Leishmaniasis was first described from India as the visceral form kala azar; since then this disease has been found to occur in China, Central Asia, Arabia, North Africa, the Sudan. Kenya and sporadically across Africa ...

In early days in tropical Africa, typhoid fever was said by the pioneer doctors to be rare. With the growth of cities, often in advance of waterborne sanitation, typhoid fever is now one of the commonest fevers ...