432 M'LAUGHLIN AND WHITMORE. 



SUMMAKY. 



We have not been able to add anything to what is already known to 

 questions numbered ('1) and (2). Every vibrio in our list which agglu- 

 tinates in a 1 to 200 dilution of specific anticholera serum is a cholera 

 vibrio, while none of the noncholera vibrios agglutinated in a weaker 

 dilution than 1 to 10. On the other hand, four of our cholera vibrios 

 did not agglutinate equally with all of our cholera sera ; with some they 

 did not agglutinate in a weaker dilution than 1 to 200. It is noted 

 that three of these vibrios had been in mixed cultures on agar for 

 about seven days, in transit from the provinces, but whether this had 

 anything to do with their lowered agglutinability we are not prepared 

 to state. 



None of our agglutinating strains were haemolytic, so that we have 

 not found any vibrios of the El Tor type in these Islands. 



We have not been able to make "cholera-like" vibrios acquire agglu- 

 tinability with cholera sera. 



Dieudonne's medium is satisfactory for the isolation of cholera vibrios 

 from the stools, but it does not assist in separating cholera vibrios from 

 "cholera-like" vibrios. 



We have not been able to show that the hog acts as a "cholera carrier" 

 under as nearly natural conditions as possible. 



EEFEKENCES. 



(1) Barrexscheen. Centralbl. f. Bakt. etc., I Abt. Orig. (1909), 50, 261. 



(2) Dieudonne. Ibid, 107. 



(3) Grubeb and Durham. Munchener med. Wchnsch. (1896), 43, 285. 



(4) Kolle and Gotschlich. Ztschr. f. Byg. (1903), 44, 1. 



(5) Kolle and Meinicke. Klin. Jahrb. (1906), 15, 151. 



(6) Kraus. Wien. klin. Wchnschr. (1909), 22, 43. 



(7) Muiilens and Von Raven. Ztschr. f.Hyg. (1906), 55, 113. 



(8) Neufeld and ELendel. Arb. a. d. kais. Gsndhtsmte (1907), 26, 536. 



(9) Pfeiffer and Kolle. Centralbl. f. Bakt. etc., I Abt. Orig. (1896), 20, 129. 



(10) Rdffer. Brit. Med. Journ. (1907), 1, 735. 



(11) Schumacher. Ztschr. f. Hyg. (1906), 54, 65. 



(12) Zlatogoroff. Centralbl. f. Bakt. etc., I Abt. Orig. ( 1908) , 48, 684. 



