P K Nanda currently working as a Senior Scientist in IVRI Kolkina, India. His research interest is Fish & Fishery Science


Prevalence of zoonotic trematodes in fish, being the second intermediate host, is a cause of concern from public health point of view. In this study, screening of fish samples (387) from local market (205) and wastewater fed-ponds (182) revealed an overall incidence of 9.3 % infection of encysted metacercarial stages of trematodes. Fish from wastewater fed ponds (12.08 %) harboured more trematodes as compared to market places (6.83 %). Prevalence of trematode infection (16.3 %) in fish was highest was during post-rainy (Oct-Jan) season as compared to other which could be attributed to seasonal variation in physico-chemical parameters of water (temperature, alkalinity, nitrate content) and biotic factor (snail availability).
Prevalence of such encysted metacercarial stage of trematodes in fish, widely consumed by people, is a cause of concern from public health point, as its chances of transmission through consumption of raw, semi/undercooked fish /fish product/byproduct is very high. Therefore, adoption of good aquaculture practice (GAP) by farmers coupled with awareness of public through Information, Education and Communication (IEC) campaigns regarding food safety issues is required as a part of control strategies to minimize the risk of trematode infection.