CHOLERA AND CHOLERA-LIKE VIBRIOS. 

 Table III. — Hcemolytic tests — Continued. 



431 



Name of culture. 



Ruffer's method, suspension 

 of live vibrios. 



Kraus's method 0.1 cc. 3-da3 r 



• bouillon, killed to 1 cc. 5 per 



cent suspension red cells. 





12 hours. 



24 hours. 



48 hours. 



12 hours. 24 hours. | 48 hours. 



No. 3 _ _ 



- 



- 







No. 4 



- 









No. 5 



\\l 









No. 6. _„ 









902 





























— 





-- 









046 









074 _ 



— 









099 





















- 



- 









Salvador _' 



Tarlae 1 



Lloret __ 



























DOES THE HOG ACT AS A "CHOLERA CARRIER" IN THE PHILIPPINES? 



Because of the extent to which the hog acts as a scavenger in this 

 Archipelago, it seemed advisable to determine whether or not that 

 animal could act as a cholera carrier under natural conditions. Accord- 

 ingly, two partly grown pigs were selected for feeding, while a third 

 was chosen as a control. 



After carefully ascertaining that there were no cholera-like vibrios 

 in the stools of any of the animals, two were fed three twenty-four 

 hour agar slants of a recently isolated cholera vibrio, mixed with 

 feces from a normal man and made faintly alkaline with sodium 

 carbonate. The stools of these two pigs were examined daily for a 

 week, but we were never able to isolate a vibrio from them. The ex- 

 periment was repeated on the same animals with the same result. 

 Finally, each one of the pigs was fed a litre of fresh rice water stool 

 from cases of cholera in San Lazaro Hospital. Neither showed any 

 bad effects from the feeding and again we were unable to isolate a 

 vibrio from the feces from either pig in an examination made each day 

 for ten days. As we were endeavoring to simulate natural conditions, 

 we did not try the effect of neutralizing the contents of the pigs' stomachs, 

 nor similar procedures. 



