期刊
VETERINARY PARASITOLOGY
卷 209, 期 1-2, 页码 93-100出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.vetpar.2015.02.003
关键词
Heartworm Development Unit; Dirofilaria immitis; Extrinsic incubation period; Daily temperature range; Degree-day; Aedes aegypti
资金
- NIH [T32RR018269]
- USDA National Institute of Food and Agriculture, Hatch project [2010-11-184]
- Novartis Animal Health Laboratory Services Agreement
- NATIONAL CENTER FOR RESEARCH RESOURCES [T32RR018269] Funding Source: NIH RePORTER
We evaluated degree-day predictions of Dirofilaria immitis development (HDU) under constant and fluctuating temperature treatments of equal average daily temperature. Aedes aegypti mosquitoes were infected with D. immitis microfilariae and parasite development was recorded at set time points in dissected mosquitoes. Time to L3 development in Malpighian tubules and detection in mosquito heads was shorter for larvae experiencing a daily regime of 19 +/- 9 degrees C than larvae at constant 19 degrees C; larval development rate in Malpighian tubules was slower in fluctuating regimes maintained above the 14 degrees C developmental threshold than larvae under constant temperatures. We showed that hourly temperature modeling more accurately predicted D. immitis development to infective L3 stage. Development time differed between fluctuating and constant temperature treatments spanning the 14 degrees C development threshold, implicating a physiological basis for these discrepancies. We conclude that average daily temperature models underestimate L3 development-and consequently dog heartworm transmission risk-at colder temperatures, and spatiotemporal models of D. immitis transmission risk should use hourly temperature data when analyzing high daily temperature ranges spanning 14 degrees C. (C) 2015 The Authors. Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据