Efficacy of doramectin against natural and experimental infections of Lernaea cyprinacea in carps (original) (raw)

Therapeutants used for Protozoan Parasitic Diseases in Fishes

Chronicle of Aquatic Science, 2023

Globally, finfish aquaculture is constantly growing in both freshwater and marine environments, and there is clear potential for a significant further growth. When infection intensities in the enclosed aquaculture environment reach high levels, they may then produce disease. The difficulty posed by parasites is further exacerbated by the possibility of parasite transfer from aquaculture operations to wild fish stocks. Veterinarians are responsible for treatment using the prescribed therapeutant on the fish farm and are also involved with the aquaculture operator to ensure that the treated fish or crustaceans are safe for human consumption. The current work describes integrated control techniques, health management and treatment protocols for diseases brought on by protozoan parasites in more detail and promote their usage.

TRIALS TO CONTROL SEA BASS MORTALITIES DUE TO CONCOMITANTLY MICROBIAL AND PARASITIC INFECTION

A total of 60 Sea bass (Dicentrarchus labrax) were collected from a private farm in Fayoum province suffered from cumulative mortality. All fish were subjected to clinical, postmortem, bacteriological, fungal and parasitological examinations with trial for treatment. The identified pathogens with its prevalence rates among the examined fish were Pseudomonas putida (8.5%), Tenacibaculum maritimum (66.4%), Ichthyophonus spp. (60%) and Monogenetic trematodes Diplectamum sp. (100%). Fish were suffered from detached scales with the presence of hemorrhagic patches and fin and tail rot. Before the fish death developed signs of asphyxia and excess mucus production from damaged gills were characteristic signs. The internal organs were congested with ascietic fluid. Antibiogram has revealed that the bacterial isolates were sensitive to Ciprofloxacin. Water samples were examined for confirmation of good husbandry condition and all physicochemical parameters were within the normal ranges advised for fish culture. Results indicated that the naturally infected fish could be treated successfully by Mebendazole (50 mg / Kg Body weight) as single dose for one day and followed by feeding ration containing Ciprofloxacin (150mg/ Kg Body wt) for 10 days. The mortalities were declined. Also, the clinical signs were disappeared and the fish returned to normal state of health. Meanwhile, pathogens were not detected from fish after treatment.