| surveillance of st. louis encephalitis virus vectors in grand junction, colorado, in 1987. | grand junction, colorado, was the site of a st. louis encephalitis (sle) outbreak in 1985. epidemiologic and ecologic investigations in 1985 and 1986 suggested that culex tarsalis may not have been the exclusive vector in the outbreak and that cx. pipiens may have contributed to transmission as an accessory vector. a limited field study in 1987 generally confirmed observations from 1986 that cx. pipiens was more abundant than cx. tarsalis in late summer when sle virus transmission normally occur ... | 1989 | 2746202 |
| epidemiologic aspects of a st. louis encephalitis outbreak in mesa county, colorado. | an epidemic of st. louis encephalitis in 1985 in mesa county, colorado, led to 17 cases, including one fatality. risk was associated with advanced age and residence in grand junction, the county's principal city. a trend was observed toward higher risk in females. however, increased risk in females was not associated with higher infection rates (increased exposure). capture enzyme immunoassays detected specific immunoglobulin m (igm) and immunoglobulin a after infection. a serosurvey of grand ju ... | 1987 | 2887107 |
| entomologic studies after a st. louis encephalitis epidemic in grand junction, colorado. | in 1986, after a st. louis encephalitis epidemic in grand junction, colorado, in 1985, vector mosquitoes in the city were surveyed to correlate their bionomics and infection rates with the occurrence of human disease. no human cases were reported, but mosquito surveillance disclosed st. louis encephalitis virus in culex tarsalis and culex pipiens pipiens. mosquitoes were collected with gravid traps designed to attract cx. p. pipiens and with centers for disease control light traps. culex p. pipi ... | 1988 | 2899394 |
| comparative vector competence of culex tarsalis and culex quinquefasciatus from the coachella, imperial, and san joaquin valleys of california for st. louis encephalitis virus. | st. louis encephalitis (sle) virus has continued to be active in the colorado desert region of southern california (coachella and imperial valleys) since 1973, while it has virtually disappeared from the sacramento and san joaquin valleys of central california. consequently, comparative vector competence studies were undertaken from 1978 to 1981 to evaluate the susceptibility of populations of culex quinquefasciatus and culex tarsalis from the san joaquin and coachella/imperial valleys to oral i ... | 1983 | 6301301 |
| arbovirus surveillance in northern colorado, 1987 and 1991. | arbovirus surveillance was conducted during an epizootic of western equine encephalitis (wee) during 1987 and during a nonepizootic year, 1991, in the same area in northern colorado. mosquitoes were collected in larimer county, co, during weeks 33-37 (10 august to 7 september) in 1987 and during weeks 26-35 (24 june to 26 august) in 1991. in total, 13,099 mosquitoes in 694 pools collected during 1987 and 8,672 mosquitoes in 242 pools collected during 1991 were tested for virus. wee virus was iso ... | 1993 | 8433334 |
| west nile virus infection and serologic response among persons previously vaccinated against yellow fever and japanese encephalitis viruses. | it is hypothesized that previous heterologous flaviviral exposure may modulate clinical illness among persons infected with west nile virus (wnv). little is known about the serological response in such persons. in summer 2003, a wnv outbreak occurred in colorado, the location of the centers for disease control and prevention, division of vector-borne infectious diseases (dvbid). dvbid employees, most previously vaccinated with yellow fever virus (yfv) or japanese encephalitis virus (jev) vaccine ... | 2005 | 16011430 |
| persistent west nile virus transmission and the apparent displacement st. louis encephalitis virus in southeastern california, 2003-2006. | west nile virus (family flaviviridae, genus flavivirus, wnv) invaded the colorado desert biome of southern california during summer 2003 and seemed to displace previously endemic st. louis encephalitis virus (family flaviviridae, genus flavivirus, slev, an antigenically similar flavivirus in the japanese encephalitis virus serocomplex). western equine encephalomyelitis virus (family togaviridae, genus alphavirus, weev), an antigenically distinct alphavirus, was detected during 2005 and 2006, ind ... | 2008 | 18533445 |
| 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 ... | 2011 | 21814163 |