Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . ivo-autumnal organisms. I, Young hyaline form; 2, hyaUne form with beginning pigmenta-tion; 3, pigmented form; 4, full-grown pigmented form; 5, 6, 7, 8, seg-menting forms; g, mature pigmented form; 10, flagellate form. II, Young hyaline form; 12, 13, pigmented forms; 14, fully devel-oped form; 15, 16, segmenting forms; 17, flagellate form. 18, 19, 20, Ring-like and cross-like hyaline forms; 21, 22, pigmentedforms; 23, 24, segmenting forms; 25, 26, 27, crescents. 204 ESS
Essentials of bacteriology; being a concise and systematic introduction to the study of bacteria and allied microörganisms . ivo-autumnal organisms. I, Young hyaline form; 2, hyaUne form with beginning pigmenta-tion; 3, pigmented form; 4, full-grown pigmented form; 5, 6, 7, 8, seg-menting forms; g, mature pigmented form; 10, flagellate form. II, Young hyaline form; 12, 13, pigmented forms; 14, fully devel-oped form; 15, 16, segmenting forms; 17, flagellate form. 18, 19, 20, Ring-like and cross-like hyaline forms; 21, 22, pigmentedforms; 23, 24, segmenting forms; 25, 26, 27, crescents. 204 ESSENTIALS OF BACTERIOLOGY (2) Wrights Chromatin Stain.—This is the best of thechromatin stains. For its preparation, which is quite com-plicated, see Wright, Journal of Medical Research, vol. vii,1902. It can be purchased already made. It is used asfollows: 1. The stain is poured over the film and allowed to remainfor one minute to secure fixation. 2. Add distUled water drop by drop until a metallic scumis formed on the surface. The staining now takes place andrequires two to three minutes. Wash in distilled water until. Fig. 102.—Pure culture of trypanosomes of mosquitos—Crithidiafasciculata. Multiplication reset showing large and small cells. Nine-day culture (Gen. i X 1500) (Novy, MacNeal, and Torrey). a pinkish tint appears in the thin portions of the smear. Thebody of the malarial parasite is stained blue, and its chromatina lilac to red color. The red cells are orange-pink. If possible, examinations for malarial organisms shouldalways be made before quinin is administered. Trypanosomata.—Trypanosomes are flagellate protozoafound in the blood of various animals, and causing a numberof diseases, such as surra, dourine, and nagana, affectinghorses and cattle, especially in tropical countries, and causing PROTOZOA 205 the sleeping sickness of Africa, which is very fatal for humanbeings. About 60 species have been described, and 10 dis-eases are believed to be due to th
Size: 1700px × 1470px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1913
