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west nile virus activity--united states, july 28-august 3, 2004.during july 28-august 3, a total of 141 cases of human west nile virus (wnv) illness were reported from 11 states (alabama, arizona, california, colorado, florida, illinois, nevada, new york, north dakota, south dakota, and texas). during 2004, a total of 20 states have reported a total of 406 cases of human wnv illness to cdc through arbonet. of these, 247 (61%) were reported from arizona. a total of 226 (57%) of the 406 cases occurred in males; the median age of patients was 51 years (range: 1 ...200415295314
west nile virus activity--united states, august 18-24, 2004.during august 18-24, a total of 154 cases of human west nile virus (wnv) illness were reported from 18 states (alabama, arizona, california, colorado, connecticut, florida, georgia, illinois, kentucky, minnesota, mississippi, missouri, nevada, new mexico, north carolina, south dakota, tennessee, and wisconsin).200415329654
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).200415371969
west nile virus activity--united states, september 22-28, 2004.during september 22-28, a total of 180 cases of human west nile virus (wnv) illness were reported in the district of columbia (dc) and 24 states (alabama, arizona, california, georgia, illinois, iowa, kansas, kentucky, louisiana, maryland, michigan, minnesota, mississippi, missouri, montana, nebraska, nevada, new mexico, ohio, pennsylvania, texas, utah, wisconsin, and wyoming).200415457147
sequence analyses of 2012 west nile virus isolates from texas fail to associate viral genetic factors with outbreak magnitude.in 2012, texas experienced the largest outbreak of human west nile encephalitis (wne) since the introduction of west nile virus (wnv) in 2002. despite the large number of wnv infections, data indicated the rate of reported wne among human cases was no higher than in previous years. to determine whether the increase in wnv human cases could have been caused by viral genetic changes, the complete genomes of 17 isolates made from mosquito pools in dallas and montgomery counties in 2012 were sequenc ...201323817333
winter biology of wetland mosquitoes at a focus of eastern equine encephalomyelitis virus transmission in alabama, usa.at temperate latitudes, vectors and pathogens must possess biological mechanisms for coping with cold temperatures and surviving from one transmission season to the next. mosquitoes that overwinter in the adult stage have been proposed as winter maintenance hosts for certain arboviruses. in the cases of west nile virus (family flaviviridae, genus flavivirus) and st. louis encephalitis virus (family flaviviridae, genus flavivirus), discovery of infected overwintering females lends support to this ...201121936314
the effects of west nile virus on the reproductive success and overwinter survival of eastern bluebirds in alabama.we tested for negative effects of west nile virus (wnv) on a breeding population of eastern bluebirds in alabama by comparing fecundity and reproductive success in years before and after the arrival of wnv and by comparing fecundity, reproductive success, and overwinter survival of seropositive and seronegative individuals within the same population in the same years. we found that female bluebirds were more likely to be seropositive than male bluebirds. age and individual condition did not affe ...201019589058
west nile virus activity--united states, september 29-october 5, 2004.during september 29-october 5, a total of 81 cases of human west nile virus (wnv) illness were reported from 18 states (alabama, arizona, arkansas, california, florida, georgia, illinois, iowa, kansas, kentucky, minnesota, missouri, ohio, oklahoma, pennsylvania, south dakota, texas, and virginia).200415470326
west nile virus activity--united states, august 4-10, 2004.during august 4-10, a total of 89 cases of human west nile virus (wnv) illness were reported from 14 states (alabama, arizona, california, florida, illinois, kentucky, louisiana, minnesota, mississippi, missouri, new mexico, north dakota, south dakota, and wyoming).200415306758
rapid assessment of mosquitoes and arbovirus activity after floods in southeastern kansas, 2007.a rapid assessment was conducted in july-august 2007 to determine the impact of heavy rains and early summer floods on the mosquitoes and arbovirus activity in 4 southeastern kansas counties. during 10 days and nights of collections using different types and styles of mosquito traps, a total of 10,512 adult female mosquitoes representing 29 species were collected, including a new species record for kansas (psorophora mathesoni). high numbers of aedes albopictus were collected. over 4,000 specime ...200919852215
discovery of aedes albopictus infected with west nile virus in southeastern pennsylvania.in august 2000, aedes albopictus was found in a co2-baited centers for disease control light trap in eastern philadelphia, pa. in late september 2000, west nile viral antigen was detected by reverse transcription-polymerase chain reaction testing from a pool of 2 ae. albopictus mosquitoes that were collected in southwestern montgomery county.200212083357
west nile virus activity--united states, july 21-27, 2004.during july 21-27, a total of 83 cases of human west nile virus (wnv) illness were reported from 13 states (alabama, arizona, arkansas, california, colorado, florida, illinois, iowa, missouri, new mexico, ohio, pennsylvania, and south dakota).200415282450
west nile virus activity--united states, august 11-17, 2004.during august 11-17, a total of 194 cases of human west nile virus (wnv) illness were reported from 17 states (alabama, arizona, california, colorado, florida, illinois, louisiana, maryland, minnesota, mississippi, missouri, new mexico, ohio, south dakota, texas, utah, and virginia).200415318160
west nile virus infection in mosquitoes in the mid-south usa, 2002-2005.west nile virus (family flaviviridae, genus flavivirus, wnv) was first detected in the tennessee valley and in alabama in august 2001. in summer 2002, intensive viral activity was seen, but in subsequent years, viral activity settled into an enzootic pattern. here, we report an analysis of viral activity in the mosquito fauna in the mid-south from 2002 (the first year viral activity was detected in mosquitoes) through 2005. eight mosquito species were infected with wnv during 2002. however, vira ...200717294929
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