study: west nile virus cost equine industries in colorado, nebraska millions in 2002. 200312830851
outcome of equids with clinical signs of west nile virus infection and factors associated with determine outcome of equids in the western united states with clinical signs of west nile virus (wnv) infection and identify factors associated with risk of death in infected equids.200415323385
serologic survey of select infectious diseases in coyotes and raccoons in obtain data about select zoonotic and other infectious diseases in free-ranging predators in five ecoregions in nebraska, sera were collected from 67 coyotes (canis latrans) and 63 raccoons (procyon lotor) from november 2002 through january 2003. for coyotes, antibodies were detected against canine distemper virus (cdv, 61%), francisella tularensis (32%), rickettsia rickettsi (13%), and flaviviruses (48%). none of the coyote sera had antibodies to borrelia burgdorferi, brucella canis, or six ...200516456169
geographic factors contributing to a high seroprevalence of west nile virus-specific antibodies in humans following an epidemic.sera of 624 blood donors were evaluated to determine seroprevalence of west nile virus (wnv) antibodies following the 2003 wnv epidemic in nebraska. geographic factors contributing to differences in wnv seropositivity were evaluated. the overall prevalence of wnv in nebraska was higher than reported previously in other u.s. locations (9.5% wnv immunoglobulin g seroprevalence rate), with the highest prevalence identified in the western part of the state (19.7%), followed by the central (13.8%) an ...200616522771
spatio-temporal cluster analysis of county-based human west nile virus incidence in the continental united states.west nile virus (wnv) is a vector-borne illness that can severely affect human health. after introduction on the east coast in 1999, the virus quickly spread and became established across the continental united states. however, there have been significant variations in levels of human wnv incidence spatially and temporally. in order to quantify these variations, we used kulldorff's spatial scan statistic and anselin's local moran's i statistic to uncover spatial clustering of human wnv incidence ...200919594928
west nile virus disease and other arboviral diseases --- united states, 2010.arthropod-borne viruses (arboviruses) are transmitted to humans primarily through the bites of infected mosquitoes and ticks. since west nile virus (wnv) was first detected in the western hemisphere in 1999, it has become the leading cause of neuroinvasive arboviral disease in the united states. however, several other arboviruses continue to cause sporadic cases and seasonal outbreaks of neuroinvasive disease (i.e., meningitis, encephalitis, or acute flaccid paralysis). this report summarizes su ...201121814163
west nile virus activity - united states, 2009.west nile virus (wnv) was first detected in the western hemisphere in 1999 in new york city and has since caused seasonal epidemics of febrile illness and neurologic disease across the united states, where it is now the leading cause of arboviral encephalitis. this report updates a previous report and summarizes wnv activity in the united states reported to cdc in 2009. a total of 38 states and the district of columbia (dc) reported 720 cases of wnv disease. of these, 33 states and dc reported 3 ...201020592686
prevalence and pathology of west nile virus in naturally infected house sparrows, western nebraska, 2008.nestling birds are rarely sampled in the field for most arboviruses, yet they may be important in arbovirus amplification cycles. we sampled both nestling and adult house sparrows (passer domesticus) in western nebraska for west nile virus (wnv) or wnv-specific antibodies throughout the summer of 2008 and describe pathology in naturally infected nestlings. across the summer, 4% of nestling house sparrows were wnv-positive; for the month of august alone, 12.3% were positive. two wnv-positive nest ...201020439979
ecological niche of the 2003 west nile virus epidemic in the northern great plains of the united states.the incidence of west nile virus (wnv) has remained high in the northern great plains compared to the rest of the united states. however, the reasons for the sustained high risk of wnv transmission in this region have not been determined. to assess the environmental drivers of wnv in the northern great plains, we analyzed the county-level spatial pattern of human cases during the 2003 epidemic across a seven-state region.200819057643
west nile virus neuroinvasive disease incidence in the united states, the geographic range of reported human west nile virus (wnv) disease has expanded across the united states, seasonal transmission and outbreaks have persisted over several years in many areas of the country. west nile virus neuroinvasive disease (wnnd) case reports from 2002 to 2006 were reviewed to determine which areas of the country have the highest reported cumulative incidence and whether those areas have had consistently high annual incidence. during the 5-year period examined, 9632 cas ...200818237264
