| microfilaraemia survey in vientiane, laos. | during the period june 1977-january 1978 a microfilariaemia survey was conducted for the first time in 27 villages (population: 9,300) of vientiane province of laos. a total of 2,339 persons, 1,372 males, 967 females, mostly adults, were blood tested between 2000--2400 hours; one thick smear, approximately 20 c.mm, was collected from each one and stained with 10% giemsa for 30 minutes; only one positive was detected with microfilaria of w. bancrofti in a 22-year-old male; unusually the sheath wa ... | 1979 | 395663 |