Tracking Plasmodium knowlesi through faecal DNA for monitoring zoonotic transmission in wild macaques across Southeast and South Asia.

Wannigama, Dhammika Leshan; Amarasiri, Mohan; Phattharapornjaroen, Phatthranit; Hurst, Cameron; Modchang, Charin; Cynthia, Bernadina; Miyanaga, Kazuhiko; Cui, Longzhu et al. · J Infect Dis · 2026

cross_sectional · Level IV

Where this comes from

Abstract

We conducted the non-invasive surveillance of Plasmodium knowlesi in wild macaques using 4,752 faecal samples collected across nine endemic countries. Parasite DNA was detected in 390 samples (8.2%), with positivity rates ranging from 1.4% to 18.4%. This provides the first field-based evidence that P. knowlesi DNA in faeces shed by macaques and present under natural conditions can be detected. These findings validate faecal sampling as a practical and scalable tool for tracking zoonotic-malaria. The results support integration into forest-runoff and rural wastewater surveillance systems, offering new opportunities for early detection of pathogens and environmental monitoring at the human-wildlife interface.