CARRIAGE OF DISEASE 
133 
years after recovery, the excretion continued. Levy 
and Kayser report that in the autumn ol 1905 a num¬ 
ber of cases of typhoid fever occurred in an insane 
asylum, in which two years previously an inmate had 
had the disease and had recovered. On the appear¬ 
ance of these later cases, this person was examined and 
was found to be excreting the bacilli in her feces. Fur¬ 
ther examinations were made at intervals of several 
weeks, and the bacilli were found ten times. In Oc¬ 
tober, 1906, she died of a typhoid bacillary septicemia, 
due to auto-infection from the gall bladder; and on 
autopsy the bacilli were isolated from the spleen, liver, 
bile, wall of the gall bladder and from the interior of 
a large gall-stone. 
“A somewhat similar case is reported by Nieter and 
Liefmann, also from an insane asylum in which the 
disease had been endemic for many months. A patient 
dead of chronic dysentery was examined and typhoid 
bacilli were found in the intestines and in pure culture 
in the gall bladder, in which were gall-stones. Among 
250 inmates were found seven typhoid carriers. 
“Klinger found, among 1,700 persons, twenty-three 
typhoid carriers, ranging in age from eighteen months 
to sixty years, eleven of whom had no typhoid history. 
Of 842 convalescents from the disease, sixty-three, or 
thirteen and one-tenth per cent, were found to be excret¬ 
ing the bacilli, and eight were still doing so six weeks 
after recovery. 
“Kayser, tracing outbreaks to their sources, found 
a boy of twelve years, a member of a milkman’s fam- 
