field-caught culex erythrothorax larvae found naturally infected with west nile virus in grand county, utah.culex erythrothorax larvae were collected from a bulrush-cattail marsh near moab, grand county, utah, october 28, 2004, and found positive for west nile virus (wnv) rna by real-time reverse-transcriptase polymerase chain reaction (rt-pcr). this demonstrates wnv vertical transmission in this species in the wild and suggests that vertical transmission in overwintering cx. erythrothorax larvae may contribute to wnv overwintering.200617067064
hematophagous diptera collected from a horse and paired carbon dioxide-baited suction trap in southern california: relevance to west nile virus epizootiology.hematophagous diptera landing on a horse were removed by vacuum, and their numbers were related to a paired carbon dioxide-baited suction trap at three locations in southern california where west nile virus activity was high during the preceding year. insects collected from the horse included mosquitoes (nine species), biting midges (culicoides sonorensis wirth & jones), and black flies (simulium bivittatum malloch). mosquitoes were predominantly collected from the head, crest, withers, neck, ch ...200818283951
mosquito species richness, composition, and abundance along habitat-climate-elevation gradients in the northern colorado front range.we exploited elevation gradients (1,500-2,400 m) ranging from plains to montane areas along the poudre river and big thompson river in the northern colorado front range to determine how mosquito species richness, composition, and abundance change along natural habitat-climate-elevation gradients. mosquito collections in 26 sites in 2006 by using co2-baited cdc light traps yielded a total of 7,136 identifiable mosquitoes of 27 species. commonly collected species included aedes vexans (meigen) (n ...200818714885
potential vectors of west nile virus in a semiarid environment: doña ana county, new mexico.the potential vectors of west nile virus (family flaviviridae, genus flavivirus, wnv) in doña ana county, nm, were determined during 2004 and 2005. trapping was conducted using centers for disease control and prevention miniature light-traps baited with dry ice, and gravid traps baited with a hay infusion. in addition, sentinel chickens were housed at four of the trapping locations to monitor wnv epizootic transmission. in total, 5,576 pools consisting of 115,797 female mosquitoes were tested fo ...200919960700
vector-host interactions governing epidemiology of west nile virus in southern california.southern california remains an important focus of west nile virus (wnv) activity, with persistently elevated incidence after invasion by the virus in 2003 and subsequent amplification to epidemic levels in 2004. eco-epidemiological studies of vectors-hosts-pathogen interactions are of paramount importance for better understanding of the transmission dynamics of wnv and other emerging mosquito-borne arboviruses. we investigated vector-host interactions and host-feeding patterns of 531 blood-engor ...201021118934
mosquito capture rate using co2-baited traps in relation to distance from water and height: implications for avian disease transmission.accumulating evidence suggests that enzootic transmission of pathogens such as west nile virus (wnv) by mosquitoes is governed by host-bird interactions, including mosquito preferences for specific species and developmental stages of host birds, host bird availability, and host defensive behavior. here, we examined how the attack rate of five mosquito species in southern california was influenced by the position of co2-baited traps in relation to distance from water and trap height. we identifie ...201627493249
host (avian) biting preference of southern california culex mosquitoes (diptera: culicidae).the host preference of a vector mosquito species plays a significant role in determining human and animal risk of infection with mosquito-transmitted pathogens. host preferences of common southern california culex species for four bird species, american crow (corvus brachyrhynchos), house sparrow (passer domesticus), house finch (carpodacus mexicanus), and mourning dove (zenaida macroura), were examined by determining the proportion of each mosquito species that successfully engorged on each of ...201222679878
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