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.

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