Wars conducted on foreign soils, particularly in tropical climates, are invariably provocative of new diseases or of an increase in prevalence of those which normally occur only sporadically. Chancroid is one of the diseases belonging to the latter group; its prevention and treatment present many military, public health and economic problems. Although it is seldom observed in large urban centers of the temperate zone or in small country towns, it is particularly prevalent in the southern states, in North Africa and in the Southwest Pacific. Greenblatt appropriately described it epidemiologically as "a disease of the unclean, of the people who do not use soap and water with any degree of frequency, particularly when coitus is performed on the run."
In the armed forces stationed in the United States chancroid comprises about 6 per cent of all genitoinfectious diseases. However, in the Navy and Marine Corps, a large percentage
COMBES FC, CANIZARES O. EXPERIMENTAL PROPHYLAXIS OF CHANCROID. Arch Derm Syphilol. 1945;51(4):237–240. doi:10.1001/archderm.1945.01510220011002