. A text-book of bacteriology. Bacteriology. PATHOGENIC SPIRILLA. 593 Inoculations into cliickens and pigeons were without result ; in one chicken the spirilla were found in the blood on the fourth day after inocula- tion, but the fowl recovered. SPIRILLUM CHOLERA ASIATICS. Synonyms.âSpiAWum. ("bacillus") of cholera; Comma bacillus of Koch; Kommabacillus der Cholera Asiatica ; Bacille-virgule cholerigene. Discovered by Koch (1884) in the excreta of cholera patients and in the contents of the intestine of recent cadavers. The researches of Koch, made in Egypt and in India (1884), and
. A text-book of bacteriology. Bacteriology. PATHOGENIC SPIRILLA. 593 Inoculations into cliickens and pigeons were without result ; in one chicken the spirilla were found in the blood on the fourth day after inocula- tion, but the fowl recovered. SPIRILLUM CHOLERA ASIATICS. Synonyms.âSpiAWum. ("bacillus") of cholera; Comma bacillus of Koch; Kommabacillus der Cholera Asiatica ; Bacille-virgule cholerigene. Discovered by Koch (1884) in the excreta of cholera patients and in the contents of the intestine of recent cadavers. The researches of Koch, made in Egypt and in India (1884), and subsequent researches by bacteriologists in various parts of the world, show that this spirillumâso-called " comma bacillus"âis con- stantly present in the contents of the intestine of cholera patients during the height of the disease, and that it is not found ia the con- tents of the intestine of healthy persons or of those suffering from \.-» %/t* ' >. .JvW J:.< Fia. 172. â Fig. 173. FIG. 172. Fig. 173. -Spirillum cholersB Asiaticae. X 1,000. From a photomicrograph. CKoch.) -Spirillum cholerae Asiaticae, involuticJ forms. X 700. (Van Ermengem.) other diseases than cholera. The etiological relation of this spiril- lum to Asiatic cholera is now generally admitted by bacteriologists. Morphology.âSlightly curved rods with rounded ends, from to 2 /tin length and about to ;in breadth. The rods are usually but slightly curved, like a comma, but are occasionally in the form of a half-circle, or two united rods curved in opposite directions may form an S-shaped figure. Under certain circum- stances the curved rods grow out into long, spiral filaments, which may consist of numerous spiral turns, and in hanging-drop cultures the S-shaped figures may also be seen to form the commencement of a spiral; in stained preparations the spiral character of the long filaments is often obliterated, or nearly so. When development is very rapid the short, curved
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbacteri, bookyear1901
