Aeromonas hydrophila in Nile tilapia (Oreochromis niloticus) from Brazilian aquaculture: a public health problem

Rodrigues, Marianna Vaz; Falcone-Dias, Maria Fernanda; Francisco, Claire Juliana; David, Gianmarco Silva; Silva, Reinaldo José da; Júnior, João Pessoa Araújo

doi:10.31783/elsr.2019.514855

Cited by 15 publications

(10 citation statements)

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“…The detailed structure and mechanism of this virus still remains hypothetical. There may be the chances that this infection may become zoonotic like Aeromonas hydrophilla reported by the researchers which is a bacterial pathogen infecting Tilapia [34] by consuming the infected tilapia sh which is a protein rich food produced by many countries including India. There are reports about coinfection of TiLV with Aeromonas hydrophilla in Tilapia of which aeromonas is the zoonotic pathogen [35].…”

Section: Discussionmentioning

confidence: 99%

Tissue tropism of Tilapia Lake Virus infection by experimental route in Tilapines (Oreochromis niloticus)

ArunKumar

Sudhakaran

2023

Preprint

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Aquaculture production sectors are often vulnerable to various aquatic diseases which could be specific to species or climate. Tilapia Lake Virus (TiLV), a virus that only affects Tilapia, has been responsible for recent years' widespread fish death. Understanding both horizontal and vertical routes of viral transmission is crucial in preventing this disease. Since there are studies on TiLV mostly focussed on In Vitro methodology for the experimental infection. However, we demonstrated the horizontal route of transmission by In Vivo method through intraperitoneal injection. The immune genes are highly responsible to evade the viral infection, in the case of TiLV infection, three different immune genes of Tilapia (MYD88, MCP, TNFα) were upregulated along with the viral load. To understand the aetiology of this disease, the viral load at different organs of the infected fish were estimated by Real Time PCR at regular intervals of time till the moribund stage. The immune genes endured a sharp decline in the middle of pathogenesis with the sudden increase of Viral load which made the fishes to attain the moribund stage.

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Section: Discussionmentioning

confidence: 99%

Tissue tropism of Tilapia Lake Virus infection by experimental route in Tilapines (Oreochromis niloticus)

ArunKumar

Sudhakaran

2023

Preprint

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“…In general, the clinical symptoms in the organs as a hemorrhagic septicemia manifestation include ulceration in the eyes, gills, fins, scales, and muscles in the abdominal area. Moreover, hemorrhage is often found in the liver, spleen, intestines, and kidneys when necropsy is performed [23].…”

Section: Discussionmentioning

confidence: 99%

Aerolysin gene characterization and antimicrobial resistance profile of Aeromonas hydrophila isolated from milkfish (Chanos chanos) in Gresik, Indonesia

et al. 2022

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Background and Aim: Motile Aeromonas septicemia is a crucial disease in freshwater fish. Aeromonas hydrophila is a disease agent associated with sporadic fish mortality, food safety, and public health. This study aimed to estimate the prevalence and the presence of the aerolysin gene and antimicrobial resistance profile of A. hydrophila isolated from milkfish in Gresik, Indonesia. Materials and Methods: A total of 153 milkfish gill samples were collected from 16 locations in Gresik and then cultured and identified using biochemical tests. The aerolysin gene was investigated using a polymerase chain reaction, and antimicrobial resistance profiles of the recovered isolates were investigated. Results: Of the 153 examined samples, 35 (22.9%) were confirmed positive for A. hydrophila and 22 (62.9%) presented the aerolysin gene. The recovered isolates were resistant to the following antibiotics: Amoxicillin (62.9%), tetracycline (60%), streptomycin (54.3%), cefotaxime (51.4%), gentamycin (31.4%), kanamycin (28.6%), erythromycin (25.7%), chloramphenicol (20%), and trimethoprim (14.3%). Meanwhile, only ciprofloxacin, nalidixic acid, and imipenem were indicated as susceptible. Conclusion: The presence of the aerolysin gene is vital in determining the virulence of A. hydrophila. The study results indicated a high aerolysin gene prevalence. In addition, this study emphasized antibiotic use monitoring, food safety improvement, and negative impact reduction on human health and the environment.

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“…Aeromonads are also a common cause of disease in tilapia culture, with Nile tilapia among the wide range of fish species affected 20 . Haemorrhages, slow swimming, pop‐eye and reddening skin are the prominent clinical signs seen in most affected tilapia farms 21 …”

Section: Importance Of Emerging and Re‐emerging Diseases In Tilapiamentioning

confidence: 99%

“…20 Haemorrhages, slow swimming, pop-eye and reddening skin are the prominent clinical signs seen in most affected tilapia farms. 21 In addition to bacterial diseases, viral diseases caused by TiLV, [22][23][24][25][26][27][28][29] ISKNV 6,30 and Tilapia parvovirus (TiPV) 31,32 cause high mortalities and negative impacts on the global tilapia industry. 31,32 TiLV or Tilapia tilapinevirus 33 has been extensively studied over the past 5 years.…”

Section: Importance Of Emerging and Re-emerging Diseases In Tilapiamentioning

confidence: 99%

Strategies to enhance tilapia immunity to improve their health in aquaculture

Wang

Thompson

Wangkahart

et al. 2022

Reviews in Aquaculture

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Various emerging and re-emerging diseases, such as streptococcosis, tilapia lake virus disease and infectious spleen and kidney necrosis virus disease, have had a significant economic impact on the tilapia industry over the last decade. These diseases have resulted in high levels of morbidity and mortality, production losses and trade restrictions. In the absence of effective husbandry management, disease prevention strategies and appropriate biosecurity measures, infectious diseases will continue to challenge the sustainability of global tilapia aquaculture. Strategies used to reduce the impact of disease include feeding probiotic and prebiotic supplements to enhance tilapia health and to modulate the fish's gut microbiota to improve gut health. Herbal medicines and immunostimulants are also used to enhance immunity to disease, while vaccines are available, or are under development, for a number of economically important pathogens affecting tilapia culture. This review provides an overview of the benefits of enhancing the immune response of tilapia to improve their health, and in turn reduce the levels of pathogens within tilapia farming systems.

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Aeromonas hydrophila in Nile tilapia (Oreochromis niloticus) from Brazilian aquaculture: a public health problem

Cited by 15 publications

References 0 publications

Tissue tropism of Tilapia Lake Virus infection by experimental route in Tilapines (Oreochromis niloticus)

Tissue tropism of Tilapia Lake Virus infection by experimental route in Tilapines (Oreochromis niloticus)

Aerolysin gene characterization and antimicrobial resistance profile of Aeromonas hydrophila isolated from milkfish (Chanos chanos) in Gresik, Indonesia

Strategies to enhance tilapia immunity to improve their health in aquaculture

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