Tins greater frequency of intestinal worms among negroes than 
among whites held for both males and females in the above groups, 
as follows : 
Examined. 
Infections. 
Per 100 
persons. 
Male patients: 
Whites 
397 
22 
5.54 
Xegroes 
179 
2S 
15.64 
Female patients: 
Whites 
349 
15 
4.30 
Xegroes 
199 
19 
9.55 
The relative frequency of each species of intestinal worm in whites 
and in negroes was as follows : 
Examined. 
Infections. 
Per 100 
persons. 
Trichuris tricJiiura: 
White patients 
746 ' 
28 
3.75 
Xesrro patients 
378 1 
37 
9.79 
Oxyuris rermicularis: 
White patients 
746 
4 
0.54 
Xegro patients 
378 
1 
0.26 
Hookworms: 
White patients 
746 
2 
0.27 
Xegro patients 
378 
3 
0.79 
Ascaris lumbricoides: 
White patients 
746 
0 
0.00 
Xegro patients 
378 i 
3 
0.79 
Strongyloides stercoralis: 
White patients 
746 
3 
0.40 
Xegro patients 
378 
0 
0.00 
Hymenohpis nana: 
White patients 
746 
0 
0.00 
Xegro patients 
378 
3 
0.79 
Taenia saginata: 
White patients 
746 
0 
0.00 
Xegro patients 
378 
0 
0.00 
Thus a higher rate of infection among negroes than among whites 
was foimd in the case of whipworms, of hookworms, of eelwonns, and 
of dwarf tapeworms, the last two parasites having presented no infec- 
tions among the white patients used in comparison. Pinworms and 
Cochin China worms gave higher percentages of infection among 
whites. Cochin China worms did not appear among the negroes in the 
above group. 
The above results would seem to indicate that helminthiasis in gen- 
eral is more common among negroes than among whites: that whip- 
worm infections are much more common among negroes : that negroes 
