.afro.who.int/publications/report-regional-director-work-world-health-organization-african-region-july-2023-june. [3]
4. Ashenafi A, et al. Diagnostics for detection and surveillance of priority epidemic-prone diseases in Africa: an assessment of testing capacity and laboratory strengthening needs. Available from: https://pubmed.ncbi.nlm.nih.gov/39360262/. [4]
5. Belau MH, et al. Integrated rapid risk assessment for dengue fever in settings with limited diagnostic capacity and uncertain exposure: Development of a methodological framework for Tanzania. Available from: https://pubmed.ncbi.nlm.nih.gov/40153405/. [5]
6. World Health Organization. Global strategic preparedness, readiness and response plan for dengue and other Aedes-borne arboviruses (September 2024 to September 2025). Available from: https://www.who.int/publications/m/item/global-strategic-preparedness--readiness-and-response-plan-for-dengue-and-other-aedes-borne-arboviruses. [6]

Key surveillance & blood-safety targets funders can use to judge pilots and scale.

Abstract

Biovector's Tier 2 dengue brief argues that Sub-Saharan Africa is structurally under-prepared for dengue because surveillance, diagnostics, and entomology architectures lag behind the epidemiology.[1] In parallel, WHO AFRO estimates that almost all blood units in the region are screened for HIV and hepatitis B, with slightly lower coverage for hepatitis C and syphilis, but no routine screening for dengue, Zika, chikungunya, or other Aedes-borne arboviruses.[2]

This Rapid Insight Note makes a narrow argument: even as countries upgrade dengue-ready surveillance and diagnostics, blood systems risk remaining a parallel, weakly integrated layer of biosecurity architecture. Drawing on recent WHO guidance and African blood safety data,[2] the note outlines why this blind spot matters, and what funders and policymakers can do in the next 3 years to bring blood safety into the Aedes-borne conversation without over-engineering the system.

1. How African blood systems are configured today

Across the WHO African Region, policy is clear on the minimum panel for transfusion-transmissible infections (TTIs): all blood units should be screened for HIV, HBV, HCV, and syphilis.[2] In practice, WHO reports that:

• In 2022, most collected units were screened for HIV and HBV, with slightly lower but still high coverage for HCV and syphilis.[2]
• Only around two-thirds of countries participated in external quality assessment schemes for TTI testing, pointing to uneven quality management and supervision.[2]

These numbers reflect real progress compared with a decade ago. But they also reveal how narrowly optimized African blood systems are: architectures, quality systems, and procurement are all tuned to a small set of chronic viral risks.

The 2026 regional framework for blood products recognizes the pressure from emerging infections, including arboviruses, and calls for stronger surveillance, better quality management, and more resilient supply chains.[3] Yet in most countries, this recognition has not yet translated into concrete design decisions about Aedes-borne arboviruses:

• Arboviral outbreaks (dengue, yellow fever, chikungunya, Zika) are often treated as separate vertical events handled by surveillance and outbreak teams, not as triggers for blood system reconfiguration.
• Risk assessments for new arboviruses rarely include a specific transfusion-transmitted infection (TTI) workstream, except in high-profile crises such as Zika in the Americas.[5]

The result is that transfusion services sit at the periphery of arboviral preparedness: covered indirectly by general infection-control language, but not architected as an active sensor or control layer for Aedes-borne risk.

Key surveillance & diagnostics indicators (targets, illustrative).Blood screening architecture is optimized for classic TTIs; arboviruses remain outside routine panels.

2. Aedes-borne arboviruses are no longer hypothetical for African blood systems

The canonical question for transfusion safety is simple: Is there credible risk that a pathogen can be present in the donor population at the time of donation, survive processing, and cause disease in recipients?

