. A manual of veterinary hygiene. Veterinary hygiene. 448 VETEEINAEY HYGIENE Africa, where it causes 'sleeping sickness,' first seen in Uganda. Some harmless trypanosomata are known to exist as parasites in the blood of some small vertebrates, batra- chians, and fish. Sporozoa.—The coccidias are parasites affecting the cell; they exist in two stages the result of sexual dimorphism. One stage, the Schizogenic is the means by which the organism multiplies within the body for the purpose of. c, /^•^^ Fi£c. 15 -Diagram of the Cycle of Development of H;emoproteus. Scliaudim.)* (After 1, Sporocysts
. A manual of veterinary hygiene. Veterinary hygiene. 448 VETEEINAEY HYGIENE Africa, where it causes 'sleeping sickness,' first seen in Uganda. Some harmless trypanosomata are known to exist as parasites in the blood of some small vertebrates, batra- chians, and fish. Sporozoa.—The coccidias are parasites affecting the cell; they exist in two stages the result of sexual dimorphism. One stage, the Schizogenic is the means by which the organism multiplies within the body for the purpose of. c, /^•^^ Fi£c. 15 -Diagram of the Cycle of Development of H;emoproteus. Scliaudim.)* (After 1, Sporocysts entering the red corpuscle ; 2 to 4 are the scMwgeiiic stages by which the organism multiplies in the body for the further infection of the host. Within the body it never goes beyond Stage 4, and from this infects otiier blood corpuscles as indicated by the arrow. Stages 5 to 11 are sporogcnic, and serve for the reproduction of the species, 5 being the male, 5a the female element, 6 and 6a being the mature cell elements ; these come together at 7, resulting in the formation of an oocyst at 8, and finally the production of a mature sporocyst at 11, which when inoculated into an animal infects the red cell. Stages 5 to 11 take place outside the animal body and within that; of the intermediate host. infecting its host (Fig. 186), the other, or Sporogenic stage, is a true sexual reproduction by male {macrogamet) and female (microgamet) elements, which serves not for the * Dr. F. Dofiein, Die Protozen. Digitized by Microsoft®. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Frederick 1857-1929. New York : W. R. Jenkins
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