Abstract Fish transportation is a regular farming and experimental practice that mainly results in stress conditions may extend to induce high mortality rate. In the present simulation, Oreochromis niloticus were transported for 2 h maintained another 6 containers assess effect of tranquilization with tricaine methanesulfonate (MS-222) and/or addition iodine on rate restoring normal physiological functions. Experimental fish divided into four groups: group 1 (control) was farm water without...

Omphalitis is a hatchery-borne disease responsible for first-week chick mortality.The present study aimed to isolate and investigate the antimicrobial resistance profile of bacteria causing omphalitis in broiler farms then antibacterial properties chitosan nanoparticles against isolated bacteria.In this study, 100 living diseased chicks were collected from 10 chicken farms.Overall, 86 bacterial isolates successfully recovered identified as 44 E. coli, 21 Salmonella, 13 Pseudomonas, 8...

The present study aimed to determine the major cause of high mortality affecting farmed gilthead seabream (Sparus aurata) and controlling this disease condition. Fifteen diseased S. aurata were sampled from a private fish farm located at Eldeba Triangle, Damietta, showed external skin hemorrhages, ulceration. Bacterial isolates retrieved identified biochemically as Pseudomonas putida then confirmed by phylogenetic analysis 16 S rRNA gene sequence. P. was also isolated three batches...

The current study was conducted to determine the bacterial pathogens incorporated in mass mortality observed cultured Oreochromis niloticus farms at Kafrelsheikh province, Egypt, during summer season of 2015.Moribund fish samples were collected from six infected farms.General signs septicemia dominant clinical and gross internal examination diseased fish.The pathogenic bacteria isolated on specific media then confirmed by polymerase chain reaction (PCR).Out thirty isolates, nineteen...

This study was carried out to identify isopod species implicated in the outbreak that had affected commercially important fishes of Lake Qaroun. The also aims determine its deleterious effects on infested fish and possible role severe drop lake fisheries production. Renocila thresherorum (Crustacea: Isopoda: Cymothoidae) only isolated from lake. overall prevalence 38% as 37.14, 25.7 53.3% examined Tilapia zilli (Gervais, 1848), Mugil capito (Cuvier, 1829) Solea aegyptiaca (Chabanaud, 1927),...

This study aimed to identify the pathogenic bacteria responsible for septicemic disease affecting white sea bream brooders and determining sensitivity of recovered isolates different antibiotics followed by estimation long-acting oxytetracycline (OTC) efficacy in controlling this disease, finally, proper dose regimen.Biolog microbial identification system was used determination pathogens which are disease. Agar disk diffusion test minimum inhibitory concentration (MIC) were determine...

An outbreak recorded in Tilapia farms Kafrelsheikh governorate with high mortalities ranged between 30-70 % the summer season of 2014. This study was conducted for isolation and identification causative agent responsible four fish farms. Twelve Aeromonas isolates were identified by PCR using species primer at molecular weight (953 bp) then all strains also confirmed as hydrophila specific-16S rRNA gene (103 bp).

During this study, 20 % mortality was recorded in Dicentrarchus labrax brood stock marine hatchery of National Institute Oceanography and Fishery at Alexandria province. Observed clinical signs were decrease appetite, off-food, skin ulcerations tail erosions. The main post mortem lesion enlarged liver with presence hemorrhagic foci. Seven bacterial isolates recovered by initial isolation on typtic soy agar media from topical lesions (skin, musculature tail) internal organs (heart, liver,...

Abstract Aeromonas septicemia still represents a serious challenge facing the global aquaculture sector. In present study, caviae and A. veronii were isolated from four diseased European seabass ( Dicentrarchus labrax ) farms experiencing high mortality rate. Diseased fish showed haemorrhages on external body surface with exophthalmia, cataracts, scale desquamation, skin ulcers fin erosions. The most common post‐mortem findings congested internal organs, particularly liver posterior kidney....

The present work aimed to investigate the causes of summer mortality syndrome affecting cultured European seabass ( Dicentrarchus labrax ) by examining physiochemical farm water characteristics, isolation, and identification recovered bacterial pathogens from diseased fish studying effect temperature on stress biomarkers disease severity. Studied parameters were normal except ammonia dissolved oxygen was higher lower than standard value. Sixty-two isolates moribund identified as 31 Vibrio...

Background and Objective: Summer mortality considered a well-established phenomenon affecting cultured tilapia farms allover Egypt in the past 5 years.The present study was undertaken for determining pathogenic bacteria incorporated this seven using rapid diagnostic technique.Materials Methods: Thirty-five clinically diseased Nile were sampled clinical, gross internal pathological lesions followed by isolation automatic biochemical identification recovered isolates VITEK 2 system.Antibiotic...

Streptococcosis became one of the most dangerous bacterial diseases affects cultured marine and freshwater fish. In present study Streptococcus iniae was isolated from diseased Nile tilapia (Oreochromis niloticus) with investigation clinical signs, post mortem lesions focusing on histopathological changes in liver kidney using light Transmission Electron Microscope (TEM). Natural infected O. niloticus showed ascites, exophthalmia, presence hemorrhagic patches all over external body surface...

Enrofloxacin is a broad-spectrum synthetic antimicrobial drug widely used in veterinary medicine. The present study aimed to determine the effective enrofloxacin dose for treating Pseudomonas aeruginosa and Enterococcus faecalis infection Oreochromis niloticus. P. E. isolates were verified using selective differential media biochemically Vitek 2 test. Bacterial virulent O. niloticus with LD50 equal 2.03 × 106 2.22 107 CFU fish−1 faecalis, respectively. Infected fish suffered from decreased...

Abstract Enterococcus faecalis is a newly emerged fish pathogen affecting many cultured species. The present work aimed to determine the cause of mortalities Meagre farm and study infectious agent virulence, disease pathology. Also, influence infection on complement 3, cyclooxygenase, lysozyme gene expression concentrations in serum. internal organs diseased were severely congested with presence petechial haemorrhages liver, gonads, all over elementary tract. Thirty-one bacterial isolates...

Background and Objective: Tilapia hatchery sector at Kafrelsheikh was suffered from increased mortality in newly hatched fry that results severe economic losses, the present research conducted to determine possible causes of affecting two Oreochromis niloticus hatcheries governorate.Materials Methods: A total number 100 tilapia affected were randomly collected for clinical parasitological examination, another 150 naturally infected used treatment trial using Viroscan or formalin-malachite...

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