For Aedes-borne arboviruses, the global evidence base already answers "yes":

• Zika virus was confirmed as a transfusion-transmitted infection in multiple settings, prompting WHO to issue detailed guidance on maintaining a safe and adequate blood supply during Zika outbreaks (donor deferral, targeted screening, and pathogen-reduction strategies).[5]
• Dengue viremia in asymptomatic or mildly symptomatic donors has been documented, and transfusion-transmitted dengue has been reported in several countries outside Africa.[4,5]

African contexts add two important layers:

• Demonstrated circulation and expansion of Aedes-borne viruses. Dengue outbreaks across West and East Africa, detection of dengue virus serotype 3 in Angola,[6] and serologic evidence of multiple arboviruses circulating in Burkina Faso[7] point to a real and growing pool of potential donors with recent infection.
• High structural reliance on transfusion. Because of malaria-related anemia, obstetric hemorrhage, and trauma, many African facilities are structurally dependent on transfusion to prevent mortality, which magnifies the consequences of any TTI blind spots.[2,3]

Illustrative map: documented arboviral activity and priority urban centers where blood-system pilots are recommended.

In other words, the ingredients for transfusion-transmitted Aedes-borne infections exist in Sub-Saharan Africa today. The absence of documented large-scale events may reflect limited detection and attribution rather than low risk.

Integrating blood services into dengue & arboviral surveillance: data and decision flows.

3. Where the architecture is misaligned

The blind spot is not simply "no dengue test for blood donors." It is architectural.

3.1 Surveillance and blood systems are only loosely coupled

Current WHO strategic plans for dengue and other Aedes-borne viruses emphasize integrated surveillance, tiered diagnostics, and rapid risk assessment.[4] Yet the data streams that inform those risk assessments (IDSR, lab confirmation, entomology) are rarely linked to blood service decision-making in a systematic way.

Typical failure modes include:

• Outbreak alerts that trigger vector control and clinical preparedness, but not any structured review of donor-deferral policies or TTI risk communication.
• Blood services receiving outbreak information in ad hoc ways (emails, media reports, informal calls), with no pre-defined thresholds for adjusting donor selection criteria or inventory strategies.

This means blood systems are not positioned as active consumers and generators of arboviral intelligence, even though they draw from the same at-risk population.

3.2 Risk frameworks default to "all or nothing" screening

The experience with Zika led some high-income systems to rapidly adopt nucleic acid testing or pathogen-reduction technologies for platelets and plasma.[5] For most African services, those options are not financially or operationally realistic.

Without alternative design patterns, the perceived choice becomes binary:

• Maintain the standard TTI panel and accept that Aedes-borne arboviruses are unaddressed; or
• Add new assays and technologies that the system cannot realistically sustain.

The absence of graded, architecture-level responses (for example, time-limited donor deferral policies in specific geographies, or targeted testing when outbreak indicators cross pre-agreed thresholds) is what keeps Aedes-borne risk conceptually outside the blood system.

3.3 Quality and data flows are not configured for emerging signals

Quality management systems in many African blood services still struggle to consistently implement and document basic external quality assessment participation for the core TTI panel.[2] Asking those same systems to suddenly take on more dynamic, emerging-pathogen risk management without redesign is unrealistic.

Moreover:

• Data on donor demographics, collection sites, and TTI screening results are often siloed from national surveillance and analytic teams.
• Arboviral surveillance outputs (case counts, serotype data, entomology findings) are not routinely ingested into blood service risk dashboards.

The architecture is therefore optimized for static compliance, not for adaptive risk management in the face of expanding arboviral threats.

4. What funders and policymakers can do in the next 3 years

The goal is not to replicate high-income pathogen-reduction strategies in every African blood service. It is to align blood safety architecture with realistic Aedes-borne risk and with the broader dengue-ready surveillance and diagnostic investments countries are already making.[1,4]

Tiered, context-appropriate responses for blood services facing arboviral risk.

