Fig. 3.
Culex WNV infection indices and human case onset within the city of Gilbert, May 23–July 31. 3a: Culex maximum likelihood infection rate (IR; in positive mosquitoes per 1000 tested) and human cases in Gilbert. Solid line: combined Culex IR; dashed line: Cx. quinquefasciatus IR; dotted line: Cx. tarsalis IR. 3b: Culex vector index (VI; in positive mosquitoes per trap night) and human cases in Gilbert. Solid line: combined Culex VI; dashed line: Cx. quinquefasciatus VI; dotted line: Cx. tarsalis VI.