Hypersensitivity induced in dogs by nymphal extract of Amblyomma cajennense ticks (Acari:Ixodidae)
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New York Acad Sciences
Wiley
Wiley
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Resumo
In general, hosts develop resistance to ticks after repeated infestations; nevertheless, several studies on naturally occurring host-tick interactions were unable to detect resistance of hosts to ticks even after repeated infestations. The purpose of this investigation was to study the type of cutaneous hypersensitivity to unfed nymphal extract of A. cajennense in dogs, which, unlike guinea pigs, do not develop resistance. A first, but no second, peak in skin reaction was observed, suggesting that cellular immunity is an important mechanism of resistance to ticks. This may partially explain why guinea pigs, but not dogs, develop resistance against ticks.
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Amblyomma cajennense Rickettsia rickettsii Tick infestations Animal experiment Animal model Arthropod Cellular immunity Conference paper Controlled study Dog Extract Guinea pig Host parasite interaction Host resistance Hypersensitivity Infestation Nonhuman Recurrent disease Skin manifestation Tick Animals Arachnid Vectors Dog Diseases Dogs Guinea Pigs Host-Parasite Relations Hypersensitivity, Delayed Immunity, Cellular Immunity, Natural Ixodidae Species Specificity Tick Infestations Acari Amblyomma Animalia Arachnida Arthropoda Canis familiaris Cavia Cavia porcellus Hexapoda Rickettsia Sus scrofa
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Inglês
Citação
Annals of the New York Academy of Sciences, v. 969, p. 184-186.
