590 EPIDEMIOLOGY 
APPENDIX I. FORMS FOR TYPHOID INVESTIGATIONS 
Suggested Form for Physicians’ Report on Typhoid Fever 
TyvpHor Iever 
ASC nen e dene ene bn eee e te btn eee nnes 
Place of Business... .. bce e eens Lecce ene eeee 
Occupation... 6... cc eee eee cee tee tee eee tenets eneenes 
PHYSICIAN. 6 eee en cee been cee bbe ene eee ntn ete euee 
Date of First Symptons... 2.0... cece eee ve te eters een eeee 
Date of Physician’s First Visit... 0.0.0.0. 0.0 cc ec ec ee ce cece cee cus eeceeee 
Was Widal Test Made?............. Positive or Negative..............0... 
Was Patient Out of Town within Thirty Days?.......000000 0.00.0. cece eee 
Between what Dates... 0.0... ce cee ccc cee eee cc need cee e ase eeeuee 
If So, How Many. ..... 0... ccc ee ee cee en ene canna venues 
State Source of Drinking Water... 0.0.0.0... 0.0 0c cc cee cee cee eee aueen 
Give Name of Milk Dealer 
Remarks 
2 re 
i SO 
i 
i cc 
The preparation of a spot map is very often an aid in studying epi- 
demics. If the cases are about evenly distributed over a city it is a 
fair indication that the water supply is to blame. If the cases are 
grouped in several localities, it may indicate that a milk supply or a 
carrier is to blame. Fig. 84 shows such a map which was prepared 
by Bartow (1912) for a water-borne epidemic. 
BIBLIOGRAPHY 
Bartow, E. Discussion to Paper by Hill (1912). 
Boupreav, F.G. 1914. The Mode of Procedure in the Study of Epidemics. 
Ohio State Board of Health Bull. 4, 1277-1286. 
Frercuson, H. F. 1916. Epidemic of Typhoid Fever Caused by Polluted 
Water Supply at Old Salem Chautauqua. Illinois State Water Survey 
Bulletin No. 13, 272-286. 
Hansen, P. 1914. A Study of Typhoid Fever in Rockford, Illinois, in the 
Late Summer and Fall of 1918. Illinois State Water Survey Bull. No. 11, 
384-430. 
