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Effect of fox, pig, sheep, and poultry bile on the establishment of domestic and sylvatic species of Trichinella in rats

Published online by Cambridge University Press:  07 May 2003

G. THEODOROPOULOS ,
M. STYLIARA ,
M. PETRAKOS  and
C. M. O. KAPEL
G. THEODOROPOULOS
Affiliation:
Department of Anatomy and Physiology of Farm Animals, Faculty of Animal Science, Agricultural University of Athens, 75 Iera Odos,Votanikos, Athens 11855, Greece
M. STYLIARA
Affiliation:
Department of Anatomy and Physiology of Farm Animals, Faculty of Animal Science, Agricultural University of Athens, 75 Iera Odos,Votanikos, Athens 11855, Greece
M. PETRAKOS
Affiliation:
Department of Anatomy and Physiology of Farm Animals, Faculty of Animal Science, Agricultural University of Athens, 75 Iera Odos,Votanikos, Athens 11855, Greece
C. M. O. KAPEL
Affiliation:
Danish Centre for Experimental Parasitology, The Royal Veterinary and Agricultural University, Dyrlaegevej 100, DK-1870 Frederiksberg C, Denmark
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Abstract

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Most sylvatic species of Trichinella are known to have poor infectivity to rats, but in the present study oral administration of bile from other hosts appeared to modify this infectivity. A total of 75 rats were inoculated in groups of 25 with 3 species of Trichinella (T. spiralis, T. nativa, and T. nelsoni) and each group of rats was given per os daily doses of bile from pig, sheep, chicken and fox respectively (4×5 rats). As a control 1 group of 5 rats was given daily doses of water. Whereas, the addition of bile did not increase the establishment of T. spiralis, fox bile had a significant positive effect on the establishment of muscle larvae of T. nativa and T. nelsoni. Addition of bile to cultures of the same Trichinella species had an overall negative effect on the in vitro survival of larvae. The present observation that carnivore bile favours the establishment of sylvatic Trichinella may explain why carnivores are equally receptive to all Trichinella species.

Keywords

Trichinella spiralisTrichinella nativaTrichinella nelsonibilerats
Type
Research Article
Information
Parasitology , Volume 126 , Issue 5 , May 2003 , pp. 461 - 464
Copyright
2003 Cambridge University Press