scholarly journals Hepatic capillariasis in two captive Callithrix penicillata

Author(s):  
Washington Luiz Assunção Pereira ◽  
Raimundo Nonato Moraes Benigno ◽  
Klena Sarges Marruaz da Silva ◽  
Marcella Katheryne Marques Bernal ◽  
Lucien Roberta Valente Miranda de Aguirra

O presente trabalho relata a ocorrência de dois casos de capilariose hepática em primatas não-humanos da espécie Callithrix penicilatta mantidos em cativeiro. O caso 1 era uma fêmea jovem, que exibiu fígado de cor pálida, suavizada devido a autólise e algumas áreas múltiplas visivelmente esbranquiçadas. O caso 2 foi registrado em um macho adulto, de idade desconhecida, com fígado levemente pálido e acastanhado. A análise histológica das amostras revelou extensa fibrose intersticial com áreas de hemossiderose, exemplares de Capillaria hepatica adultos e numerosos ovos morfologicamente caracterizados pela sua forma elipsóide, não-embrionárias, com tampões bipolares que se sobressaem da casca, que é espessa, birrefringente e com uma camada porosa, dando uma aparência estriada ao ovo. Algumas formações císticas continham ovos do nematóide cercados por numerosas células gigantes do tipo corpo estranho. A literatura consultada possui poucas referências acerca da presença de Capillaria hepatica em primatas não-humanos. No entanto, infecções semelhantes são bem estudadas em roedores domésticos.

2000 ◽  
Vol 12 (5) ◽  
pp. 463-465 ◽  
Author(s):  
Amir N. Hamir ◽  
Charles E. Rupprecht

Tissues of 53 adult porcupines ( Erethizon dorsatum) from Pennsylvania were obtained for histopathologic examination. Hepatic capillariasis was recorded in 9% of the porcupines. An additional 11% of the liver sections showed lesions that were compatible with migration by Capillaria hepatica. Because only 1 section of the liver per animal was examined microscopically, the documented prevalence of C. hepatica in Pennsylvania is considered conservatively low. However, this condition was subclinical, because none of the infected animals showed clinical signs, and none revealed severe pathologic changes in the affected livers. This seems to be the only report of C. hepatica in porcupines.


2001 ◽  
Vol 79 (4) ◽  
pp. 554-561 ◽  
Author(s):  
Shawn Meagher ◽  
Timothy P O'Connor

The effects of parasites on their hosts can vary among host populations, but few studies have examined geographic variation in host-parasite interactions. We examined the effects of Capillaria hepatica (Nematoda) infection on deer mice (Peromyscus maniculatus gracilis) from two different populations. Specifically, we measured the basal metabolic rate (BMR), cold-stress maximum oxygen consumption (MRpeak), metabolic scope (MRpeak/BMR), and thermogenic endurance of infected and uninfected mice from one population with, and a second population without, a history with C. hepatica. Infection had no effect on BMR, but did have effects on cold-stress measures. A previous study documented a significant relationship between survival and MRpeak in wild deer mice; hence, the effects of infection on the parameters that we measured could influence fitness. Only mice that had no historical association with C. hepatica displayed negative consequences of infection, which suggests that the historical host population has evolved mechanisms to cope with infection. Models of the evolution of virulence should include evolutionary responses of both hosts and parasites, particularly when systems involve macroparasites that have long generation times.


2001 ◽  
Vol 96 (7) ◽  
pp. 1001-1003 ◽  
Author(s):  
Roseli Fernandes Oliveira ◽  
Zilton A Andrade
Keyword(s):  

1996 ◽  
Vol 63 (5) ◽  
pp. 698-700 ◽  
Author(s):  
Hema Govil ◽  
Meena Desai
Keyword(s):  

2008 ◽  
pp. 365-379 ◽  
Author(s):  
David M. Spratt ◽  
Grant R. Singleton

1991 ◽  
pp. 97-98
Author(s):  
R. Ringelmann ◽  
Beate Heym
Keyword(s):  

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