Exploiting mosquito sugar feeding to detect mosquito-borne pathogens

Area of Science:

• Arthropod-borne virus (arbovirus) research
• Vector-borne disease surveillance
• Molecular diagnostics

Background:

• Arboviruses pose a significant global health threat, with increasing geographic spread.
• Current arbovirus surveillance methods are resource-intensive and logistically challenging.
• Effective surveillance is crucial for biosecurity and disease management.

Purpose of the Study:

• To develop and validate a novel, simplified system for arbovirus surveillance.
• To detect arboviruses by analyzing mosquito expectorates during sugar feeding.
• To improve the efficiency and accessibility of pathogen monitoring in vector populations.

Main Methods:

• Mosquitoes captured in CO(2)-baited traps were allowed to feed on honey-soaked nucleic acid preservation cards.
• Real-time reverse transcription-PCR was used to detect viral RNA on the cards.
• Field trials were conducted in Australia to assess system performance.

Main Results:

• The system successfully detected Ross River and Barmah Forest viruses in field-deployed traps.
• Viral RNA remained preserved on cards for at least seven days.
• The method eliminated the need for direct mosquito handling and processing.

Conclusions:

• This innovative surveillance system offers a simplified and effective approach to monitoring arboviruses in mosquito populations.
• The system's ease of use and data preservation capabilities can transform vector-borne disease surveillance.
• It enables continuous data collection and convenient laboratory analysis, enhancing disease control efforts.