Bahesia bovis is a deadly disease of cattle resulting in severe economic losses in the vast regions of the world where it is endemic. If reintroduced into the United States, babesiosis would cause significant mortality in the naive cattle population. In order to address the risk to U.S. cattle, it is essential to quantify the transovarial transmission efficiency in adult female Boophilus microplus ticks following acquisition feeding on persistently infected cattle. This study tested the hypothesis that infection rates are the same for larval progeny derived from females fed to repletion during persistent or acute infection. Increasing parasite levels during acute infection correlated with an increasing number of females harboring kinetes detectable in hemolymph (r = 0.9). The percent infected larvae ranged from 0 to 20% when derived from females fed to repletion on persistently infected calves and from 4 to 6% when derived from females fed to repletion during acute parasitemia. There was no significant difference in infection rates of larval progeny, implying that the risk associated with the introduction of either persistently infected or acutely infected cattle is equal. Parasite levels ranged from 2.4 X 10(2) to 1.9 X 10(5) in 3-day-fed larvae derived from females fed to repletion on persistently infected cattle. One group of larvae failed to transmit the parasite, suggesting that a threshold level of parasites must be obtained by larval progeny via transovarial transmission in order for larvae to deliver sufficient parasites to infect a naive host.
机构:
ARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Heekin, Andrew M.
Guerrero, Felix D.
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ARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Guerrero, Felix D.
Bendele, Kylie G.
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ARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Bendele, Kylie G.
Saldivar, Leo
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Univ Texas El Paso, Dept Math, El Paso, TX 79968 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Saldivar, Leo
Scoles, Glen A.
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ARS, USDA, Anim Dis Res Unit, Pullman, WA 99164 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Scoles, Glen A.
Gondro, Cedric
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Univ New England, Inst Genet & Bioinformat, Armidale, NSW 2351, AustraliaARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Gondro, Cedric
Nene, Vishvanath
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ILRI, Nairobi, Kenya
Biosci Eastern & Cent Africa BecA Hub, Nairobi, KenyaARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Nene, Vishvanath
Djikeng, Appolinaire
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ILRI, Nairobi, Kenya
Biosci Eastern & Cent Africa BecA Hub, Nairobi, KenyaARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
Djikeng, Appolinaire
Brayton, Kelly A.
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Washington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USAARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USA
机构:
Washington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USAWashington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA
Bastos, Reginaldo G.
Ueti, Massaro W.
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Washington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USAWashington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA
Ueti, Massaro W.
Guerrero, Felix D.
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ARS, USDA, Knipling Bushland US Livestock Insect Res Lab, Kerrville, TX 78028 USAWashington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA
Guerrero, Felix D.
Knowles, Donald P.
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Washington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA
Washington State Univ, USDA ARS, Anim Dis Res Unit, Pullman, WA 99164 USAWashington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA
Knowles, Donald P.
Scoles, Glen A.
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Washington State Univ, USDA ARS, Anim Dis Res Unit, Pullman, WA 99164 USAWashington State Univ, Dept Vet Microbiol & Pathol, Program Vector Borne Dis, Pullman, WA 99164 USA