170 APPLIED BACTERIOLOGY FOR NURSES 



really infections due to pneumococci, streptococci, or other 

 bacteria. On the other hand, influenza bacilli are some- 

 times found in large numbers in cases in which influenza is 

 not diagnosed. The extensive country-wide outbreak in 

 the United States (December, 1915, and January and Feb- 

 ruary, 1916) appears to have been due largely to strepto- 



Fig. 53. Bacillus of influenza; X 1000 (Krai). 



coccus infection, although the influenza bacillus played a 

 not unimportant role. 



Now and then the influenza bacillus produces a typical 

 meningitis. This is very fatal. A bacillus similar to the 

 influenza bacillus appears to be associated with whooping- 

 cough. Prophylaxis in influenza is similar to that dis- 

 cussed under Pneumococcus. 



Micrococcus of Malta Fever. A very small, rounded 

 or slightly oval micro-organism, Gram-negative, and 

 growing rather feebly on artificial media. The organ- 

 ism appears to be present in the feces of goats in Malta, 

 and probably contaminates the milk. In man a typhoid- 



