00000ntmaa22000003a 4500 UP-8027295163992910365 Buklod 20241001151915.0 t r |||| u| ta 241001s2024 xx a b ||| u eng UPVT-00020032565 UPTC rda eng LG 995 2024 E5 A23 Abarsosa, Charo C. author. An assessment of the present state of selected irrigation canals for Schistosomiasis control towards development of a GIS-based surveillance tool in Palo, Leyte, Philippines Charo C. Abarsosa; Eulito V. Casas, adviser. 2024 xiii, 117 leaves illustrations. text rdacontent unmediated rdamedia rdacarrier Master's thesis (M.S. Environmental Science) -- University of the Philippines, Tacloban. This study assessed the current conditions of selected irrigation canals in Brgy. Anahaway, Palo Leyte to control schistosomiasis transmission. A systematic malacological surveillance using the one-man hour sampling, and the measurement of the physicochemical parameters were conducted throughout the selected irrigation canals. The knowledge, attitudes, practices and perceptions, and key informant interviews were categorized using a dichotomous survey questionnaire, and the data for the GIS map were obtained from secondary sources. The irrigation canals showed a favorable habitat for the Oncomelania hupensis quadrasi snails to thrive. The highest snail density is 7.62 snail/m² and the highest snail infection rate is 2.17, both observed in upstream station. The snail population density in two stations (middle stream and upstream) suggests local transmission. A negative correlation was observed in water pH (r value-0.44; p-value-2.65x10^-3), and water velocity (r value= -0.41; p- value=2x10^-3), and a positive correlation was observed in water EC (r value=0.37;p- value-0.01), salinity (r value-0.48; p-value=7.6x10^-4), TDS (r value-0.41; p- value=0.01), and soil temperature (r value-0.61; p-value=). Other parameters showed no correlation, but mean values indicated that it may have contributed to the existence of the snails. Results on the KAPP survey indicated that the community is dependent on the water resource from the irrigation canal for agricultural purposes. It revealed that the respondents' water contact activities are unavoidable hence, the continued transmission. The KII highlighted mass drug administration (MDA), proper sanitation, and health education in preventing the spread of the disease which helped in the creation of a GIS Map that visualized the MDA percentage. The visualization simplifies the analysis of data on the probabilities of active reinfection that can sustain the life cycle of S. japonicum. The maps that include sanitation coverage and land cover provides proper intervention to minimize, if not curtail, the spread of schistosomiasis. Casas, Eulito V. adviser. Thesis FI UP UPTAC UPTAC LG 995 2024 E5 A23 Thesis