REPORT ON THE DISEASES OP SILKWORMS IN INDIA 



155 



Dextrose 

 Lactose 



Habitat 



Gas. 



Gas. 



Gas also given in maltose, saccharose and mannite. 



Gut of diseased caterpillar (univoltine, Kashmir), 



Probably Bacillus coli. 



Micrococcus a. 



Morphology . . Usually diplococcus — diam. about - 75n. 



Gram . . . Positive. 



Agar plate . . Round, greasy, opalescent, turning dirty white and finally 



yellowish. 

 Agar slope . . Filiform, greasy, opalescent turning dirty yellowish white. 



Gelatine stab . No liquification, filiform, yellowish white on surface. 



Potato . . . Raised, greasy, pale Naples yellow. 



Nutrient broth . Cloudy giving ppt. 

 Litmus milk . . Coagulated — acid after several days. 

 Dextrose . . No gas. 



Lactose . . No gas. ^ 



Habitat . . Diseased muga and mulberry worms ; dead mulberry moths pupae ; 



healthy muga, eri and mulberry worms ; leaf of mulberry and 



castor ; air. 

 ? Streptococcus pastorianus, Krassilschtschik. 



Micrococcus b. 



Morphology . . Diplococcus — about 1 |x diameter. 



Gram . . . Positive. 



Agar "plate . . Round, opalescent becoming deep cadmium yellow, almost brown, 



greasy, finely granular. 

 Agar slope . . . Filiform, greasy, deep cadmium yellow. 



Gelatine stab . Liquifying in form of nail with yellow ppt. 



Potato . . . Rather flat, greasy to dry, yellow. 



Nutrient broth . Turbid, yellow ppt. 

 Litmus milk . . Coagulated — acid. 



Dextrose . . No gas. 

 Lactose . . No gas. 



Habitat . . Diseased mulberry worms ; dead mulberry moths ; mulberry leaf ; 



air. 

 Probably Streptococcus a of Sasaki. 

 ? Streptococcus bombycis, Macchiati. 



Micrococcus c. 



Morphology . . Diplococcus — diam. about 0'75n. 



Gram . . . Positive. 



Agar plate . . Round, opalescent turning pale Naples yellow. 



Agar slope . . Filiform to echinate, greasy, whitish turning pale yellow. 



Gelatine stab . No liquifaction— yellow on surface. 



Potato . . . Scanty, colourless, greasy. 



Nutrient broth . Turbid. 



Litmus milk . . No change. 



Dextrose . . No gas. 



Lactose . . No gas. 



Habitat . • Mulberry leaf, and air. 



