Brugia malayi in seven villages in South Kalimantan, Indonesia

Seven villages in South Kalimantan were visited in 1971 and night peripheral blood smears from 2,764 people examined for microfilariae. Brugia malayi was found endemic in all villages with microfilarial rates of 12--46% (average 25%) and the median microfilarial density (MfD50) of 6 to 15 microfilariae per 20 microliter of blood. The microfilariae showed a typical subperiodic pattern. The disease was more common in males than females and the prevalence increased with age. Clinical manifestations of filariasis were found in 20% of 1,099 persons examined. Mansonia species are considered important vectors and cats important reservoir hosts. In addition to B. malayi, Dirofilaria repens and an unknown microfilaria were found in cats in the area and strains of the B. malayi and D. repens have been established in the laboratory.