RDSP conceptualized the study design and provided materials for the fieldwork. CIHD, DRDC, GAV and JFW collected the water samples and processed the samples in the laboratory including sorting, identification, preparing of voucher specimens and wrote the first version of the manuscript. MLL and ESPDP helped in the sample collection and identification of the specimens. ESPDP, MLL and RDSP did the analysis and wrote the final version of the manuscript.