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white and the negro in the District of Columbia with the typhoid 
statistics for the two races. 
At the Government hospital the negroes presented a whipworm 
infection of 9.79 per cent, and 746 whites of similar history showed 
an infection of 3.75 per cent. If, now, the whipworm infection at 
St. Elizabeth even approximately represents the relative whip- 
worm infection for the two races in the District of Columbia, and if, 
further, whipworms play any role in typhoid, one might expect to find 
typhoid to be distributed in the whites and negroes here in approxi- 
mately the same proportion as are whipworms. 
For the year 1903 the District Medical Sanitary Inspector (Walsh, 
1904, 54) reports a higher percentage of typhoid among the whites 
than among the negroes, namely, 3.78 per 1,000 white inhabitants and 
3.08 per 1,000 negroes. Thus the district typhoid statistics for 1903 
are not in harmony with the whipworm statistics for St. Elizabeth for 
approximately the same period. On basis of the typhoid reports it 
must therefore be concluded that either the whipworm statistics of St. 
Elizabeth Hospital, in reference to race, are directly opposite to the 
general statistics in the population at large for this locality (a con- 
clusion not in harmony with other examinations which have been made 
here) or that the theory of the existence of a relation between whip- 
worms and the infection with typhoid receives no support from our 
statistics of the relative frequency of whipworms among the whites 
and negroes. 
The lethality of typhoid in the District of Columbia is, however, 
greater among the negroes (19.35 per cent) than among the whites 
(10.69 percent). This fact gives rise to the question whether the 
statistics on the relative frequency of this disease in the white and 
in the negro are not misleading. Is this higher death rate among 
negroes due to later diagnosis and inferior nursing, or to the failure 
to recognize and report the lighter cases — cases which might be 
more promptly recognized among the whites? On the other hand, 
is the higher rate of occurrence and the lower lethality of typhoid 
reported for the whites influenced by the inclusion of any cases of 
other diseases, such as malaria, in the typhoid statistics? These are 
questions to which we do not feel justified in giving a definite answer 
at present. 
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