. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. The Human Malarial Parasites 509 there are no regularly occurring paroxysms. The duration of the asexual cycle is from twenty-four to forty-eight hours. The gametocytes are striking and characteristic oviod and cres- centic bodies^—crescents—1}4 times the diameter of a red blood- corpuscle in length, and about half the diameter of the corpuscle ©O £' ITo Fig. 1^7.—Parasite of estivo-autumnal fever: a, b, c, Ring-like and cross- like hyaline forms; d, e,
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. The Human Malarial Parasites 509 there are no regularly occurring paroxysms. The duration of the asexual cycle is from twenty-four to forty-eight hours. The gametocytes are striking and characteristic oviod and cres- centic bodies^—crescents—1}4 times the diameter of a red blood- corpuscle in length, and about half the diameter of the corpuscle ©O £' ITo Fig. 1^7.—Parasite of estivo-autumnal fever: a, b, c, Ring-like and cross- like hyaline forms; d, e, pigmented forms;/, g, segmentary forms; h, i,j, crescents. in breadth. The ends color more intensely with methylene blue than the middle portion, and the bacillary pigment granules are collected toward the centers. The longer and more slender crescents are usually bent, and the relic of the corpuscle in which they have formed can often be seen forming a line connecting the ends on the concave side. These are the microgametocytes or male Fig. 188. Fig. 18 Figs. 188, 189.—Gametocytes of Plasmodium falciparum: 91, The microga- metocyte; 92, the macrogametocyte (KoUe and Wassermann). The macrogametocytes are broader, not curved, and sometimes are ovoidal or prolate spheriodal in shape. The pigment granules are more widely scattered throughout the substance. The cres- cents are most numerous after the fever has lasted for some time or in recurrences of the fever. The life duration of a crescent is about three weeks. The fever in this form of malarial infection may be intermittent. 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 McFarland, Joseph, 1868-. Philadelphia and London, W. B. Saunders Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1919
