17 
Table No. 4 . — Cases of diseases other than typhoid fever from which specimens of feces were 
obtained. 
Diseases. 
Number 
of cases. 
Result of examina- 
tion for R. typhosus. 
+ 
- 
Suminer complaints 
37 
0 
37 
Dyspepsia 
7 
0 
7 
Malaria. 
4 
0 
4 
Tonsilitis 
3 
0 
3 
Liver trouble 
3 
1 
2 
Chronic intestinal catarrh 
2 
0 
2 
Appendicitis 
1 
0 
1 
Pneumonia . 
1 
0 
1 
Gjmecologic 
1 
0 
1 
Tubercular peritonitis ' 
Undetermined, but severe 
1 
1 
0 
0 
1 
1 
Total... > 
1 
61 : 
1 
60 
The first house-to-house canvass was begun on July 15, that being 
about the time when typhoid fever in Washington is at the beginning 
of the six weeks of highest prevalence, and completed on Septem- 
ber 30. 
On this first canvass the specimens for laboratory examination 
and the general data as to population, condition of the houses, 
cases of illness, water and milk used, etc., were obtained. 
A second canvass of the same 32 blocks was begun on October 1 
and completed on October 24. On this second canvass data were 
obtained as to cases of illness which had developed since the time 
of the first visit. So the cases of illness recorded in the table include 
all that could be learned of in these 32 blocks during the period 
extending from July 15 to about October 24. 
To collect the data, every household in the blocks was visited and 
some member or members of the household interviewed. Where 
there were cases of illness attended by physicians the ph 3 ^sicians 
were communicated with in regard to the nature of the illness. 
Throughout this stud}^ all phj^sicians practicing, and all persons 
residing, in the sections were requested bj" circular letter to inform 
Doctor Koberts when any cases suspected to be typhoid fever 
developed. 
Map No. 1 shows the location of the blocks selected for this inten- 
sive stud}^. These blocks represent fairlj" the average sanitary 
and social conditions of the city of Washington. 
Upon our request. Dr. L. O. Howard, Chief of the Bureau of 
Entomology, U. S. Department of Agriculture, and consulting 
entomologist to the United States Public Health and Marine-Hospital 
179— Bull. 52—09 2 
