Natural Schistosoma mansoni infection in Nectomys squamipes: histopathological and morphometric analysis in comparison to experimentally infected N. squamipes and C3H/He mice
Mem. Inst. Oswaldo Cruz
;
97(suppl.1): 129-142, Oct. 2002. ilus, tab
Artículo
en Inglés
| LILACS
| ID: lil-325021
ABSTRACT
Histopathologic and morphometric (area, perimeter, major and minor diameters) analysis of hepatic granulomas isolated from twelve naturally infected Nectomys squamipes were compared to four experimentally infected ones and six C3H/He mice. Liver paraffin sections were stained for cells and extracellular matrix. Both groups of N. squamipes presented peculiar granulomas consisting predominantly of large macrophages, full of schistosome pigment, characterizing an exudative-macrophage granuloma type, smaller than the equivalent granuloma type in mouse. Naturally infected animals exhibited granulomas in different stages of development, including large number of involutional types. Morphometric analysis showed that all measurements were smaller in naturally infected animals than in other groups. The results demonstrated that both N. squamipes groups reproduced, with small variations, the hepatic granuloma aspects already described in cricetidium (Calomys callosus), showing a genetic tendency to set up strong macrophage responses and small granulomas. Unexpectedly, natural infection did not engender distinguished histopathological characteristics distinct from those derived from experimental single infection, showing changes predominantly secondary to the duration of infection. It appears that the variability of the inocula (and the number of infections?) interfere more with the quantity than with the quality of the pathological changes, denoting some morpho-functional determinism in the response to schistosomal infection dependent on the animal species
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Enfermedades de los Roedores
/
Esquistosomiasis mansoni
/
Parasitosis Hepáticas
/
Ratones Endogámicos C3H
Límite:
Animales
Idioma:
Inglés
Revista:
Mem. Inst. Oswaldo Cruz
Asunto de la revista:
Medicina Tropical
/
Parasitología
Año:
2002
Tipo del documento:
Artículo
/
Congreso y conferencia
País de afiliación:
Brasil
Institución/País de afiliación:
Fiocruz/BR
/
Universidade do Estado do Rio de Janeiro/BR
Similares
MEDLINE
...
LILACS
LIS