7 
The thorough and repeated treatment with purgatives which the 
patients at the Government Hospital receive may explain the com- 
paratively, small number of worms which seem to be present in the 
infected cases, for in all probability many of the worms are eliminated 
by repeated purgation. 
CoMPAEisox WITH FOEEiGX STATISTICS. — We have at present no 
American statistics of parasitic infection in adults with which to com- 
pare these general results. Following (Table 1) are the tabulated 
results of similar investigations in Europe and Asia, together with 
those obtained from the work at the Government Hospital. 
Table 1. — Statistics of intestinal itvrms, in United States, Europe, and India. 
Authority and locality. 
Xumber 
; of subjects 
, examined. 
Hookworms. 
Trick iir is. 
Oxyuris. 
Xum- 
ber. 
Per cent. 
Xum- 
ber. 
Per cent. 
Xum- 
ber. 
Per cent. 
United States Government 
Hospital. 1902 
Heisig, Germany, 1893 
! 
500 
230 
73 
1.249 
'600 
2, 629 
752 
972 
611 
1, 755 
1,939 
15 
3 
54 
104 
28 
55 
30 
521 
178 
313 
187 
159 
50 
10.8 
45.2 
38.3.5 
4.41 
5 
19.8 
23. 67 
32. 20 
30.6 
9.05 
2. 57 
23.7 
8.3 
4 
0.8 
Cima, Italy, 1893, 1896 
Dobson, India, 1893 o 
Kesler, St. Petersburg, 1888.. 
Sievers, Germany, 1887 
Both, Germany, 1877-1880 ft. . 
Gribbohm, Germany, 1872- 
1877 & 
944 
i ; ; 
75. 58 
3 
192 
43 
326 
4.1 
15. 37 
7.16 
12. 4 
226 
142 
213 
43 
23. 24 
23.2 
12.13 
2.21 
20 
30.6 
Heller, Kiel, 1872-1875 
Muller, Germany, 1862-1873 b. 
Muller, Germany, 1852-1862 
Zaeslein. German vc 
Banik, Germany c 
Strcnigyloides. 
Ascaris lu/iribri- 
coides. 
Tsenia. 
Total. 
Xum- 
ber. 
Per cent. 
Xum- 
ber. 
Per cent. 
Xum- 
ber. 
Per cent. 
i 
Xum- 
ber. 
Per cent. 
United States Government 
Hospital, 1902 
3 
0.6 : 
2 
0.4 
78 
15.6 
Heisig, Germany, 1893 
Cima, Italy. 1893, 1896 
34 
22 
14.7 
30. 13 
2 
5 
0.87 
6.84 
140 
58 
60. 77 
79.42 
Dobson, India, 1893 a 
131 
10. 49 
18 
1.44 
1, 340 
107. 29 
Kesler, St. Petersburg, 1888 . 
Sievers, Germany, 1887 
35 
5.83 
14. 51 
436 
16. 56 
8 
. 30 
1, 291 
264 
49.06 
Roth, Germany, 1877-1880&. 
86 
11.43 
35.1 
Gribbohm, Germany, 1872- 
1877 b 
178 
18. 30 
717 
73. 76 
Heller, Kiel, 1872-1875 
j 108 
17.73 
437 
71. 17 
Muller, Germany,1862-1873 b 
Muller. Germany, 1852-1862 b 
Zaeslein, Gcrmanv c 
227 
12. 93 
599 
84.11 
' 180 
9. 28 
273 
14. 07 
11.4 
Banik, Germany c 
7. 3 
a Dobson found also 13 cases of distomatosis (1.04 per cent). 
bHeisig, 1893. Beitrag zur Statistik menschlieher Entozoen. Greifswald. 
fSievers, 1887, Schmarotzer-Statistik aus den Sections-Befunden des pathologiscben Instituts zu 
Kiel. 
rf It will be noted that the figures in the total column represent the number of infections found 
per 100 cases, not the number of cases infected. 
In every case but one the foreign results show a higher percentage 
of infection with all parasites than was found in our examinations. 
In no case was mention made of St rang yl aides ^ and the only statistics 
for hookworms are those of Dobson in India, who found there 75.58 
per cent of infection with Aachi/lostoma duodenale in examining over 
1,200 natives. 
