Aptamer Group has started development of Optimer binders for a potential rapid diagnostic test targeting the Bundibugyo strain of Ebola virus, as work begins on assay components for field-compatible outbreak testing.
The York-based life sciences company is developing synthetic binders that could be integrated into rapid diagnostic formats. Materials required for the development programme are now on site, allowing Optimer discovery work to begin.
Bundibugyo Ebola is less common than the Zaire strain, but it creates a serious diagnostic challenge because its viral proteins differ substantially from better-known Ebola variants. Diagnostic approaches developed around other strains may not provide the sensitivity needed for fast use in outbreak conditions, where early recognition can affect isolation, treatment, and containment.
The current programme follows a significant Bundibugyo Ebola outbreak that began in May 2026 in the Democratic Republic of Congo and Uganda. The strain has been associated with fatality rates of around 30% to 50%, depending on care quality, speed of recognition, treatment access, and local response conditions.
Aptamer’s Optimer platform is based on engineered synthetic binders selected to recognise specific molecular targets. The company has previously applied the technology to infectious disease diagnostics, including SARS-CoV-2 binders that were translated into lateral flow test formats during the COVID-19 pandemic.
Binder discovery is only the first stage of a diagnostic product chain. Any future test would have to account for assay format, sample handling, sensitivity, specificity, stability, manufacturability, quality control, packaging, and deployment conditions. Field diagnostics add further engineering pressure because tests may be used where laboratory infrastructure, refrigeration, trained personnel, and rapid logistics are limited.
Rapid infectious disease tests have to balance analytical performance with manufacturability. A test that is technically sensitive but fragile in distribution, difficult to produce, or complex to interpret may struggle during an outbreak. The assay therefore has to be designed around the operating environment, not only the molecular target.
That requirement has become more prominent since the COVID-19 pandemic, which exposed both the value of adaptable diagnostic platforms and the bottlenecks behind test availability. Reagents, membranes, plastics, packaging, automated assembly, quality systems, and regulatory documentation all determine whether a diagnostic can be supplied at useful scale.
Rare and emerging pathogens create a difficult commercial environment. Demand can be urgent but episodic, and outbreaks may occur in regions where procurement depends on public health agencies, donors, and international response mechanisms. Platform flexibility becomes valuable where discovery methods, manufacturing partners, and assay development workflows can be reused across several disease targets.
The technical challenge is also shaped by disease progression. Viral load, sample type, stage of infection, cross-reactivity, environmental conditions, and operator variability all affect field performance. Binder selection must therefore anticipate the downstream assay environment, including whether the eventual product is intended for lateral flow, laboratory use, or another rapid format.
Aptamer’s programme remains at an early stage, with the immediate task focused on generating binders with the required specificity and sensitivity. Any move into diagnostic validation would need further development work, including assay integration, analytical testing, and performance evaluation under intended-use conditions.
The work places synthetic binder development inside a wider need for faster diagnostic manufacturing. Outbreak response depends on companies that can move quickly from target selection to assay component production, while still meeting quality and performance requirements. Aptamer’s Bundibugyo Ebola programme will now test how its Optimer platform performs against a pathogen where speed, specificity, and field practicality are all decisive.
