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Observations on the tissue and post-tissue larval development of Ascaridia dissimilis Vigeuras 1931, and a comparison with that of Ascaridia galli, in turkeys

Published online by Cambridge University Press:  06 April 2009

C. Horton-Smith ,
P. L. Long  and
D. L. Lee
C. Horton-Smith
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon
P. L. Long
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon
D. L. Lee
Affiliation:
Houghton Poultry Research Station, Houghton, Huntingdon
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Extract

A tissue phase of the nematode A. dissimilis has been demonstrated. The larvae enter the tissue soon after hatching and not, as previously thought, after 7 days.

The growth rate of A. dissimilis in young poults has been studied. Sexual differentiation can be observed from the 14th day and sexual maturity occurs as early as 28 days after infection.

From the recorded figures it is evident that A. dissimilis is not necessarily a smaller species than A. galli. The age of the host influences the development of maturity of the worms and probably the size of the nematodes as well. The largest female recorded here was 128 mm and the largest male was 77 mm when removed from a turkey 76 days after infection.

The infectivity of A. dissimilis ova is not impaired after storage at room temperature in 1 % formalin for up to 237 days. Embryonation is complete in 9–10 days at 30 °C.

It has been shown that chickens are probably refractory to A. dissimilis.

We wish to acknowledge the technical assistance of Mr J. Brownbill, Mrs B. Fisher and Mr P. R. Mills.

Type
Research Article
Information
Parasitology , Volume 58 , Issue 3 , August 1968 , pp. 709 - 714
Copyright
Copyright © Cambridge University Press 1968

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References

REFERENCES

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