Table 1.

Thirteen mosquito species infected with virus,^* North Dakota, 2003–2006

Species	Number of specimens by year				Totals	Percent
	2003	2004	2005	2006
Aedes cinereus	0	593	5,867	218	6,678	0.2
Aedes vexans	223,693	519,443	1,477,623	591,152	2,811,911	83.2
Anopheles earlei	21	6	72	79	178	< 0.1
Coquillettidia perturbans	1,021	1,574	2,199	246	5,040	0.2
Culex tarsalis	3,028	20,608	48,615	478	72,729	2.2
Culiseta inornata	983	6,336	21,566	508	29,393	0.9
Ochlerotatus dorsalis	2,511	15,279	36,953	1,375	56,118	1.7
Ochlerotatus flavescens	579	463	938	310	2,290	0.1
Ochlerotatus melanimon	403	8,381	35,559	46,306	90,649	2.7
Ochlerotatus spencerii	0	479	368	26	873	< 0.1
Ochlerotatus sticticus	176	7,555	25,985	416	34,132	1.0
Ochlerotatus triseriatus	95	56	106	0	257	< 0.1
Ochlerotatus trivittatus	16,017	94,904	135,873	12,757	259,551	7.7
Other species*	393	1,751	3,274	2,666	8,084	0.2
Totals	248,920	677,428	1,794,998	656,537	3,377,883

^*Viruses were not isolated from 21 species; these species are not listed.