Studies on Vibriosis among Some Marine Fishes in Lake Temsah

Eissa, Ismail; Aly, Salah M.; Fawzy, Aml

doi:10.21608/scvmj.2017.62369

Cited by 8 publications

(7 citation statements)

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“…The results of intensities of E. faecalis in different internal organs of the infected O. niloticus were nearly similar to those reported by Khafagy et al (2009). Likewise, the intensity of E. faecalis in different organs of the infected M. cephalus showed the same pattern, where gills were the most prominent infected organ (29/82; 35.36%), followed by the kidney (19/82; 23.17), liver (18/82; 21.95%) and spleen (16/82; 19.51), in agreement with Eissa et al (2012). From the pathophysiological point of view, the orientation of these tissues was mainly related to some virulence tools possessed by the bacteria, which enhanced their presence in the detoxifying organ (liver) and the main immune warrior (the kidney; Akter et al, 2020; Eissa et al, 2012; Zahran et al, 2019).…”

Section: Discussionsupporting

confidence: 88%

“…Likewise, the intensity of E. faecalis in different organs of the infected M. cephalus showed the same pattern, where gills were the most prominent infected organ (29/82; 35.36%), followed by the kidney (19/82; 23.17), liver (18/82; 21.95%) and spleen (16/82; 19.51), in agreement with Eissa et al (2012). From the pathophysiological point of view, the orientation of these tissues was mainly related to some virulence tools possessed by the bacteria, which enhanced their presence in the detoxifying organ (liver) and the main immune warrior (the kidney; Akter et al, 2020; Eissa et al, 2012; Zahran et al, 2019).…”

Section: Discussionsupporting

confidence: 88%

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Isolation and identification of Enterococcus faecalis from cultured Oreochromis niloticus and Mugil cephalus with a special emphasis on a possible integrated control strategy

Hassan

Abdel‐Naeim

Mabrok

et al. 2022

Aquaculture Research

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Aquatic diseases are of the most critical issues facing the fish industry worldwide. Diseases are not often a single event, but definitive sequelae to a simultaneous reaction between several events, including pathogens, fish and environmental conditions (Mabrok et al., 2020;Wedemeyer, 1996). Fish intensification and aquaculture expansion are required to maximize yield and profits (FAO, 2017), which might result in water deterioration, environmental pollution and the emergence of many threatening pathogens (Gorlach-Lira et al., 2013).Interestingly, it was estimated that the annual losses in fish production, which represent 10%, are due to diseases and more than 50% of these losses are mainly due to bacterial pathogens (Mabrok, 2016). Streptococcus sp. is perceived as the major causative agent of fish streptococcosis; however, Lactococcus, Vagococcus and Enterococcus are also included amongst the aetiological agents of streptococcosis disease affecting fish (Mishra et al., 2018;

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 88%

Isolation and identification of Enterococcus faecalis from cultured Oreochromis niloticus and Mugil cephalus with a special emphasis on a possible integrated control strategy

Hassan

Abdel‐Naeim

Mabrok

et al. 2022

Aquaculture Research

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“…The clinical examination of naturally infected seabream ( Sparus aurata ) in the current study revealed several characteristic signs, including corneal opacity, redness of the eye and abdominal distension (ascites). These findings are consistent with the observations made by Eissa et al (2013), who reported similar clinical signs in naturally infected seabream. Eissa et al noted the presence of hemorrhages on the external body surface, particularly on the caudal and anal fins.…”

Section: Discussionsupporting

confidence: 94%

Comprehensive analysis of Vibrio alginolyticus: Environmental risk factors in the cultured Gilthead seabream (Sparus aurata) under seasonal fluctuations and water parameter alterations

Aly,

Elatta,

ElBanna

et al. 2023

Journal of Fish Diseases

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This study aimed to investigate the relationship between seasonal variations, water parameters and the prevalence of Vibriosis in Gilthead seabream. A total of 160 Gilthead seabream fish were sampled over the course of 1 year from private earthen pond farms in the Suez Canal area and examined for abnormalities and internal lesions. Vibrio alginolyticus, the causative agent of Vibriosis, was isolated and characterized from the sampled Gilthead seabream fish. The study revealed a significant correlation between different seasons and the prevalence of V. alginolyticus, with lower occurrence during autumn. Analysis of water parameters showed that toxic ammonia concentration was not effective in distinguishing between positive and negative cases of V. alginolyticus. Dissolved oxygen showed weak predictive ability for the occurrence of V. alginolyticus, while temperature demonstrated moderate potential as a predictor of its prevalence. pH values, organic matter concentrations and salinity showed no significant association with the occurrence of V. alginolyticus. Experimental challenges highlighted the vulnerability of Gilthead seabream to V. alginolyticus and emphasized the impact of environmental factors, such as pH and toxic ammonia, on their mortality and survival. The study emphasizes the importance of considering seasonal changes and water quality parameters in managing V. alginolyticus in mariculture. It underscores the need for careful monitoring and control of environmental factors to ensure the health and well‐being of cultured fish populations. The findings contribute to our understanding of Vibriosis management and provide valuable insights for developing effective strategies in the aquaculture industry.

