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Observations on the feeding behaviour of parasitic third-stage hookworm larvae

Published online by Cambridge University Press:  06 April 2009

J. M. Hawdon ,
S. W. Volk ,
R. Rose ,
D. I. Pritchard ,
J. M. Behnke  and
G. A. Schad
J. M. Hawdon
Affiliation:
Department of Pathobiology, University of Pennsylvania, Philadelphia, PA, USA
S. W. Volk
Affiliation:
Department of Pathobiology, University of Pennsylvania, Philadelphia, PA, USA
R. Rose
Affiliation:
Department of Zoology, University of Nottingham, Nottingham, UK
D. I. Pritchard
Affiliation:
Department of Zoology, University of Nottingham, Nottingham, UK
J. M. Behnke
Affiliation:
Department of Zoology, University of Nottingham, Nottingham, UK
G. A. Schad
Affiliation:
Department of Pathobiology, University of Pennsylvania, Philadelphia, PA, USA
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Summary

The feeding behaviour of parasitic 3rd-stage larvae (L3) of the hookworms Ancylostoma caninum, A. ceylanicum and Necator americanus was examined. Less than 11% of A. caninum L3 recovered from the small intestines of dogs infected orally were feeding at 4–48 h post-infection (p.i.). and none of the A. ceylanicum L3 recovered from the intestines of orally infected hamsters had resumed feeding. All L4 of both species recovered at 36 and 48 h p.i. had resumed feeding. On the other hand, approximately 16% of the A. ceylanicum L3 recovered from the skin of percutaneously infected hamsters at 18 h were feeding, and the percentage feeding increased to nearly 58% at 44 h p.i. Necator americanus L3 recovered from the skin of percutaneously infected neonatal hamsters resumed feeding at 6–12 h p.i. and reached 90–94% by 18 h. Feeding began to decline at 66 h, and reached 29% at 120 h p.i. This decrease was associated with the migration of larvae from the skin to the lungs. By 192 h p.i. over 95% of the larvae had reached the small intestine, and all had moulted to the L4. The results indicate that parasitic L3 resume feeding in the skin during percutaneous infections, and suggest that feeding by hookworm L3 correlates with the resumption of development.

Keywords

Ancylostoma caninumAncylostoma ceylanicumNecator americanushookwormsresumption of developmentin vitro feeding
Type
Research Article
Information
Parasitology , Volume 106 , Issue 2 , February 1993 , pp. 163 - 169
Copyright
Copyright © Cambridge University Press 1993

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