Abstract
SINCE Graybill and Smith's discovery1 of the transmission of Histomonas meleagridis, the pathogenic protozoon of enterohepatitis (blackhead) of fowl, by the embryonated egg of the nematode Heterakis gallinæ, a good deal of attention has been given to the hyperparasitism of this nematode. Innumerable experiments have shown that feeding embryonated Heterakis eggs to susceptible birds almost invariably results in a fatal infection of Histomonas; but all attempts to demonstrate the actual organism in the egg have proved futile.
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References
Graybill, H. W., and Smith, T., J. Exp. Med., 31, 647 (1920).
Shortt, H. E., and Cooper, W., Trans. Roy. Soc. Trop. Med. and Hyg., 41, 427 (1948).
Kudo, R., J. Parasit., 8, 129 (1921).
Dolfus, R., “Parasites des Helminthes” (1946).
Tyzzer, E., Proc. Amer. Acad. Arts and Sci., 69, 189 (1933).
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DESOWITZ, R. Protozoan Hyperparasitism of Heterakis gallinæ. Nature 165, 1023–1024 (1950). https://doi.org/10.1038/1651023b0
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DOI: https://doi.org/10.1038/1651023b0
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