Concrete priorities include:

• Make blood services explicit stakeholders in Aedes-borne preparedness plans. When countries update dengue and arboviral preparedness strategies under the WHO global plan,[4] require a specific blood safety annex with information flows, trigger thresholds, and decision-rights.
• Develop graded, context-appropriate risk-management playbooks. Design tiered responses: geographic donor deferral around outbreak epicentres, temporary restrictions on donors with recent febrile illness, or targeted testing in high-incidence zones during defined windows, based on adapted WHO Zika guidance.[5]
• Integrate blood safety indicators into national and regional dashboards. Overlay TTI screening and quality-assurance gaps with dengue and arboviral risk maps.[2,3,6,7]
• Invest in analytic capacity, not just new tests. Support modest data-system upgrades so donor, TTI, and arboviral surveillance data can be analyzed together.
• Frame Aedes-sensitive blood safety as dual-benefit biosecurity. Changes for dengue, Zika, and chikungunya readiness also strengthen preparedness for other emerging transfusion-relevant pathogens.

5. How this builds on Biovector's dengue architecture work

Biovector's Tier 2 brief on dengue surveillance and diagnostics in Sub-Saharan Africa treats blood systems as adjacent but largely out of scope.[1] This Rapid Insight Note narrows in on that interface.

It accepts the Tier 2 thesis about misaligned surveillance and diagnostic architectures, then asks a specific biosecurity question: what happens if blood safety architectures remain static while dengue-ready surveillance and diagnostics improve?

The implication is that funders and policymakers should not treat blood safety as an afterthought in Aedes-borne preparedness. The same window of opportunity that exists to fix dengue surveillance architectures over the next 3 years can and should be used to bring African blood systems into the conversation in ways that are realistic for regional constraints.

One-page investment brief: priority asks, KPIs, and illustrative pilot budgets.

[Download the Priority Investment Brief (PDF)]

References

1. [1] Biovector Innovations. Dengue's Silent Expansion in Sub-Saharan Africa: Closing the Diagnostic and Surveillance Gap Before It Normalizes. Tier 2 institutional brief, 2026.
2. [2] World Health Organization Regional Office for Africa. Blood safety in the WHO African Region. https://afro.who.int/health-topics/blood-safety
3. [3] World Health Organization Regional Office for Africa. Advancing universal access to safe, effective and quality-assured blood products in the WHO African Region: Framework 2026. https://iris.who.int/handle/10665/382267
4. [4] World Health Organization. Global strategic preparedness, readiness and response plan for dengue and other Aedes-borne arboviruses. 2024. https://www.who.int/publications/m/item/global-strategic-preparedness--readiness-and-response-plan-for-dengue-and-other-aedes-borne-arboviruses
5. [5] World Health Organization. Maintaining a safe and adequate blood supply during Zika virus outbreaks. Interim guidance, 2016. https://www.who.int/publications/i/item/WHO-ZIKV-HS-16.1
6. [6] de Oliveira G, et al. Dengue Virus Serotype 3 Infection in Angola. Emerging Infectious Diseases. 2025. https://wwwnc.cdc.gov/eid/article/31/11/25-1079
7. [7] Sagna T, et al. Serologic Evidence of Circulation of Multiple Arboviruses in Burkina Faso. Tropical Medicine and Infectious Disease. 2025;10(12):345. https://www.mdpi.com/2414-6366/10/12/345

Priority KPIs to judge entomology backbones: sentinel coverage, workforce strength, data-to-decision latency.

Abstract

Biovector's dengue architecture brief argues that Sub-Saharan Africa is structurally under-prepared for dengue because surveillance and diagnostic architectures lag the epidemiology, and entomology is chronically under-resourced.[1] Similar patterns appear across malaria and other Aedes-borne arboviruses: case-based surveillance and laboratory networks receive incremental investments, while entomological surveillance and vector intelligence remain an afterthought.[2]

This Tier 2 tactical brief makes a focused argument: the region needs a deliberate, minimal entomology backbone that is financially realistic yet decision-useful for multiple vector-borne threats. Drawing on WHO AFRO reports, a regional Aedes surveillance network in West Africa, community-based vector surveillance in Kenya, and emerging integrated vector control work,[2-6] the brief outlines what such a backbone should contain over the next 3-5 years and what funders and policymakers must prioritize to build it.

