4 The Philippine Journal of Science 1915 
of September 149 cholera “contacts” showed 3 positive, or 2 
per cent, while of 691 specimens taken systematically from the 
inhabitants of city blocks, 13, or almost exactly 2 per cent, were 
positive. The same applies to Station J for September, with 
57 positives out of 2,970 systematic examinations of nonsuspects, 
and 12 positives out of 541 contacts. 
The above statistical table also well shows the invasion of Paco 
district by the infection, due to being conveyed by the floods 
of September. Prior to the floods it had been practically free 
from cases—afterwards, both cases and carriers increased in 
almost parallel ratio. 
The vast amount of assistance given the health work by the 
Bureau of Science is shown by Table II. 
TABLE Il.—Number of examinations for cholera made at the Bureau of 
Science and number found positive for four months in 191}. 

| eau Speci- | 
nations mens 
Tad | for | found 
| cholera. | positive. 



Tidy. LN EN ha Yr TE a eed a eer | assed? ae 
Anis tee Bk Ta A I et a Se eee ee ge 9,994; 652 | 
September= 3-2-0245 -5 2h RE ee Se a oe ee ee eee 24, 402 989 
| October. anne nnn ee et ean ence omens | 32,824] 191 
| 
| Potale rece sts. Sees nea Ae ee oS ee ula es | 70,552 | 1,969 

From November 1 to November 10 approximately 20,000 bac- 
teriological examinations were made. Cases and carriers have 
both now fallen almost to the vanishing point, and the exam- 
ination for cholera of apparently healthy persons will shortly 
be discontinued. However, when so discontinued, well over 
100,000 such examinations will have been made. 
Of the above gross figures, a considerable proportion of the 
positive findings represent subsequent examinations of cases 
previously found positive which were being examined to deter- 
mine the time when they had cleared up as carriers and could 
be discharged from isolation. 
It will be apparent from the above that the work of detect- 
ing cholera carriers presented grave difficulties of administration 
by reason of its magnitude. There were also social and political 
difficulties which had to be overcome before it was possible to 
undertake the purely scientific and administrative work. The 
work meant invasion of the accepted rights of the home and 
of the individual on a scale perhaps unprecedented for any com- 
munity. The collection of the feecal specimens necessary might 
fairly be regarded as repulsive to modesty. Add to this the facts 
that the search was made among persons apparently healthy to 
