“…The disease is endemic in India and Sri Lanka, and large series have now been reported by Karunaratne (1964), Kameswaren (1966), Satyanarayana (1960) and Darbari et al (1972). Smaller series have been reported by Firouz-Abadi et al (1971) in Iran, by Owor and Wamukota (1978) in Uganda, by Ramanathan et al (1968) in Malaya, and by Lasser and Smith (1976) in the USA, with sporadic cases from Argentina, Brazil, Paraguay, South Africa, the UK and Poland. Nearly all the sporadic cases have occurred in immigrants from areas where it is endemic.…”