. Pathogenic micro-organisms. A text-book of microbiology for physicians and students of medicine. (Based upon Williams' Bacteriology). Bacteriology; Pathogenic bacteria. Morphology and classification 165 cycle takes place in a tick, and is in part analogous to that de- scribed for Plasmodium. The stages are not fully known, but the infectivity of the tick is transmitted to the offspring in the case of the Texas-fever tick {Rhipicephalus {Boophilus) annulaius). Nosema.—The sporozoa above described all belong to the Telosporidia, organisms which end their individual existence at. Fig. 83.—Diagr
. Pathogenic micro-organisms. A text-book of microbiology for physicians and students of medicine. (Based upon Williams' Bacteriology). Bacteriology; Pathogenic bacteria. Morphology and classification 165 cycle takes place in a tick, and is in part analogous to that de- scribed for Plasmodium. The stages are not fully known, but the infectivity of the tick is transmitted to the offspring in the case of the Texas-fever tick {Rhipicephalus {Boophilus) annulaius). Nosema.—The sporozoa above described all belong to the Telosporidia, organisms which end their individual existence at. Fig. 83.—Diagram of the developmental cycle of Nosema bombycis. C, Cell of the intestinal epithelium containing asexual multiplication forms and showing their transition into spores, a, b, c. Spores, the last with polar thread, d. Ameboid form emerging from the spore to penetrate a new host cell at k. (From Doflein after Stempell.) the stage of spore formation. A second large subdivision of the sporozoa is named Neosporidia. In this group the spores are formed without terminating the existence of the individual. The parasites of this type are comparatively small and not very well known. They are often spoken of as microsporidia or psorosperms. The best-known form is Nosema bombycis, the cause of Pebrine in 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 MacNeal, Ward J. , 1881-1946; Williams, Herbert Upham, 1866-. Philadelphia, P. Blakiston's Son & Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteri, bookyear1920
