27 
and negro males at the Government hospital Trichuris is the predomi- 
nating species in the statistics and the number of infections with 
Oxyuris is so small as to have little influence upon the total figures for 
all infections, among the males (white) at the Connecticut Hospital 22 
of the total 45 infections which were present were with pin worms. 
Eliminating the pin worm infections, the results for the Connecticut 
males in the different age groups were as follows : 
Years. 
Examined. 
Infections. 
Per 100 
persons. 
15 to 30 
93 
6 
6.45 
31 to 50 
245 
12 
4.90 
Over 50 
152 
4 
2.63 
Among the total female patients (Washington and Connecticut) the 
rates of infection with all parasites in the different age groups were 
as follows : 
Years. 
Examined. 
Infections. 
Per 100 
persons. 
Under 15 
51 
10 
19.61 
15 to 30 
170 
13 
7.65 
31 to 50 
476 
63 
13.23 
Over 50 
413 
48 
11.62 
It is seen that among the females, as among the males, the youngest 
age group presented a considerably higher rate of infection than was 
found in any other group. As has been anticipated (p. 26), the pro- 
gressive decrease in the rate of infection with advancing age is not 
present among the female patients as we have found it to be among 
male patients. 
The frequency of infection at different ages in various classes of 
females was as follows : 
Years. 
Examined. 
Infections. 
Per 100 
persons. 
Total infections among white females at the Government Hospital: 
15 to 30 
64 
4 
6.25 
4.86 
4.05 
11.29 
5.88 
13 46 
31 to 50 
144 
7 
Over 50 
148 
6 
Total infections among negro females at the Government Hospital: 
15 to 30 
62 
7 
31 to 50 
85 
5 
Over 50 
52 
7 
Total infections among female patients (white) at the Connecticut 
Hospital: 
15 to 30 
44 
2 
4.55 
20.65 
31 to 50 
247 
51 
Over 50 
213 
35 
16.43 
