Abstract
1. The life cycle of Trypanosoma avium in both its hosts is described.2. In the vector (Ornithomyia avicularia) it undergoes a cyclical development in the alimentary canal. Multiplication occurs while the flagellate is in the crithi-dial stage, and, finally, pyriform haptomonad crithidia appear in the insect's hind-gut: these change into the infective metacyclic trypanosomes.3. After penetrating the mucous membranes of the bird (following its ingestion of the louse-fly), the metacyclic trypanosomes probably invade the lymph system, and there develop (by growth alone) into the large forms seen in the bird's blood some 18–24 hr. later.4. The trypanosomes persist in their natural hosts (but not in canaries) throughout the winter, more-or-less restricted to the bone-marrow. In the spring they reappear in the peripheral blood.
Publisher
Cambridge University Press (CUP)
Subject
Infectious Diseases,Animal Science and Zoology,Parasitology
Reference18 articles.
1. Observations on the Defense Mechanism in Trypanosoma Equiperdum and Trypano Some Lewisi Infections in Guinea Pigs and Rats
2. Recherches morphologiques et expérimentales sur Trypanosoma paddae (Laveran et Mesnil);Thiroux;Ann. Inst. Pasteur,1905
3. Die neueren Ergebnisse der Haemoproteus-Forschung. Zugleich vor-läufige Mitteilung über das Kreuzschnabel-trypanosoma und über Züchtungsversuche an einigen anderen Trypanosomen;Nöller;Arch. Protistenk.,1920
4. Hémamibes des oiseaux et moustiques. ‘Générations alternantes’ de Schaudinn;Sergent;C.R. Soc. Biol., Paris,1905
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