﻿IX, B, 3 



Willets: Widal Reactions Among Filipinos 



257 



1913, indicate that the disease is on the increase. In the fiscal 

 year 1911, 22, or 1.46 per cent, of 1,509 ; in 1912, 68, or 1.96 per 

 cent, of 3,469; and in 1913, 108, or 3.62 per cent, of 2,985 medical 

 cases were diagnosed as typhoid fever. The annual reports of 

 the Bureau of Health for 1911 and 1913 likewise tend to prove 

 the increased incidence of typhoid or, at least, its increased 

 recognition. In a general way, the increased percentage (4 

 against 2.9) of positive Widal reactions in our series of healthy 

 individuals as compared with that obtained by Chamberlain in 

 1910 may be said also to indicate its increased prevalence. 



Table III gives the results of Widal reactions performed upon 

 25 employees of the hospital before and two weeks after anti- 

 typhoid treatment. If the presence of a positive Widal reaction 

 after treatment is an index of protection against typhoid fever, 

 it appears that the treatment was effective in 21, or 84.0 per 

 cent, of these cases. In this connection it is to be noted that 3 

 of the 21 cases were positive before treatment. 



Table III. — Widal reactions in 25 employees before, and two weeks after, 

 antityphoid treatment. (Serum diluted 1 to iO.) 



No. 



Before treatment. 



After treatment. 



No. 



Before treatment. 



After treatment. 



Minutes. 



Result. 



Minutes. 



Result. 



Minutes. 



Result. 



Minutes. 



Result. 



1 



2.... 



3 



4..— 



5 



6 



7 



8 



9 



10 



11»... 



12 



13 



60 

 40 

 30 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 



+ 



+ 



60 

 60 

 30 

 60 

 30 

 30 

 60 

 60 

 30 

 35 

 40 

 60 

 60 



+ 

 + 



+ 

 4- 

 + 

 + 



+ 

 + 

 + 



14 



15 



16 



17 



18 



19 



20 



21 



22 



23 



24. 



25 



60 

 55 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 

 60 



+ 



30 

 30 

 30 

 60 

 30 

 45 

 45 

 45 

 40 

 50 

 60 

 45 



+ 

 + 

 + 



-r 

 + 

 + 



+ 



+ 



' Two injections only. 



■> One injection only. 



