Medical Science
Volume 24, Issue 102, March - April, 2020
Use of microalgae in control of mycotic infections in pre-mature cultured Sea bass, Dicentrarchus labrax, Sea bream and Mugil cephalus at Ismaillia
Ahmed I.E. Noor El-Deen1, Hussien A.M. Osman1, Mona S. Zaki1, Ismael A.M. Eissa2
1Hydrobiology Department, National Research Centre, Dokki, Giza, Egypt
2Faculty of Veterinary Sciences, Suez Canal Unveristy, Ismaillia, Egypt.
ABSTRACT
The aim of this work was to understand the effects of supplementing microalgae in the diets of some Mediterranean fish species,
gilthead, sea bream (S. aurata), sea bass (D. labrax) and mullet (M. cephalus). Studying most prevailing mycotic diseases of examined
fishes and evaluates the effects of microalgae on mycotic diseases control. Fishes were collected from different fish ponds and
localities at Fish Research Center at Ismailia governorate; they were clinically and post mortem examined. A total of 1080 premature
fishes from as (360 D. labrax, 360 Sparus aurata and 360 Mugil cephalus were obtained from private marine fish farms at Ismailia
province. Fishes were randomly distributed in triplicate into three treatment groups and non treated groups for examined fish
infections in the Fish Nutrition Laboratory, Research Center, Ismaillia. Treatments were performed in 12 cement ponds, at a rate of
90 fish / pond. Rhodotorula glutinis and Icthyophonus hoferi were isolated from infected fishes. Infected fishes were clinically
appeared with cornieal opacity and respiratory distressed with puged eyes and nervous manifestation. It was concluded that
Addition of Micro algae played on important role in prevalence of fish diseases of the the examined fishes. It was concluded that the
addition of a concentration 3g/kg diet is adviced to be used in cultured marine fishes (D. labrax, S. aurata and M.cephalus). It’s
promising for protection against mycotic infections when obtained in diet and increase their resistance against invading mycotic
pathogens enhancing disease and stress resistance.
Keywords: microalgae; mycotic diseases; Rhodotorula; icthyophones; histopatholgy; treatment.
Medical Science, 2020, 24(102), 717-724
