Ivermectin Treatment for Cattle Reduced the Survival of Two Malaria Vectors, Anopheles Dirus and Anopheles Epiroticus, under Laboratory Conditions in Central Vietnam

Estee Y. Cramer,Nguyen Xuan Quang,Jeffrey C. Hertz,Do Van Nguyen,Huynh Hong Quang,Ian Mendenhall,Andrew A. Lover

American Journal of Tropical Medicine and Hygiene（2021）SCI 4区SCI 3区

Univ Massachusetts | Minist Hlth | US Naval Med Res Unit TWO | Duke NUS Med Sch

Cited 6|Views14

Abstract

Ivermectin is a low-cost and nontoxic mosquitocide that may have a role in malaria elimination. However, the extent to which this drug impacts the mortality of Anopheles dirus and Anopheles epiroticus, two important malaria vectors in Southeast Asia, is unknown. This study compared and quantified anopheline mortality after feeding on ivermectin-treated cattle and control cattle in Vietnam. Local anopheline colonies fed on cattle 1 to 3, 6 to 8, 13 to 15, 20 to 22, and 28 to 30 days after injection (DAI) with ivermectin (intervention) or saline (control). An. dirus that fed on ivermectin-treated cattle had higher mortality rates than controls for up to 20 DAI (P < 0.05); An. epiroticus that fed on ivermectin-treated cattle had consistently higher mortality rates than controls for up to 8 DAI (P < 0.05). Feeding on ivermectin-treated cattle increased the mortality rate of these vector species for biologically relevant time periods. Therefore, ivermectin has the potential to become an important tool for integrated vector management.

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