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EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis
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EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis
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EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis
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EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis
EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis
Journal Article

EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis

2014
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Overview
The administration of viable Bifidobacterium animaliswas tested to induce resistance against Strongyloides venezuelensis infection in mice. Effects on parasite burden, worm length, egg output, and intestinal mucosal histology were evaluated. The oral administration of B. animalis, strain 04450B, starting 14 days before the inoculation of nematode larvae significantly decreased the worm burden and egg output. In probiotic treated animals, the percent reduction of adult worms in the intestine was of 33% and the reduction of egg production was of 21%, compared with those of the control group. The duodenum villous height and villous/crypt ratio were significantly higher in probiotic-treated mice, indicating that this group could be experiencing less intestinal damage. The present findings revealed that the administration of B. animalis for the amelioration of host response to nematode infections is biologically plausible and could have some potential for impacting public health. Meanwhile, further study is needed to delineate the nature and identity of the factor(s) involved in these beneficial effects. Os efeitos da administração de Bifidobacterium animalis viáveis sobre a infecção por Strongyloides venezuelensis foram avaliados em camundongos experimentalmente infectados. Os parâmetros analisados incluíram a carga parasitária, o comprimento dos vermes, a quantidade de ovos eliminados e a histologia da mucosa intestinal. A administração oral da cepa 04450B de B. animalis, iniciada 14 dias antes da inoculação de larvas do nematódeo, foi acompanhada de uma redução significativa do número de vermes que se estabeleceu no intestino e do número de ovos eliminados nas fezes. Nos animais tratados com o probiótico, o percentual de redução de vermes adultos no intestino foi de 33% e da produção de ovos foi de 21%, em comparação com os do grupo controle. O comprimento das vilosidades do duodeno e a relação vilus/cripta foram significativamente maiores nos animais tratados, indicando que nestes animais as lesões intestinais foram mais leves. Os resultados do presente trabalho revelaram que a administração de B. animalis com o propósito de modular a resposta do hospedeiro contra infecções por nematódeos é uma possibilidade biologicamente plausível com impacto potencial em saúde pública. No entanto, são ainda necessários mais estudos para esclarecer os mecanismos de ação destes microrganismos e identificar os fatores envolvidos na produção dos efeitos benéficos.