The association of clinical filariasis and Wuchereria bancrofti infections in Jakarta.

In a study carried out in Jakarta, Indonesia between 1969--1977, patients with clinical manifestations of filariasis were examined for microfilaremia. Finger blood (3 X 20 microliter) were examined by conventional methods, venous blood by membrane filtration, urine and hydrocele fluid by concentration methods. A total of 1,422 patients were examined and 182 (12.8%) were positive by blood smear; however, examination by membrane filtration and concentration of urine and hydrocele fluid did not appreciably increase the association between clinical manifestations and Wuchereria bancrofti infection. Approximately 16% of the patients without patent infection were indirectly associated with filariasis, since they co-habitated with persons with microfilaremia. Results of these studies showed that more than 60% of the patients were without patent infection. Factors that may be responsible for these findings are briefly discussed.