Bacterial Fish Diseases in some Semi-close Aquaculture Systems in Basrah Province, Iraq

The object of this study was to detect the bacterial species that founded in infected common carps Cyprinus carpio in semi-closed systems in two districts of Basrah province. Bacterial gill disease, skin ulcer disease and intestine inflammatory disease were recorded. In the present study, Aeromonas sobria (38.46) was the predominant species, followed by Citrobacter freundii (29.23), Vibrio cholerae (21.53) and Serratia fonticola (10.76%). Identification of the isolates was carried out depending on the morphology of colony, specific media and identification using VITEK 2 system (Biomerieux- USA). Five antibiotic discs were used for antibiotic sensitivity test by the disk diffusion method. A. sobria was sensitive to Nitrofurantion, V. cholerae was sensitive to Ampicillin, C. freundii was resistance for all antibiotics while S. fonticola was sensitive to Gentamicin. This study represented the first investigation in Iraq on bacterial isolates from semi- closed system.

Fish diseases in carp fish ponds and implementation of health care measures

Fish health protection is a complex and permanent measure veterinary specialists are taking in order to preserve and improve breeding and production of particular fish species and categories. The system of monitoring fish health should ensure early detection of disorders in fish health and the presence of causing agents. In order for the monitoring to be efficient it should be practiced in accordance with the specific conditions of each system and breeding venues, as well as to the specific health problem needs of different farmed fish species. The most important issue in fish diseases diagnostics is the systematic monitoring of the condition offish health. Only in such way it is possible to detect a disease on time and then determine the adequate therapeutic and other necessary measures. In dealing with the problems offish pathology in carp fishponds, the epizootical situation of disease spreading caused by different agents (viruses, bacteria, fungi and parasites) has been examined. The most frequent diseases among the farmed carps in the examined fish ponds in Vojvodina area, described in this paper were: carp pox, spring viremia of carp, carp erythrodermatitis, aeromonas and pseudomonas infections, bacterial gill disease, diseases caused by ecto- and endoparasites and gill necrosis. Based on the obtained results, modern diagnostic methods were implemented and proper prevention and successful therapy of the diseases causing the greatest loss in farmed fish populations was taken.