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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 98, No. 1, 2003, pp. 45-49
Bioline Code: oc03037
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 98, No. 1, 2003, pp. 45-49

 en Interrelationship between Ectoparasites and Wild Rodents from Northeastern Buenos Aires Province, Argentina
Santiago Nava; Marcela Lareschi & Damián Voglino

Abstract

Infestation parameters and indices of mites, ticks and fleas associated with wild rodents from northeastern Buenos Aires Province, Argentina, were studied. Host species similarity was also analyzed in relation to their ectoparasites. Fifty-five rodents were captured from January 2000 to March 2001. In total, 1,022 ectoparasites were collected and three ectoparasite-host associations were new records. However, this is the first study on Craneopsylla minerva wolffhuegeli check for this species in other resources infesting parameters. Ectoparasite total mean abundance and total prevalence were higher in Holochilus brasiliensis check for this species in other resources (MA = 47.7; P = 100%) and Scapteromys aquaticus check for this species in other resources (MA = 25.4; P = 95.4%), meanwhile specific richness and diversity were higher in Oligoryzomys flavescens check for this species in other resources (S = 6; H = 1.3) and Akodon azarae check for this species in other resources (S = 4; H = 1.0). On the other hand, the only individual of Calomys laucha check for this species in other resources was not parasited. S. aquaticus-H. brasiliensis, which preferred similar microhabitats, shared the same ectoparasite species (Css = 100). Whereas, A. azarae, which was mostly associated with grassland, showed the highest difference with the other hosts (Css < 0.4). Considering every ectoparasite species, H. brasiliensis showed the highest mean abundance, prevalence and preference. The results suggest that the particular characteristics of this rodent would give it better possibilities not only of being infested by ectoparasites, but also of transmitting them to its progeny.

Keywords
ectoparasites - fleas - mites - ticks - wild rodents - Argentina

 
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