Intensive trapping of blood-fed Anopheles darlingi in Amazonian Peru reveals unexpectedly high proportions of avian blood-meals.

摘要: Anopheles darlingi, the main malaria vector in Neotropics, has been considered to be highly anthropophilic. However, many behavioral aspects of this species remain unknown, such as range blood-meal sources. Barrier screens were used collect resting darlingi mosquitoes from 2013 2015 three riverine localities (Lupuna, Cahuide and Santa Emilia) Amazonian Peru. Overall, Human Blood Index (HBI) ranged 0.58–0.87, with no significant variation among years or sites. Blood-meal analysis revealed that humans are most common blood source, followed by avian hosts (Galliformes-chickens turkeys), human/Galliforme mixed-meals. The Forage Ratio Selection both show a strong preference for Galliformes over blood-fed mosquitoes. Our data 30% An. fed on more than one host, including combinations dogs, pigs, goats rats. There appears pattern host choice varying proportions feeding only humans, some taking mixed-meals (human plus Galliforme), which was detected sites different years, indicating there could structure these populations based blood-feeding preferences. Mosquito age, estimated two localities, Lupuna Cahuide, widely between years. This may reflect local environmental factors influence longevity possibly potential changes ability mosquito transmit parasite. Of 6,204 tested Plasmodium infection, 0.42% infected P. vivax. study provides evidence first time usefulness barrier collection calculate other sources neotropical endemic setting.