Department of Biology, Ethiopia
Aeromonas Septicemia Infection in Cultured Nile tilapia, Oreochromis niloticus L.
Author(s): Kassaye Belkew Workagegn*
The study was conducted at Gudar Experimental Aquaculture farm, from November 2011 to March 2012. The main objectives of the present study were to investigate host-parasite relationship of Aeromonas bacteria in Nile tilapia (Oreochromis. niloticus) in aquaculture production system and evaluate pathogenicity and hematological change through experimental infection. The bacterial isolates were identified according to the biochemical reactions scheme. The pathogenicity test was performed for Aeromonas bacteria through intra-peritonium injection (IP) using 21/gauge sterile needle at ventral parts of the body of experimental fish. After 24 hours post injection of bacteria (1.4 x 106 CFU ml-1), all fish fingerlings became less active, showed decreased feeding rate and erratic swimming behavior, and remained at the bottom of the aquarium. External clinical signs observed were darkened dorsal .. Read More»