Abstract
THE annual report of the South African Institute for Medical Research, by the director, Sir Spencer Lister, summarises the work of the Institute during 1931. Methods of dust estimation and studies on underground humidity in the air of the Witwatersrand mines have been pursued. The pneumonia attacking the native labourers in the copper mines of Northern Rhodesia has been investigated, and has been found to be caused by the Streptococcus pyogenes and other organisms, but rarely by the pneumococcus. This change of type of the organisms causing pneumonia has also been found in the Kimberley diamond mines. Much experimental work has been done on cancer, and Dr. des Ligneris has found that a microorganism, Salmonella gallinarum of fowl typhoid, if cultivated in the tumour filtrate of the Rous fowl sarcoma for several generations, appears to have the power on inoculation of prolonging the life of fowls with the Rous sarcoma by about fifteen per cent.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
