100 NATIONAL TRENDS IN BIOLOGY 



gas, the discoverer of the parasite which is the cause of 

 Chagas Disease, named after its discoverer. This tropical 

 disease, characterized by enlarged glands, anaemia, and 

 heretofore by death, is no longer invariably fatal. 



Dr. Chagas is a man of tremendous energy, and after 

 what Northerners have usually thought of the enervating 

 influence of the tropics, one has but to meet their great 

 men, to find that, as usual, most popular ideas are 100 

 per cent wrong. 



Another man, part and parcel of the Institute, is Dr. 

 Adolph Lutz, one of the very few South Americans ever 

 asked to lecture in North America. He was brought to the 

 United States by the American Philosophical Society to 

 speak at their Bicentenary Celebration in 1927. The work 

 of Dr. Lutz covers a period of a full half century, during 

 which time he has made thousands of investigations on 

 tropical parasitic forms of life. 



Although the Institute is very large and employs several 

 hundred men, it can furnish only enough sera for the army 

 and navy. Private institutions of an industrial nature fur- 

 nish the balance as needed by the medical profession in its 

 private practice. Dr. Vital Brazil has founded one of these 

 industrial institutes in Nictheroy, a suburb of Rio de 

 Janeiro. 



In the typhoid endemic regions, typhoid injections are 

 given only to those who wish them. As these injections are 

 not compulsory, and as there should be three injections 

 with an intervening interval of several days, many who 



