A survey of Wyoming mosquitoes for vectors of dog heartworm.

摘要

A survey of adult mosquitoes was performed during the summer of 2005 in four Wyoming counties bordering neighboring states (Big Horn, Crook, Goshen, and Sweetwater) and in two counties centrally located (Fremont and Natrona). Ten species of Aedes, two Anopheles, two Culiseta and two Culex were collected. The most common species, in order, were Ae. vexans, Cx. tarsalis, Ae. melanimon, Ae. dorsalis, Ae. excrucians, Ae. trivittatus and Cs .inornata . Species that have been recorded in the literature as naturally infected with Dirofilaria immitis included: Ae. vexans (six counties), Ae. trivittatus (5 counties), Ae. excrucians (3 counties), Ae. hendersoni (2 counties), Cx. pipiens (2 counties), and An. Freeborni (1 county). Potential vectors of canine heartworm, especially Ae. vexans, were present at all sites from the end of June until early or mid September.; Elevational preference was determined by placing CO2 baited CDC miniature light traps in the tree canopy (≥ 3 m.) and at ground level (1.5 m.). Significantly greater numbers of Ae. vexans, Ae. dorsalis, Ae. excrucians, A. melanimon, Ae. nigromaculis, Ae. trivittatus, An. earlei, Cs. impatiens, Cx. pipiens , and Cx tarsalis were captured in traps at ground level than in the tree canopy. Aedes s. idahoensis and Cs. Inornata were equally distributed between the two traps. Only Ae. hendersoni and Cs. Impatiens were collected in significantly greater numbers in the tree canopy. The additional numbers collected in the tree canopy would not justify the extra labor involved in collecting.