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Infectivity, growth, distribution and acetabular attachment of a one-hundred metacercarial cyst inoculum of Echinostoma trivolvis in ICR mice

Published online by Cambridge University Press:  05 June 2009

M.F. Gavet  and
B. Fried
M.F. Gavet
Affiliation:
Department of Biology, Lafayette College, Easton, Pennsylvania 18042, USA
B. Fried*
Affiliation:
Department of Biology, Lafayette College, Easton, Pennsylvania 18042, USA
*
*Author for correspondence.
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Abstract

Female ICR mice, 6–8 weeks old, were exposed to 100 metacercarial cysts/host of Echinostoma trivolvis to determine the effects of this cyst dosage on worm infectivity, distribution, growth and acetabular attachment in the host small intestine, Of 42 exposed mice, 22 were infected 4 to 17 days postinfection (PI) with a mean worm recovery of 11 to 41%. Mean body area of worms increased from about 0.4 mm2 on day 4 PI to about 2.0 mm2 by day 9 PI. No consistent pattern of worm growth was seen beyond day 9. Distribution data showed that worms were found mainly in the anterior part of the small intestines on day 4 PI and then more posteriorly up to day 8 PI. Worm distribution patterns were quite variable beyond day 11 PI. Scanning electron microscopy showed that the acetabulum left a distinct ‘fingerprint’ or acetabular plug on the intestinal mucosa of the host. The ‘fingerprint’ was temporary and disappeared within 1 min after worms were removed from the intestines.

Type
Research Papers
Information
Journal of Helminthology , Volume 68 , Issue 2 , June 1994 , pp. 131 - 134
Copyright
Copyright © Cambridge University Press 1994

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References

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