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Volume 32, Supplement –Summer 2026
SUPPLEMENT ISSUE
Supplement
Laboratory Assessment of Wastewater as Surveillance Tool for West Nile Virus, United States
Figure 2

Figure 2. West Nile virus (WNV) RNA detected in wastewater collections from sampled jurisdictions compared with other surveillance methods from laboratory assessment of wastewater as surveillance tool for WNV, United States. A) County A, California, USA. B) County B, Arizona, USA. C) County C, Illinois, USA. D) County D, Nebraska, USA. E) County E, Colorado, USA. F) County F, Indiana, USA. Wastewater samples from each county were tested by digital reverse transcription PCR and real-time reverse transcription PCR for WNV RNA. Wastewater data are compared with the number of other WNV-positive surveillance events reported to ArboNET (y-axis): human, equine, Culex mosquito, sentinel, and bird samples. Timeline for samples is dictated as days after first surveillance event (x-axis). Dotted vertical lines mark the time frame for available archived wastewater.