| west nile virus activity--united states, july 14-20, 2004. | during the week of july 14-20, a total of 74 cases of human west nile virus (wnv) illness were reported from seven states (arizona, california, florida, new mexico, new york, south dakota, and texas). | 2004 | 15269701 |
| west nile virus activity--united states, september 8-14, 2004. | during september 8-14, a total of 195 cases of human west nile virus (wnv) illness were reported from 26 states (alabama, arizona, arkansas, california, colorado, florida, georgia, idaho, illinois, iowa, kansas, maryland, minnesota, missouri, nebraska, nevada, new mexico, new york, north dakota, oklahoma, oregon, pennsylvania, south dakota, tennessee, texas, and wisconsin). | 2004 | 15371969 |
| west nile virus activity--united states, october 20-26, 2004. | during october 20-26, a total of 80 cases of human west nile virus (wnv) illness were reported from 16 states (arizona, california, florida, iowa, kentucky, louisiana, michigan, mississippi, missouri, montana, nebraska, new york, ohio, south dakota, texas, and utah). | 2004 | 15514584 |
| limited interdecadal variation in mosquito (diptera: culicidae) and avian host competence for western equine encephalomyelitis virus (togaviridae: alphavirus). | historically, western equine encephalomyelitis virus (weev) caused large equine and human epidemics in the americas from canada into argentina. despite recent enhanced surveillance for west nile virus, there have been few reports of equine or human cases and little documented enzootic activity of weev. during the past three years, weev has been active again in california, but without human or equine cases. in the current study, we compared host and vector competence of representative weev isolat ... | 2008 | 18385369 |
| impact of aerial spraying of pyrethrin insecticide on culex pipiens and culex tarsalis (diptera: culicidae) abundance and west nile virus infection rates in an urban/suburban area of sacramento county, california. | in response to an epidemic amplification of west nile virus (family flaviviridae, genus flavivirus, wnv), the sacramento and yolo mosquito and vector control district (symvcd) sprayed ultralow-volume (ulv) formulations of pyrethrin insecticide (evergreen ec 60-6: 6% pyrethrin insecticide, 60% piperonylbutoxide; mgk, minneapolis, mn, applied as 0.003 kg/ha [0.0025 lb/acre] ) over 218 km2 in north sacramento and 243.5 km2 in south sacramento on three consecutive evenings in august 2005. we evaluat ... | 2008 | 18714879 |
| blood-feeding patterns of the culex pipiens complex in sacramento and yolo counties, california. | mosquitoes in the culex pipiens complex are competent vectors of west nile virus (wnv; family flaviviridae, genus flavivirus) in the laboratory, and field-collected mosquitoes have tested positive for the virus in california and elsewhere. a better understanding of cx. pipiens complex blood-feeding patterns will help define the threat that these mosquitoes pose to human health and their role in wnv amplification in northern california. we collected blood-engorged cx. pipiens complex mosquitoes f ... | 2011 | 21485380 |
| human jamestown canyon virus infection --- montana, 2009. | jamestown canyon virus (jcv) is a mosquito-borne zoonotic pathogen belonging to the california serogroup of bunyaviruses. although jcv is widely distributed throughout temperate north america, reports of human jcv infection in the united states are rare. this is the first report of human jcv infection detected in montana, one of only 15 cases reported in the united states since 2004, when jcv became reportable. on may 26, 2009, a man aged 51 years with no travel history outside of montana went t ... | 2011 | 21617630 |