Trypanosoma (Megatrypanum) lainsoni n. sp. from Mesomys hispidus (Rodentia: Echimyidae) in BRA: Trypomastigotes described from experimentally infected laboratory mice

We report the detection, isolation and description of Trypanosoma (Megatrypanum) lainsoni n. sp. from a caviomorph rodent, Mesomys hispidus (Rodentia: Echimyidae), obtained in the Rio Negro region of the state of Amazonas, in northern BRA. Laboratory-bred white mice (Mus musculus) and rats (Rattus r...

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Bibliographic Details
Published in:Parasite
Main Authors: Naiff, Roberto Daibes, Barrett, Toby Vincent
Format: Article in Journal/Newspaper
Language:English
Published: Parasite 2013
Subjects:
Animals
Brasil
Didelphis
Disease Carrier
Hamster
Isolation And Purification
Male
Mouse
Parasitology
Rat
Rhodnius
Rodent
Rodent Disease
Trypanosoma
Trypanosomiasis
Veterinary
Xenarthra
Animal
Cricetinae
Insect Vectors
Mice
Rats
Rodent Diseases
Rodentia
Rattus rattus
Online Access:https://repositorio.inpa.gov.br/handle/1/16029
https://doi.org/10.1051/parasite/2013049
Description
Summary:We report the detection, isolation and description of Trypanosoma (Megatrypanum) lainsoni n. sp. from a caviomorph rodent, Mesomys hispidus (Rodentia: Echimyidae), obtained in the Rio Negro region of the state of Amazonas, in northern BRA. Laboratory-bred white mice (Mus musculus) and rats (Rattus rattus) were inoculated with large numbers of culture forms by intraperitoneal route, and trypomastigotes appeared in their blood 3-8 days post-inoculation. One single epimastigote was also found in Mus musculus. Similar attempts to infect Rattus norvegicus, hamsters (Mesocricetus auratus), the opossum Didelphis marsupialis, the anteater Tamandua tetradactyla and triatomine bugs were unsuccessful, following six months of observations and microscopic examinations of blood films and blood cultures. As we have found no previous record of a Trypanosoma (Megatrypanum) species naturally infecting a member of the family Echimyidae, or any other caviomorph rodent, we conclude that this is the first time such an infection has been reported. The new species is unusual in the subgenus for its infectivity to laboratory mice. © 2013 R.D. Naiff et al., published by EDP Sciences.

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