PARASITOLOGY 
A SUPPLEMENT TO THE JOURNAL OF HYGIENE 
INTRODUCTION 
When the Journal of Hygiene was founded it was announced that 
papers on Parasitology “in relation to hygiene and preventive medicine” 
would be published in its pages. It has however been felt for some 
time that the Journal was becoming unduly burdened with papers 
dealing with the anatomy of mosquitoes, fleas, protozoa and other 
parasites—of great importance in themselves—but having only an 
indirect relation to hygiene and preventive medicine. 
The remarkable development of parasitology in recent years, and 
the increase in our knowledge of the part played by parasites in human 
and animal diseases, demand a means of publication, in the English 
language, of original papers dealing with the subject in its widest sense. 
It is proposed in future to relegate all such papers to Parasitology. 
The fundamental discoveries upon the modes of infection in plague, 
malaria, sleeping sickness, yellow fever, ankylostomiasis, elephantiasis, 
and other important diseases, affecting man and animals, render it 
evident that the cooperation of specialists in different fields is required 
for the proper elucidation of the complex problems which surround the 
causation of these diseases. The successful study of such diseases, as 
are carried through the agency of invertebrate hosts, demands therefore 
not only investigations into the processes which occur in the affected 
vertebrate, but also observations on the structure and life-history of the 
pathogenic organism, and of the alternative host, or hosts, which serve 
to spread the disease. Thus, a knowledge of the structure and biology 
of mosquitoes, biting flies and ticks is necessary for a comprehensive 
knowledge of the etiology of malaria, trypanosomiasis, spirochaetosis 
and piroplasmosis, and a knowledge of fleas and their habits is essential 
in the study of plague. Further, recent discoveries relating to parasitic 
