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Experimental infection and adaptation of Rodentolepis nana to the Mongolian jird Meriones unguiculatus

Published online by Cambridge University Press:  01 December 2007

Gustavo José Caldas Vianna  and
Alan Lane de Melo
Gustavo José Caldas Vianna
Affiliation:
Laboratório de Taxonomia e Biologia de Invertebrados, Departamento de Parasitologia, Universidade Federal de Minas Gerais, PO Box 486, Belo Horizonte, Minas Gerais, 30123-970, Brazil
Alan Lane de Melo*
Affiliation:
Laboratório de Taxonomia e Biologia de Invertebrados, Departamento de Parasitologia, Universidade Federal de Minas Gerais, PO Box 486, Belo Horizonte, Minas Gerais, 30123-970, Brazil
*
*Fax: (+55-31) 3499 2970, E-mail:aldemelo@icb.ufmg.br
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Abstract

A mouse-derived strain of Rodentolepis ( = Hymenolepis) nana was transferred to the Mongolian jird Meriones unguiculatus. It was found that M. unguiculatus has low susceptibility to R. nana mouse isolates. Likewise, adaptation of the parasite to jird hosts, in the absence of dexamethasone treatment, was not demonstrable, at least during ten-passage trials. Nevertheless, the parasite was able to establish, grow and develop to gravid adults in M. unguiculatus treated daily with dexamethasone. Prepatent periods in dexamethasone-treated jirds in ten-passage series ranged from 10 to 17 days post-infection (DPI), the average being 12 days, and the patent periods lasted from 18 to 30 DPI, with an average of 25 days. The population pattern of faecal egg output in immunosuppressed jirds suggests that under a daily dexamethasone treatment protocol, the parasite is able to maintain egg production as long as treatment is sustained.

Type
Research Papers
Information
Journal of Helminthology , Volume 81 , Issue 4 , December 2007 , pp. 345 - 349
Copyright
Copyright © Cambridge University Press 2007

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