. 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. 470 INFECTIVE DISEASES. Oheyne investigated foul-brood, isolated the bacillus, and fully described its morphological and biological characters in nutrient media. By removing the cap of one of the diseased cells, the de- composing larva can be withdrawn, and cover-glass preparations will reveal delicate bacilli and large oval spores. The bacilli can be readily isolated and cultivated in nutrient M gelatine. Fig. -S
. 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. 470 INFECTIVE DISEASES. Oheyne investigated foul-brood, isolated the bacillus, and fully described its morphological and biological characters in nutrient media. By removing the cap of one of the diseased cells, the de- composing larva can be withdrawn, and cover-glass preparations will reveal delicate bacilli and large oval spores. The bacilli can be readily isolated and cultivated in nutrient M gelatine. Fig. -Spoees ob' Bacillus ALVEI. Bacillus alvei (Cheshire and Cheyne). Rods varying in size, and forming large oval spores. They are motile and possess flagella. Cultivated in nutrient gelatine in test-tubes, a delicate ramifying growth appears on the surface, and irregular whitish masses arise along the needle track. Pro- cesses shoot out from these masses, and extend through the gelatine for long distances. They are thickened at points in their course, and are clubbed at the ends. The gelatine is gradually liquefied, and the bacilli form a loose, white, floccu- lent deposit at the bottom of the tube. The liquid in the tube becomes yellowish in colour after a time, and gives off an odour of stale, but not ammoniacal, urine. On the surface of nutrient gelatine the bacilli grow out in chains of rods in single file, or of rows of several side by side. The processes which are formed tend to curve, and at a short distance from the track of the needle form a distinct circle, from which another process grows out, and a fresh circle is developed. The gelatine in the vicinity of the bacilli gradually hquefies, and channels are formed in the gelatine in which the bacilli move backwards and forwards. On nutrient agar-agar a whitish layer develops, consisting of bacilU arranged side by side, which in a few days are replaced by rows of spores similarly arranged. On. Fig 194.—Pure-cultuke in Nut
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