PREFATORY NOTE 



TT is a difficult matter for medical and veterinary officers stationed in the Sudan, 

 -*- especially those who happen to be in out-stations or who have to travel frequently, 

 to keep in touch with current literature. This Review is intended to help them in some 

 measure, to serve as a guide to new books and papers, and to present in a small compass 

 the most important recent discoveries on the subjects indicated. It is also intended to 

 indicate in what directions our Imowledge as regards tropical and veterinary medicine, 

 bacteriology and hygiene is deficient in the Sudan, and it is hoped that it will thus 

 stimulate research and lead to the acquisition of useful information. References are given 

 so that those who wish to go more fully into any special subject may be able to obtain 

 the original book or paper. Every care has been taken to render these as correctly as 

 possible. No attempt has been made to produce a text-book, and for the most part the 

 references have been confined to sound practical papers likely to be helpful, but the 

 scientific aspect of certain questions has been considered for the reasons stated above. 



While in the main intended for medical and veterinary officers in the Sudan, many 

 of whom have rendered the laboratories valuable assistance, it is hoped that workers in 

 other tropical countries, where the conditions are similar to those obtaining in the 

 Sudan, may find this Review of service. It is possible that it may also appeal to 

 the students of Tropical Medicine in temperate climates, especially such as may 

 be preparing for special examinations. 



At the same time, it is to be regarded as supplementary to the Third Report of 

 the Wellcome Research Laboratories, and hence the range of subjects dealt with 

 is, of necessity, limited. 



