Infection of different strains of mice with Lawsonia intracellularis derived from rabbit or porcine proliferative enteropathy.
J Comp Pathol
; 139(1): 8-15, 2008 Jul.
Article
em En
| MEDLINE
| ID: mdl-18479698
ABSTRACT
This report describes intestinal lesions in five strains of mice infected orally with Lawsonia intracellularis-infected tissue homogenates from rabbits or pigs (RLI and PLI). BALB/cA, C3H/HeJ, C57BL/6J and ICR mice were susceptible to infection with RLI, whereas only C3H/HeJ, C57BL/6J and ICR strains were susceptible to PLI. In susceptible mice, crypt epithelial hyperplasia occurred in association with an inflammatory reaction, as in proliferative enteropathy (PE) in other species. The intestinal changes in the infected mice varied from mild to severe. Unlike rabbit or porcine PE, in which the changes are confined to the ileum, the lesions in mice were located in the caecum. Immunolabelling of L. intracellularis antigen was abundant in early infection when the epithelial hyperplasia was mild or absent. When the hyperplasia had become severe, however, immunolabelling was weak. For this reason, it is suggested that transitory infection of the epithelium induces epithelial hyperplasia. Genetic differences between mouse strains appeared to play an important role in the response to L. intracellularis infection. Moreover, the susceptibility of BALB/cA mice to RLI but not to PLI suggests that there are significant biological differences between L. intracellularis isolates from rabbit PE and porcine PE.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Coelhos
/
Doenças dos Suínos
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Lawsonia (Bactéria)
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Infecções por Desulfovibrionaceae
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Enteropatias
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Camundongos Endogâmicos
Limite:
Animals
Idioma:
En
Revista:
J Comp Pathol
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Japão