CityU VDL now offers a modified Knott’s test for blood-borne microfilaria detection and identification. This is a concentration method to improve the sensitivity of detection on blood film examination. Submit 1 ml of whole blood in an EDTA tube. The turnaround time is 24 hours. In addition, for a complete assessment of microfilaria infection status and response to therapy, CityU VDL offers antibody and antigen ELISA testing for D immitis and D repens.