1. Why entomology is the weak link in Africa's vector-borne architectures

Dengue, malaria and other vector-borne diseases share a common failure mode in African health systems: the pathogen is increasingly well-characterized in patients and labs, but poorly tracked in vectors and environments.

Recent analyses for dengue in the WHO African Region show expanding Aedes-borne transmission and large country-level outbreaks, yet WHO reports consistently flag shortages of trained entomologists and vector control specialists, limited systematic vector surveillance, and heavy reliance on ad hoc partner deployments.[1,2] Malaria control programs, meanwhile, have built strong case surveillance and vector control campaign machinery, but still struggle with routine monitoring of vector species composition, biting behavior, and insecticide resistance across the region.[2,6]

Three structural features explain why entomology lags other components of vector-borne architectures:

• Human resources are thin, over-stretched and poorly institutionalized. In many countries, a handful of entomologists are expected to support malaria, dengue, other arboviruses, and sometimes neglected tropical diseases. WHO AFRO reports describe repeated deployments of a small pool of regional entomology experts to priority countries to design or rescue surveillance.[2] National positions are often project-funded, making it hard to sustain skills and institutional memory.
• Surveillance is project- and outbreak-driven, not routine. Entomological surveys are frequently commissioned around specific campaigns, outbreaks or research grants, rather than embedded as a continuous function. The West African Aedes Surveillance Network (WAASuN) was created in 2022 precisely because Aedes surveillance was patchy, uncoordinated and under-funded across the subregion.[3]
• Data rarely flow into decision-making systems. Even when vector data are collected, they are often stored in spreadsheets, academic datasets, or project reports and are weakly linked to IDSR, lab information systems, or national dashboards. Integrated vector control frameworks for malaria in Sub-Saharan Africa repeatedly note that entomological indicators are not systematically used to update intervention mixes or target geographies.[6]

The result is an architecture in which vector intelligence is sporadic, siloed, and slow relative to the pace of climatic, urban and behavioral change.

2. What current initiatives reveal about feasible entomology backbones

A set of recent African and regional initiatives offer clues on what a pragmatic entomology backbone could look like in practice.

2.1 Regional Aedes surveillance networks

The inaugural meeting of the West African Aedes Surveillance Network brought together researchers and program staff from multiple countries to map existing Aedes surveillance, harmonize methods, and identify gaps.[3]

• The need for standardized protocols and insecticide resistance testing tailored to Aedes rather than only Anopheles.
• The importance of using locally relevant reference strains and diagnostic doses rather than importing benchmarks from non-African contexts.
• A recognition that many countries lack basic supplies, trained staff, and operating budgets for routine Aedes surveillance.[3]

Crucially, WAASuN positioned itself not just as a research consortium, but as a vehicle to advocate for sustained financing and to collaborate with regional bodies like the West African Health Organization.

Suggested sentinel site distribution (illustrative) — adapt by country epidemiology.

2.2 Community-based surveillance and house modification in Kenya

In western Kenya, under conditions of high bed net coverage and relatively low malaria vector density, a study evaluated house eave screening as a way to reduce indoor mosquito entry and simultaneously monitor vector populations.[4] The trial showed that simple structural modifications significantly reduced indoor vector densities, and that routine community-based trapping and inspection can generate useful entomological data alongside control benefits.

This demonstrates that entomology backbones need not rely solely on national expert teams; they can leverage trained community members and environmental modifications where designs are clear and quality assurance is in place.[4]

2.3 Integrated arboviral projects and novel exposure metrics

The ArboFaso project in Burkina Faso, presented at a 2024 conference on Aedes and urban vector surveillance in Tanzania, exemplifies integrated approaches that simultaneously track human cases, animal hosts and mosquito populations to understand arboviral risk.[5] The same meeting highlighted the use of antibody responses to Aedes salivary proteins as a proxy for human exposure to mosquito bites, offering a potentially scalable way to infer changing exposure in urban settings.[5]

While such methods remain largely in the research domain, they signal an important design point: entomology backbones can combine classical indices (for example, larval indices and adult trap catches) with newer, more integrated or biologically grounded metrics where feasible.