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“…Postmortem findings herein aligned with previous studies [ 17 , 50 ]. Additionally, the P.M lesion was evident histopathologically, where the liver and kidney showed severe congestion, hemolysis, and hemosiderosis (macrophages engulfed hemosiderin), confirming a subclinical Vibrio infection [ 51 ], which were in line with previous studies [ 50 , 52 , 53 ]. Postmortem lesions can be associated with pathogen invasion and release of extracellular metabolites, mainly bacterial hemolysins that cause lysis of erythrocytes and release intracellular hem; therefore, they are considered the main virulence factors that mostly contribute to signs of hemorrhagic septicemia.…”

Section: Discussionsupporting

confidence: 88%

Prevalence, genetic diversity, and antimicrobial susceptibility of Vibrio spp. infected gilthead sea breams from coastal farms at Damietta, Egypt

Ismail,

El-Son,

El-Gohary

et al. 2024

BMC Vet Res

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Background Vibriosis is one of the most serious bacterial diseases and causes high morbidity and mortality among cultured sea breams. This study was undertaken to track the surveillance of Vibrio infection and its correlation to environmental factors. A total of 115 gilthead sea breams were collected seasonally from a private earthen pond fish farm in the Shatta area of Damietta, Egypt from September 2022 to July 2023. Physicochemical parameters of water were analyzed, and heavy metal levels were measured. The fish samples were subjected to clinical, bacteriological, Enterobacterial Repetitive Intergenic Consensus (ERIC) fingerprinting, and hematoxylin and Eosin histopathological staining. Results The results revealed significant variations in the water quality parameters over different seasons, in addition to an increase in heavy metals. Naturally infected fish showed external signs and postmortem lesions that were relevant to bacterial infection. Two dominant Vibrio subspecies of bacteria were identified: V. alginolyticus (205 isolates) and V. fluvialis (87 isolates). PCR confirmed the presence of V. alginolyticus using the species-specific primer collagenase at 737 bp. The highest prevalence of V. alginolyticus was detected during the summer season (57.72%), and the lowest prevalence was observed in autumn (39.75%). The correlation analysis revealed a positive relationship between V. alginolyticus and water temperature (r = 0.69). On the other hand, V. fluvialis showed a high prevalence during the autumn season (25.30%) and the lowest prevalence during the summer season (10.56%), where it was negatively correlated with water temperatures (r =—0.03). ERIC fingerprinting showed genetic variation within the Vibrio isolates. Antimicrobial susceptibility testing revealed sensitivity to ciprofloxacin and doxycycline, and resistance to amoxicillin and erythromycin. The multiple antibiotic resistance (MAR) index values for V. alginolyticus and V. fluvialis ranged from 0.3 to 0.7, with a multi-drug resistance pattern to at least three antibiotics. Histopathological alterations in the affected tissues revealed marked hemorrhage, vascular congestion, and hemosiderosis infiltration. Conclusion This study provides insights into the potential propagation of waterborne diseases and antibiotic resistance in the environment. Ensuring that the environment does not serve as a reservoir for virulent and contagious Vibrio species is a critical concern for regional aquaculture industries. Therefore, we recommend implementing environmental context-specific monitoring and surveillance tools for microbial resistance.

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Studies on Vibriosis among Some Marine Fishes in Lake Temsah

Cited by 8 publications

References 0 publications

Isolation and identification of Enterococcus faecalis from cultured Oreochromis niloticus and Mugil cephalus with a special emphasis on a possible integrated control strategy

Isolation and identification of Enterococcus faecalis from cultured Oreochromis niloticus and Mugil cephalus with a special emphasis on a possible integrated control strategy

Comprehensive analysis of Vibrio alginolyticus: Environmental risk factors in the cultured Gilthead seabream (Sparus aurata) under seasonal fluctuations and water parameter alterations

Prevalence, genetic diversity, and antimicrobial susceptibility of Vibrio spp. infected gilthead sea breams from coastal farms at Damietta, Egypt

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