. The bacteriology of the eye. Fig. 27.—Diplobacille Agar Colony (Petit). 170 BACTERIOLOGY OF THE EYE pagated from bouillon on to ordinary agar. The Petit type certainlylost its power of liquefying gelatine, but it could always be grown onsimple media, and in any generation could be grown in bouillon, andfrom there again back on agar, which transference never was possiblewith the Morax-Axenfeld bacillus. (In these experiments the Petit Diplobacillus was cultivated for twoyears on blood-serum.) The Morax-Axenfeld Diplobacillus, too, can sometimes produce thesame form of hypopyon-ker
. The bacteriology of the eye. Fig. 27.—Diplobacille Agar Colony (Petit). 170 BACTERIOLOGY OF THE EYE pagated from bouillon on to ordinary agar. The Petit type certainlylost its power of liquefying gelatine, but it could always be grown onsimple media, and in any generation could be grown in bouillon, andfrom there again back on agar, which transference never was possiblewith the Morax-Axenfeld bacillus. (In these experiments the Petit Diplobacillus was cultivated for twoyears on blood-serum.) The Morax-Axenfeld Diplobacillus, too, can sometimes produce thesame form of hypopyon-keratitis. This Petit had not had the oppor-tunity of observing when he recorded his type. In my own material. Fig. 28.—Diplobacille Mammelonnees (Petit). Also occurs in Petits type. Fig. 29.—Gelatine Stab Cul-ture of Petits Bacillus. Funnel-shaped excavation at ° C. consisting of twenty-three cases of diplobacillary keratitis, according tothe analysis of Dr. Agricola, one-third were caused by the Morax-Axenfeld type, and an even higher proportion is recorded by Paul andbyErdmann. These two writers consider that the two types probablyare identical. I am of the opinion that they are very closely related,but that they must be looked upon as variations of the same familyso long as a complete transference of the one type into the otherbe accomplished. It may, perhaps, be possible. This point of viewcannot is taken by Zur Nedden, who only found the Petit type inhypopyon-keratitis. It is very peculiar that the Petit variety is rarein conjunctivitis, but is fairly frequently found in the cornea in SPECIAL FORMS OF CONJUNCTIVAL INFECTION 171 hypopyon-keratitis, while th
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