Fig. 95. Histoplasma capsulatum. A, subcultures on a 10 per cent blood dextrose agar 

 slant at 37 C. after one month; growth is dull red, elevated and compactly duveteuse. The 

 upper part of the colony, where the agar is thin, becomes fluffy and white. B and C, growths at 

 one month on dextrose agar, the former enriched with 10 per cent whole blood. D, mount from 

 dextrose broth culture at 37 C. showing terminal, lateral and intercalary chlamydospores; X 670. 

 7',', budding growth from yeastlike forms growing on sealed blood agar at 37 ('.; x L530, F, (.' 

 and //, spiny and smooth-walled chlamydospores from colon) on sealed blood agar at 37 C; 

 X 670, x 1530 and x 1530, respectively. {Specimens, courtesy of M. E. Pinkerton, and A. C. 

 Service and A. J. Donnelly.) 



330 



