Please use this identifier to cite or link to this item: http://www.arca.fiocruz.br/handle/icict/9716
Title: The first description of eggs in the male reproductive system of Physaloptera bispiculata (Nematoda: Spiruroidaea).
Authors: Menezes, Aleksandra Oliveira
Rangel, Adriana Lanfredi
Lanfredi, Reinalda Marisa
Affilliation: Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Laboratório de Biologia de Helmintos Otto Wucherer. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Laboratório de Biologia de Protozoários e Unidade de Microscopia Eletrônica. Salvador, BA, Brasil
Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Laboratório de Biologia de Helmintos Otto Wucherer. Rio de Janeiro, RJ, Brasil
Abstract: Physaloptera bispiculata (Nematoda: Spiruroidaea) is a parasite of Nectomys squamipes (Rodentia: Cricetidae), a water rat that only occurs in Brazil. Naturally infected rodents were captured in the municipality of Rio Bonito, Rio de Janeiro, Brazil. Adult P. bispiculata worms were collected, prepared and analysed by light and scanning electron microscopy. Under scanning electron microscopy, several eggs were seen glued by cement to the cloacal aperture. Light microscopy revealed that some male worms had an uncountable number of embryonated eggs in the ejaculatory duct, cloaca and also in the posterior portion of the intestine. The probable explanation is that the eggs developing in the female uterus are pumped by the female or sucked by the male to the cloacal opening and from this point to the intestine and ejaculatory duct. The male probably does not have the ability to expel the eggs and for this reason a large number were found in these organs. On the other hand, this could be an important adaptation for the parasite, i.e. male worms expelled by the host can carry a large number of eggs and spread them to intermediate hosts when ingested by these hosts. As far as we know this is the first record of a physalopterid nematode harbouring eggs in the cloacal region, ejaculatory duct or intestine.
DeCS: Genitália Masculina/anatomia & histologia
Spiruroidea/anatomia & histologia
Zigoto/citologia
Animais
Brasil
Masculino
Feminino
Microscopia
Sigmodontinae/parasitologia
Issue Date: 2011
Publisher: Cambridge University Press
Citation: OLIVEIRA-MENEZES, A.; LANFREDI-RANGEL, A. LANFREDI, R. M. The first description of eggs in the male reproductive system of Physaloptera bispiculata (Nematoda: Spiruroidaea). Journal of Helminthology, v. 85, n. 2, p. 142-145, 2011.
DOI: 10.1017/S0022149X10000374
ISSN: 1475-2697
Copyright: open access
Appears in Collections:IGM - Artigos de Periódicos

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