. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. SCARLET FEVER. 263 nutrient agar-agar, nutrient gelatine, and in brotli, botli at the ordinary and at higher tempei-atures, and also by experiments on animals. They concluded that it conld be stated with certainty that the organi-sms in question did not stand in causal relation to scarlet fever. They considered that special methods of microscopical and biological research were apparently needed for demonstrating the tru
. A text-book of bacteriology, including the etiology and prevention of infective diseases and a short account of yeasts, and moulds, haematazoa, and psorosperms. Bacteriology. SCARLET FEVER. 263 nutrient agar-agar, nutrient gelatine, and in brotli, botli at the ordinary and at higher tempei-atures, and also by experiments on animals. They concluded that it conld be stated with certainty that the organi-sms in question did not stand in causal relation to scarlet fever. They considered that special methods of microscopical and biological research were apparently needed for demonstrating the true scarlet fever contagium, which probably was especially present in the skin. They considered that the presence of the. Fig. 125.—Pure-Cultivatioxs of Streptococcus Pvogenes. (a) On the surface of nutrient gelatine; (i) In the dej^th of nutrient gelatine : {n] On the surface of nutrient agar. streptococcus was due to a secondary infection, to which the dooi' was opened by the lesions of the throat—a view which was sup- ported by the fact that the organisms were found in submaxillary l3rmphatic glands. They pi-eferred to use the term " secondary " to " complicated " oi' " combined " infection, because this expresses the fact that by the effect of the scarlatinal virus the soil is rendered suitable for this ubiquitous microbe when it has once gained an entrance. This streptococcus was found by Klein in five out of eleven cases. 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 Crookshank, Edgar M. (Edgar March), 1858-1928. Philadelphia, W. B. Saunders
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