Mycology of the Mouth; A Text-Book of Oral Bacteria (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...is that of the body. Pathogenesis.--Eabbits and guinea-pigs often die when injected intravenously with cultures of the influenza bacillus, the chief symptoms, according to Pfeiffer, being a great rise of temperature, with subsequent paralysis of the hind limbs. Deline and Kole found that they could not produce immunity by the inoculation of gradually increasing doses of the bacillus, as is the case with many other bacteria (c/. diphtheria). A certain amount of temporary immunity resulted iu Deline and Kole's experiment, but the animals were never capable of resisting large doses, and no true resistance was developed. This experimental fact is interesting in relation to the clinical fact of the absence of protection afforded by an attack of the disease, the susceptibility to a second attack being rather increased. It is probable, however, that after a large number of attacks some slight immunity may be set up, as the disease appears to gradually become less and less severe in type. (10) B. PYOCYANEUS. (Pseudomonas Pyocyanea Migula.) This organism is found in abscesses when the contents are of the peculiar bluish or green colour known as " blue pus." It occurs occasionally in the mouth and throat, and may be found at times in the cavities of tubercular lungs, in otitis media, meningitis, &c. It is not uncommon in dust. On agar cultures especially this organism produces well marked crystals. One of the most characteristic appearances associated with this organism is the green-blue pigment that is formed on most media. Gessard has shown that this pigment is composed of at least two different bodies (fluorescin and pyocyanin), and that by modifying the conditions under which the organism is grown it may be made to produce one or other at will. Morp...