. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . Fig. 118.—B. diphtherise. Forty-eighthours agar culture. Thick, Indian-clubbed rods and moderate number ofsegments. One year on artificial culturemedia. X 1410 Fig. 120.—B. diphtherise. Twenty-fourhours agar culture. Coccus forms. Seg-mented granular forms on Lofflers variety found; in cases of diphtheriaat Childrens Home. X 1410 diameters. GROWTH OP CVLTVRE MEDIA 295 and the staining, when it does occur, is frequently not at all character-istic. The same round or oval bodies
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . Fig. 118.—B. diphtherise. Forty-eighthours agar culture. Thick, Indian-clubbed rods and moderate number ofsegments. One year on artificial culturemedia. X 1410 Fig. 120.—B. diphtherise. Twenty-fourhours agar culture. Coccus forms. Seg-mented granular forms on Lofflers variety found; in cases of diphtheriaat Childrens Home. X 1410 diameters. GROWTH OP CVLTVRE MEDIA 295 and the staining, when it does occur, is frequently not at all character-istic. The same round or oval bodies which take the methylene bluemore intensely than the remainder of the bacillus are brought out stillmore distinctly by the Neisser stain (p. 78). The Neisser stain has been advocated in order to separate the virulentfrom the non-virulent bacilli, without the delay of inoculating animals;but in our hands, with a very large experience, neither the Neisserstain nor other stains, such as the modifications of the Roux stain,have given much more information as to the virulence of the bacillithan the usual methylene-blue solution of Lofiler. A few strainsof virulent bacilli fail to show a marked characteristic stain, and quitea few pseudodiphtheria bacilli show th
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