BACILLUS-COLI-LlKE BACTERIA FROM FECES AND SEWAGE 



kauer-negative strains are observed with many other test substances, 

 as maltose, sucrose, glycerol, and dulcitol. 



B. GALACTOSE 



The frequency distributions with respect to acid-production in 

 galactose are shown in Table 2. Less acid is formed from galactose 

 than from glucose, and the frequency distributions are very nearly 

 normal. Multiple modes are not present. The average amount of 



TABLE 2 



RELATION OF SOURCE, MACCONKEY TYPE, AND VOGES-PROSKAUER REACTION TO ACID-PRODUCTION 



IN GALACTOSE 



acid formed by all strains is 1.35% normal, with a distinct mode at 

 1.30%. (Acid was not determined from 2 cultures, 1 from pig and 

 1 from sheep, which broke just before titration.) 



The MacConkey types, I, II, and III, each have a mode at 1.30% 

 normal acid, and means at 1.37, 1.36, and 1.37% normal acid respec- 

 tively. Altho the mode for Type IV is 1.50% normal acid some- 

 what higher than for the other types the mean, 1.27%, is lower, a 

 circumstance indicating a greater variability in Type IV. This greater 



