Host Specificity of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) with Comments on the Drop-off Rhythm

Memórias do Instituto Oswaldo Cruz

Cristina Marques Lisbôa Lopes²  Romário Cerqueira Leite¹  Marcelo Bahia Labruna¹  Paulo Roberto De Oliveira¹  Lígia Miranda Ferreira Borges¹  Zénon Batista Rodrigues¹  Henrique Ávila De Carvalho¹  Carolina Maria Vianna De Freitas¹  Carlos Roberto Vieira Júnior¹ 

[1] ,Universidade Federal de Minas Gerais

关键词: Amblyomma cajennense;    drop;    off periodicity;    host specificity;   

DOI  :  10.1590/S0074-02761998000300014

来源: SciELO

【 摘 要 】

The parasitic specificity of larval, nymph and adult Amblyomma cajennense on six different host species: Oryctolagus cuniculus, Rattus norvegicus, Gallus gallus domesticus, Anas platyrhynchus, Coturnix coturnix and Streptopelia decorata is described. In terms of the numbers of larvae and nymphs recovered, O. cuniculus was the best host species. The modal day for drop-off of larvae and nymphs was day three for the mammal hosts, but variable in the birds. We conclude that adult A. cajennense have a strong degree of specificity due to the fact that the tick failed to complete its life cycle on any of the evaluated hosts. The immature stages, on the other hand, showed a low level of specificity, most especially in the larval stage, indicating the existence of secondary hosts which probably serve as dispersers in the wild. The results also indicated a variable drop-off rhythm for larvae and nymphs in two periods, diurnal (6-18 hr) and nocturnal (18-6 hr), which differed depending upon the host.

【 授权许可】

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