BACTERIUM MALLEI 157 



much better in the presence of oxygen than in its 

 absence. They do not form spores nor are they motile. 

 They are killed at 55 C. or 130 F. in ten minutes; by 

 1 to 1000 bichloride or 1 to 100 carbolic acid in ten 

 minutes. After drying they may live for ten days, but 

 do not live long in nature outside the animal body. 

 They are easily grown upon most of the laboratory food- 

 stuffs. Most of the lower animals are susceptible to 



FIG. 44 



Glanders bacilli. Agar culture. X 1100 diameters. (Park.) 



glanders and it is of some importance in menageries. 

 The disease in animals is like that described for per- 

 sons, and the beasts do not develop anything in their 

 blood which can be used to treat human beings. Vac- 

 cines are not successful probably because the disease 

 in people is too acute to be amenable to a treat- 

 ment with mallein comparable to that described for 

 tuberculin. 



