Pensri GuptavanijChamlong HarinasutaMahidol University2018-03-222018-03-221977-12-01Southeast Asian Journal of Tropical Medicine and Public Health. Vol.8, No.2 (1977), 185-189003836192-s2.0-0017712907https://repository.li.mahidol.ac.th/handle/20.500.14594/10277The periodicity of Brugia malayi microfilariae were studied in the two endemic areas of South Thailand i.e. in Pattani and Narathiwat provinces. It was found that in Pattani province the microfilariae had a markedly nocturnal periodicity character, while in Narathiwat province they were of a nocturnal sub-periodic type. Moreover, the microfilariae of periodic form in Giemsa stained blood films usually had 'unsheathed' appearance (71.5%), while those of sub-periodic type were mostly of 'sheathed' form (93.4%).Mahidol UniversityMedicineArticleSCOPUS