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Intestinal Colonisation with Different Rabbit EnteropathogenicEscherichia coliBiotypes and Cross-Protection Induced by Different Strains

Lieve Okerman, Luc A. Devriese

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Abstract

Experimental infections with four different rabbit enteropathogenic Escherichia coli (EPEC) biotypes were carried out in EPEC free rabbits, and intestinal colonisation was assessed by measuring semi-quantitatively the rectal colonisation. When the animals were infected for the first time shortly after weaning, the excretion followed an approximately identical course with all four EPEC: at 3-9 d post-infection all rabbits excreted the infecting EPEC strain in high quantities, and continued to do so for 1-2 wks. Rabbits that had survived such a colonisation with one EPEC, were protected against colonisation with strains belonging to other EPEC groups. Keywords: E. coli ; Rabbit EPEC; Intestinal colonisation; Cross-protection.

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What this paper is about

Experimental infections with four different rabbit enteropathogenic Escherichia coli (EPEC) biotypes were carried out in EPEC free rabbits, and intestinal colonisation was assessed by measuring semi-quantitatively the rectal colonisation. When the animals were infected for the first time shortly after weaning, the excretion followed an approximately identical course with all four EPEC: at 3-9 d post-infection all rabbits excreted the infecting EPEC strain in high quantities, and continued to do so for 1-2 wks. Rabbits that had survived such a colonisation with one EPEC, were protected against colonisation with strains belonging to other EPEC groups. Keywords: E. coli ; Rabbit EPEC; Intestinal colonisation; Cross-protection.

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Available abstract

Experimental infections with four different rabbit enteropathogenic Escherichia coli (EPEC) biotypes were carried out in EPEC free rabbits, and intestinal colonisation was assessed by measuring semi-quantitatively the rectal colonisation. When the animals were infected for the first time shortly after weaning, the excretion followed an approximately identical course with all four EPEC: at 3-9 d post-infection all rabbits excreted the infecting EPEC strain in high quantities, and continued to do so for 1-2 wks. Rabbits that had survived such a colonisation with one EPEC, were protected against colonisation with strains belonging to other EPEC groups. Keywords: E. coli ; Rabbit EPEC; Intestinal colonisation; Cross-protection.

Key concepts: Colonisation, Enteropathogenic Escherichia coli, Microbiology, Biology, Feces, Escherichia coli, Weaning, Colonization

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