THE COMMUNICABLE DISEASES 493 
which these naturally free active beasts are subjected, in 
catching, transporting and storing for sale, must at pres- 
ent remain conjectural, but they are probably infected 
with ease as our experience in this laboratory suggests. 
Desiring a tuberculous monkey for certain tuberculin 
tests, I injected one hundredth of a milligram of a human 
culture, known to produce definite lesions in rabbits ; the 
animal died in three months with advanced general tuber- 
culosis. The unexpected and interesting feature of our 
figures is the susceptibility of different families within 
the order. The Old World monkeys, Simiadae and Cerco- 
pithecidae have a combined incidence two and one-half 
times as great as the New World Cebidae, and the marmo- 
sets had no tuberculosis at all in the thirty-two speci- 
mens. Possibly this is a matter of transportation and 
handling, which reduces the resistance and offers chance 
to infect apes and baboons. The New World capucin mon- 
keys have their exposure too since many of them are 
household pets before the Garden receives them. Their 
usual life in captivity is however shorter than that of 
Old World varieties, they therefore being exposed to in- 
fection for a shorter time. It would seem however that 
American Primates are more resistant to the disease than 
African and Australasian. 
The form of tuberculosis to which this order is liable 
is well described in text-books, it being so characteristic 
that the term '' monkey tuberculosis " is used to dis- 
tinguish it. The purpose of the term is to compare the 
lesions with certain cases of generalized tuberculosis in 
children. It is characterized by a nodular involvement of 
the liver and of the spleen particularly, sometimes also 
of the lungs but in fatal cases the last organ is commonly 
the seat of massive caseation or caseous pneumonia. The 
prominence of the pulmonary lesions often makes a deci- 
sion of origin difficult since important changes may be 
found in the liver and abdominal nodes. Blair at New 
York, and Rabinowitsch at Berlin are of the impression 
that many cases of monkey tuberculosis start by pharyn- 
