Toxorhynchites Species: A Review of Current Knowledge

SIMPLE SUMMARY: Mosquitoes are well known to spread diseases when they take a blood meal. However, not all species feed on blood but instead get their nourishment from other sources. One such species is Toxorhynchites, which are a paradox among mosquitoes. These mosquitoes are entirely non-blood feeding and, as a result, are not considered to be harmful to human health. Indeed, since their larvae feed on the larvae of pest species and other aquatic insects, they are a potential counter measure against the spread of mosquito-transmitted diseases. Their effective application has been hampered due to a lack of understanding and inconsistencies in their descriptions. This review aims to build upon previously published information and summarize recent findings to support their use in combating mosquito-transmitted infections. ABSTRACT: The increasing global incidence of mosquito-borne infections is driving a need for effective control methods. Vector populations have expanded their geographical ranges, while increasing resistance to chemical insecticides and a lack of effective treatments or vaccines has meant that the development of vector control methods is essential in the fight against mosquito-transmitted diseases. This review will focus on Toxorhynchites, a non-hematophagous mosquito genus which is a natural predator of vector species and may be exploited as a biological control agent. Their effectiveness in this role has been strongly debated for many years and early trials have been marred by misinformation and incomplete descriptions. Here, we draw together current knowledge of the general biology of Toxorhynchites and discuss how this updated information will benefit their role in an integrated vector management program.