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Table 5 Timing of WNV cases, Culex mosquito collections, and positive Culex pools from 2002–2006 in Iowa. Epidemiologic and entomologic data were compiled for the years 2002–2006 and are presented according to the ISO week of the year. Human case events are presented as reported by the Iowa Department of Public Health. Mosquito populations are derived using population data generated by [44]. Populations are expressed as a % of the total mosquitoes collected for each respective species. Positive WNV pools are expressed as a % of the total positive pools listed in the summation.

From: Landscape, demographic, entomological, and climatic associations with human disease incidence of West Nile virus in the state of Iowa, USA

Week of the Year % Human WNV Cases % Population as Measured with NJTL's % WNV Positive Pools
   Cx. tarsalis Cx. pipiens group Cx. tarsalis Cx. pipiens group
19 0.3 0.0 0.0   
20 0.0 0.0 0.0   
21 0.0 0.0 0.6 0.0 0.0
22 0.0 1.6 3.3 0.0 0.0
23 0.3 5.8 6.1 0.0 0.0
24 0.0 4.0 7.9 0.0 4.9
25 0.3 5.3 10.1 0.0 0.0
26 1.0 11.5 10.2 0.0 2.4
27 0.7 9.3 7.8 0.0 0.0
28 2.3 5.7 4.0 0.0 0.0
29 0.7 5.0 5.2 7.7 2.4
30 3.0 6.6 5.5 0.0 0.0
31 4.0 10.2 5.9 0.0 2.4
32 5.7 7.5 5.7 0.0 4.9
33 8.7 7.8 4.8 15.4 22.0
34 8.1 7.3 5.6 0.0 4.9
35 14.4 3.2 4.3 46.2 9.8
36 16.8 2.9 5.1 7.7 12.2
37 16.1 2.5 4.5 23.1 17.1
38 7.4 2.6 3.0 0.0 12.2
39 5.0 0.9 0.4 0.0 4.9
40 2.0 0.0 0.0 0.0 0.0
41 1.3 0.0 0.0 0.0 0.0
42 0.7 0.0 0.0 0.0 0.0
43 0.7 0.0 0.0 0.0 0.0
44 0.0 0.0 0.0 0.0 0.0
45 0.0 0.0 0.0 0.0 0.0
46 0.3 0.0 0.0 0.0 0.0
Total 298 total cases 6086 33255 13(+)/193 pools 41(+)/788 pools