Infection by larval cestodies of the genus paradilepis in cultured Oreochromis niloticus (L.)

Abstract

Helminth infection of cultured Oreochromis niloticus was observed in two farms in Abeokuta, Ogun State and Jos, Plateau State. The parasite was identified as the larva of a cestode of the genus Paradilepis. Eggs and larvae were found under the scales and strongly and deeply embedded in fish body. Larvae measured between 5-6 mm in length and 2.5 – 3.0 mm in diameter while eggs measured 2.5 – 30 mm in diameter. Adults had the highest percentage infection (80%) in both Ogun and Plateau States, while sub-adults and juveniles had 60.5% infection respectively. The percentage infection in both farms was 55.6%. The parasite burden in Plateau State was higher (64%) than in Ogun State (35.9%).


Key words: Infection, Cestodes, Oreochromis niloticus


Journal of Aquatic Sciences Vol.17(1) 2002: 60-62