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

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....

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Bibliographic Details
Published in:Parasitology 2003-05, Vol.126 (5), p.461-464
Main Authors: THEODOROPOULOS, G., STYLIARA, M., PETRAKOS, M., KAPEL, C. M. O.
Format: Article
Language:English
Subjects:
Animals
bile
Bile - chemistry
Biological and medical sciences
Carnivores
Chickens - physiology
Foxes - physiology
Fundamental and applied biological sciences. Psychology
Host parasite relation
pathogenicity
Invertebrates
Larva - physiology
Larvae
Muscle, Skeletal - parasitology
Nemathelminthia. Plathelmintha
rats
Rats - parasitology
Sheep, Domestic - physiology
Swine - physiology
Trichinella - physiology
Trichinella nativa
Trichinella nelsoni
Trichinella spiralis
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Summary: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.
ISSN:0031-1820
1469-8161
DOI:10.1017/S003118200300307X