2.4 Integrated malaria vector control frameworks

Systematic reviews of integrated malaria vector control strategies in Sub-Saharan Africa emphasize that entomological surveillance is most valuable when embedded in clear decision frameworks: which combinations of tools to deploy, when to rotate insecticides, how to prioritize geographies for interventions, and how to respond to shifts in vector behavior.[6]

In other words, the value of entomology is architectural, not just descriptive. Data need to be linked to pre-agreed decisions, not collected for their own sake.

Link entomology to IDSR, labs and dashboards — then to interventions.

3. Designing a minimal entomology backbone for Sub-Saharan Africa (next 3-5 years)

A realistic entomology backbone in the region should be cross-pathogen, tiered, and decision-linked.

• Cross-pathogen: serving malaria, dengue, other arboviruses and emerging vector-borne threats.
• Tiered: differentiating roles for national, regional and peripheral levels.
• Decision-linked: hard-wired into specific surveillance, control and financing decisions.

At minimum, the next 3-5 years should deliver four linked components.

3.1 Sentinel entomology sites with clear national ownership

Countries should designate a small number of sentinel sites (for example, 5-20 per country depending on size and epidemiology) that together represent key ecological and epidemiological contexts: dense urban centers, secondary cities, peri-urban fringes, and high-burden rural or border areas.

At these sites, standardized protocols would be used to track:

• Vector species composition and abundance (Aedes, Anopheles and relevant local vectors).
• Insecticide resistance profiles using locally relevant diagnostic doses for both genera.[3]
• Simple environmental and housing indicators that shape breeding and biting risk (water storage, waste management, house structure).[4]

National public health institutes or vector control units should formally own these sites, with clear budgets and staffing plans, even if partners support start-up.

3.2 A small but durable entomology workforce core

Rather than relying solely on small numbers of PhD-level entomologists, ministries can build layered cadres:

• A national core of entomologists and vector control specialists (for example, housed in NPHIs or malaria programs) responsible for protocol design, quality assurance and data interpretation.[2]
• Mid-level surveillance officers at regional or provincial level trained in basic vector sampling, identification and data management.
• Community-based workers or environmental health officers supporting routine trapping, larval surveys and simple house or environmental assessments, as in the Kenyan eave-screening studies.[4]

Layered workforce: national core → regional technicians → community monitors.

Funders can support this by underwriting multi-year positions and training programs rather than exclusively short-term project staff.

3.3 Integrated data flows into national dashboards and risk assessment tools

Vector data from sentinel sites and campaigns should not sit in stand-alone spreadsheets. Instead, ministries and institutes should design basic data pipelines that:

• Link entomological indicators to IDSR and lab information systems via shared unique location codes.
• Feed summary entomology metrics into national dashboards and rapid risk assessment tools for dengue and other arboviruses, similar to how Tanzania's dengue risk framework integrates epidemiological and environmental indicators.[1,6]
• Flag predefined thresholds that trigger review of intervention mixes (for example, rising pyrethroid resistance, expansion of Aedes indices into new urban districts, or sharply increasing proxies of Aedes exposure).[5,6]

This does not require sophisticated real-time analytics everywhere; the critical design move is to agree how entomology metrics change decisions before collecting more data.

3.4 Regional collaboration and surge support for entomology

No single country can sustain deep entomology capacity for all threats. Regional mechanisms, such as WAASuN, WHO AFRO's entomology deployments and inter-country working groups, can provide:

• Reference laboratories and insectaries for specialized tests and strain maintenance.[3]
• Technical surge teams that support countries during outbreaks or during the design of new surveillance systems.[2]
• Shared training and standard-setting, including curricula for entomology technicians and harmonized reporting templates.

Funders should treat these as regional public goods: investments that make individual country entomology backbones more viable.