performance of a commercial immunoglobulin m antibody capture assay using analyte-specific reagents to screen for interfering factors during a west nile virus epidemic season in 2003, the nebraska public health laboratory tested more than 10,371 serum and 516 cerebral spinal fluid specimens. results showed that without performing the interfering factors screen for specimens in the low positive index value range of >1.1 to <or=3.5, a false positivity rate of 6.5% would have been realized.200717121982
the effect of pesticide spraying on the rate and severity of ed asthma.we report on the incidence of emergency department (ed) asthma presentations and admissions to the lincoln hospital, located in the south bronx of new york city, during the 1999 eradication program of the mosquito vector for west nile virus. spraying of malathion and resmethrin occurred in the hospital's geographic area over 4 days in september 1999. during that time, 1318 pediatric and adult patients were seen in the ed for asthma-related symptoms. of these, 222 (16.8%) were hospitalized. emerg ...200516032612
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).200415514584
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
west nile virus activity--united states, june 16-22, of june 22, 2004, seven states reported a total of 32 human cases of west nile virus (wnv) illness to cdc through arbonet. twenty cases were reported from arizona, six cases from california, two cases from florida, and one case each from nebraska, new mexico, south dakota, and wyoming. twenty-three (72%) of the cases occurred in males; the median age of patients was 52 years (range: 9-78 years), and dates of illness onset ranged from may 8 to june 7. sixteen (50%) of the patients had neuroinv ...200415215743
west nile virus infection in reindeer (rangifer tarandus).west nile virus (wnv) infection in 4 reindeer (rangifer tarandus) resulted in lymphohistiocytic encephalomyelitis within the medulla oblongata and cervical spinal cord. immunohistochemistry revealed wnv antigen within neurons and among mononuclear cell infiltrates. these represent the first known cases of clinical wnv infection in cervidae. clinical signs and lesions were similar to those described in horses. nucleotide sequence of a 768-bp region of the wnv e-glycoprotein gene revealed 1 nucleo ...200415152836
a temperature-limited assessment of the risk of rift valley fever transmission and establishment in the continental united states of america.the rapid spread of west nile virus across north america after its introduction in 1999 highlights the potential for foreign arboviruses to become established in the united states of america. of particular concern is rift valley fever virus (rvfv), which has been responsible for multiple african epidemics resulting in death of both humans and livestock, as well as major economic disruption due to livestock loss and trade restrictions. modern globalization, travel, and commerce allow viruses to e ...201222639118
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, june 23-29, of june 29, eight states had reported a total of 57 human cases of west nile virus (wnv) illness to cdc through arbonet in 2004. a total of 38 cases had been reported from arizona, 10 from california, three from new mexico, two from florida, and one each from michigan, nebraska, south dakota, and wyoming. thirty-six (64%) of the cases occurred in males; the median age of patients was 53 years (range: 9-84 years), and dates of illness onset ranged from april 23 to june 15. of the 57 cases, one ...200415229416
west nile virus activity--united states, january 1-august 15, 2006.this report summarizes west nile virus (wnv) surveillance data reported to cdc through arbonet as of 3 a.m. mountain daylight time, august 15, 2006. a total of 26 states had reported 388 cases of human wnv illness to cdc. a total of 214 (56%) cases for which such data were available occurred in males; median age of patients was 49 years (range: 2-91 years). dates of illness onset ranged from january 6 to august 10; a total of 13 cases were fatal. a total of 68 presumptive west nile viremic blood ...200616915222
west nile virus activity--united states, september 15-21, 2004.during september 15-21, a total of 218 cases of human west nile virus (wnv) illness were reported from 21 states (arizona, california, florida, illinois, indiana, kansas, maryland, michigan, minnesota, mississippi, missouri, nebraska, nevada, new mexico, north dakota, oklahoma, south dakota, texas, utah, wisconsin, and wyoming).200415385920
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