Utami, P.D., Department of Parasitology, Faculty of Medicine, Hang Tuah University, Surabaya, Indonesia; Hadi, U., Department of Internal Medicine, Dr. Soetomo Hospital, Universitas Airlangga, Surabaya, Indonesia; Dachlan, Y.P., Department of Parasitology, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia; Suryokusumo, G., Department of Occupational Health, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia; Loeki Enggar Fitri, R., Department of Parasitology, Faculty of Medicine, Universitas Brawijaya, Malang, Indonesia; Yudo, V., Department of Microbiology, Faculty of Medicine, Hang Tuah University, Surabaya, Indonesia