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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...detected in cultures of the Morgan bacillus. Pathogenesis.--The etiological relationship of the Morgan bacillus to diarrheas is not fully established, although it has been isolated from many cases in which other pathogenic bacteria have not been detected, as well as in association with severe and fatal cases of bacillary dysentery.l The organism is readily isolated from the feces upon the lactose agar medium containing the Andrade indicator. The colonies are colorless and resemble those of the paratyphoid bacilli very closely. The essential points of difference from the other pathogenic intestinal bacilli are shown in the Table on page 317. Little is known of the lesions or immunological reactions of this organism. 1 Kendall, Day and Bagg: Boston Med. and Surg. Jour., 1913, clxix, 741. Kendall: Ibid., 1915, clxxii, 851. CHAPTER XVII. THE COLI-CLOACA-PROTEUS GROUP. BACILLUS COLL Historical.--Bacillus coli was isolated in pure culture from the feces of infants, and its important cultural characters determined by Escherich in 1886.1 It is very probable, as Escherich suggested,2 that Emmerich's B. neapolitanus, Brieger's propionic acid bacillus, and Frankel's bacilli3 are identical with the colon bacillus. Morphology.--Bacillus coli is a rod-shaped organism which varies in shape from oval organisms resembling cocci to bacilli of moderate length. The organism varies in size from 0.5 to 0.8 micron in diameter and from 1 to 3 microns in length. The bacilli occur singly and in pairs; in older cultures short chains and elongated organisms are frequently observed. The ends are distinctly rounded. Motility is variable; many strains are non-motile except during the earlier hours of growth. Young cultures on gelatin are said to exhibit...

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