| Abstract: | Juveniles identified as Dirofilaria immitis were recovered from Aedes trivittatus and Anopheles punctipennis collected CO2-baited CDC light traps in Ames, Iowa, during 10 days in July and August 1975. Ae. trivittatus composed 58.7% of the mosquitoes collected, and D. immitis was recovered from 18 of 393 (4.6%) dissected and from 7 of 31 pools (911 mosquitoes; 0.77%). Approximately 1.0% of the Ae. trivittatus collected harbored infective-stage juveniles, and as many as 27 were recovered from a single mosquito. This is the first report of Ae. trivittatus supporting the development of D. immitis. An. punctipennis was the only other species infected, with 2 of 468 harboring first-stage juveniles. The data suggest that Ae. trivittatus probably is the principal vector of D. immitis in central Iowa. |