4. Implications for funders and policymakers

For decision-makers deciding how to allocate limited resources across vector-borne agendas, the question is not whether to fund entomology in the abstract. It is whether to build a small, well-designed backbone now, or continue to operate with episodic, project-driven vector intelligence. Over the next 3-5 years, concrete priorities include:

Tiered implementation roadmap for building a minimal entomology backbone (3–5 years).

• Ring-fence minimum entomology budgets inside surveillance and diagnostics portfolios. Require that major dengue, malaria and arboviral grants include explicit, costed entomology components (sentinel sites, staff, basic equipment). Protect those lines from being cannibalized for commodities alone when budgets tighten.[2,6]
• Finance multi-year entomology positions and training. Underwrite a small national core of entomologists and vector control specialists plus regional technician cadres. Support joint training programs linked to regional networks like WAASuN to reduce duplication and raise standards.[2,3]
• Condition support on data-use architectures, not only data collection. Ask ministries and institutes to specify how entomology indicators will be linked to IDSR, lab systems and rapid risk assessment tools, and which decisions they will inform.[1,6] Encourage pilots that demonstrate how entomology-informed decisions change intervention mixes and timing.
• Back regional entomology public goods. Provide predictable financing to regional networks, reference labs and training centers that serve multiple countries.[2,3] Use these platforms to develop and disseminate African-appropriate protocols for Aedes and Anopheles surveillance and resistance monitoring.[3,5]
• Frame entomology investment as dual-benefit biosecurity. Emphasize that improvements to vector intelligence for dengue and malaria will also strengthen readiness for emerging arboviruses and climate-sensitive threats. Connect entomology backbones to broader climate resilience, epidemic intelligence and biosecurity narratives that funders already prioritize.[1,2,6,7]

If these architectural moves are made now, Africa's entomology backbone can evolve from a fragile, project-dependent layer into a modest but reliable source of vector intelligence that makes surveillance, diagnostics and control more effective.

5. How this builds on Biovector's existing work

This brief deliberately builds on Biovector's canonical dengue architecture piece rather than duplicating it.[1]

• The dengue Tier 2 brief treats entomology as one component within a broader surveillance and diagnostics architecture problem.
• This Tier 2 tactical brief elevates entomology itself as the core architectural lens, using dengue, malaria and emerging arboviruses as joint use cases.
• Together with the Rapid Insight Note on Aedes-borne arboviruses and African blood safety, these pieces begin to map two critical interfaces in Africa's biosecurity architecture: blood systems and entomology backbones.[1,2]

Future work can extend this line into pathogen-specific or geography-specific diagnostics and financing architectures, but the entomology backbone outlined here is a necessary cross-cutting layer.

One-page summary: rationale, three priority asks, illustrative pilots & contact.

[Download the Priority Investment Brief (PDF)]

References

1. [1]Biovector Innovations. Dengue's Silent Expansion in Sub-Saharan Africa: Closing the Diagnostic and Surveillance Gap Before It Normalizes. Tier 2 institutional brief, 2026.
2. [2]World Health Organization Regional Office for Africa. Annual report of the Regional Director on the work of WHO in the African Region (sections on vector-borne diseases, entomological surveillance and deployment of entomologists). Various years, 2018-2025. Available via WHO AFRO data and publications portal: https://www.afro.who.int/publications
3. [3]West African Aedes Surveillance Network (WAASuN). Strengthening Aedes surveillance and control capacity in West Africa: Report of the inaugural network meeting. Parasites & Vectors. 2022.
4. [4]Zhou G, et al. Effect of house eave screening on indoor mosquito densities under high long-lasting insecticidal net coverage in western Kenya. Malaria Journal. 2023.
5. [5]International Conference on Aedes-Borne Diseases and Urban Vector Control, Tanzania, 2024. Session summaries on the ArboFaso project in Burkina Faso and the use of antibody responses to Aedes salivary proteins as indicators of human exposure. Parasites & Vectors. 2025.
6. [6]Integrated malaria vector control strategies in sub-Saharan Africa: protocol for a systematic review. 2025. PubMed ID: 39920058. Available from: https://pubmed.ncbi.nlm.nih.gov/39920058/
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