104 
tainly over thdrty other dairymen sold milk and the routes of some 
of them ramified through the same sections as those of Xos. 59 and 
11; but there was no unusual number of cases among the customers 
of any of these other dairymen. 
The following table gives the age and sex of the cases attributed to 
infection in milk during this outbreak: 
Age in years. 
Number of cases. 
Male. 
Female. 
Total. * 
0 to 4 
4 
1 
5 
5 to 9 
5 
8 
13 1 
i 10 to 14 
5 
3 
8 
' 15 to 19 
2 
i 20 to 24 
3 
3 ' 
' 6 
I 25 to 29 
1 
6 
7 
: 30 to 34 
3 
1 1 
! ^ 
: 35 to 39 
1 
3 
40 to 44 
0 
1 
1 
1 45 to 49 
0 
0 
0 
50 to 54 
0 
0 ' 
0 
55 to 59 
0 
0 
0 
60 to 64 
1 
1 
2 
65 to 69 
0 
1 
1 
Total 
25 
i 
29 
1 
54 
Thus the majority of the cases were among children, about 50 per 
cent of the cases being in persons under 15 years of age. 
The history of the cases in regard to the use of milk previous to 
illness was as follows: 
TT ^ Number 
How used: of cases. 
As a beverage 30 
On fruits or cereals, but not as a beverage 20 
In coffee only - 2 
As ice cream only 2 
Total 54 
The source of water used by the cases for drinking during the 
thirty days previous to illness was as follows : 
Unboiled tap solely 28 
Unboiled tap principally and outside of the District of Columbia 7 
Boiled tap solely 1 
Boiled tap principally and outside of the District of Columbia occasionally 7 
Boiled tap principally, unboiled tap, and outside of the District of Columbia occa- 
sionally 5 
Boiled tap principally, but unboiled tap, bottled, and outside of the District of 
Columbia also 1 
Boiled tap principally, unboiled tap occasionally 2 
Boiled tap principally, bottled water occasionally 1 
Filtered tap principally and boiled tap occasionally 1 
Private well solely 1 
Total 54 
