Now showing items 1-10 of 17
New data on the vision of South American Indians
A total of 466 males and 437 females from four Brazilian Indian tribes were tested for color blindness with Ishihara's plates. Defective persons were found in three of the four tribes, but when these and other groups are ...
Study of the area affected by onchocerciasis in Brazil: survey of local residents
An epidemiologic survey encompassing most of Brazil's Federal Territory of Roraima and the northern tip of Amazonas State has been carried out in an effort to define the boundaries and the epidemiologic characteristics of ...