Isolamento de Streptococcus agalactiae em diferentes órgãos de tilápias do nilo (Oreochromis niloticus) criadas em tanques-rede

Marcusso, Paulo Fernandes; Eto, Silas F.; Claudiano, Gustavo da Silva; Vieira, Flávia Campos; Salvador, R; Moraes, Julieta Rodini Engrácia de; Moraes, Flávio Ruas de

doi:10.14393/bj-v31n2a2015-22504

Cited by 11 publications

(5 citation statements)

References 24 publications

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“…niloticus with A. hydrophila at sites 1 and 3 with infection rates of 25% and 37.5%, respectively. S. agalactiae has been reported to cause large-scale outbreaks in cultured tilapia Thailand and Latin America (Marcusso et al, 2015). Furthermore, similar to the obtained findings regarding coinfection, Abdelsalam et al, (2017) 2006).…”

Section: Discussionsupporting

confidence: 79%

Prevalence of some Pathogenic Bacteria in Caged- Nile Tilapia (Oreochromis niloticus) and their Possible Treatment

2022

JJBS

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Bacteria are the primary cause of fatal disease outbreaks in aquaculture. Nine fish cages located at three different sites (3 cages/site) in the north Rosetta branch of the Nile River have exhibited high mortality rates. A total of 220 moribund Oreochromis niloticus and fish feed and water samples were examined for pathogenic bacteria in this study. Fish infected with Vibrio parahaemolyticus were located at only site 1 (62.5% infection rate), and Streptococcus agalactiae was isolated from fish at sites 1 and 3 (25% and 37.5% infection rates, respectively). Fish infected with V. parahaemolyticus or S. agalactiae were coinfected with Aeromonas hydrophila. Further investigation revealed that V. parahaemolyticus infection at site 1 may occur via a fish feed that was contaminated with V. parahaemolyticus (the fish feed was containing improperly manufactured marine fish meal). The median lethal dose (LD50) 96h of A. hydrophila, V. parahaemolyticus, and S. agalactiae was 2.4 × 10 5 , 1.9 × 10 5 , and 5.2 ×10 3 colony-forming unit / ml, respectively for O. niloticus (50 ± 2.5 g b.w.) at a water temperature of 25.1 °C ± 1.5 °C. In an indoor experiment, O. niloticus were injected with the LD50 of the isolated bacteria. Florfenicol was found to be superior to ciprofloxacin in treating A. hydrophila and V. parahaemolyticus infection (mortality 13.3 % and 16.7 %, respectively), and ciprofloxacin was found to be more efficient in treating S. agalactiae infection (mortality 13.3%). In conclusion, inappropriately manufactured marine fishmeal was the source of V. parahaemolyticus infection in caged fish. V. parahaemolyticus or S. agalactiae infection co-occurred with A. hydrophila in fish cages containing low-quality water (high unionized ammonia content).

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Section: Discussionsupporting

confidence: 79%

Prevalence of some Pathogenic Bacteria in Caged- Nile Tilapia (Oreochromis niloticus) and their Possible Treatment

2022

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“…As lesões internas são caracterizadas por congestão branquial, hepatomegalia e esplenomegalia acompanhada de congestão, ascite e encefalomalácea (Figura 1) (SALVADOR et al 2003, FIGUEIREDO et al 2006, TRABULSI & ALTERTHUM 2008, MARCUSSO et al 2015.…”

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Infecção por Streptococcus agalactiae em tilápias do Nilo (Oreochromis niloticus)

Marcusso

Salvador

Marinho-Neto

2017

Rev. Ciên. Agrovet.

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RESUMOEsta revisão tem por objetivo proporcionar maior entendimento sobre a estreptococose na criação de tilápias e com isso auxiliar na escolha do melhor método de profilaxia e controle desta enfermidade. Streptococcus agalactiae é um patógeno cosmopolita e o principal agente etiológico de septicemia e meningoencefalite em teleósteos. Surtos provocados por essa bactéria levam a altas taxas de morbidade e mortalidade de peixes, resultando em sérios prejuízos econômicos, especialmente na tilapicultura que é o ramo da aquicultura que mais produz no Brasil. Este trabalho traz as principais características da estreptococose em tilápias do Nilo e sua prevenção pelo uso de vacinas intraperitoneais. Novos estudos devem ser realizados com intuito de esclarecer ainda mais sua patogênese e aperfeiçoar os métodos profiláticos e de controle. PALAVRAS-CHAVE: estreptococose, teleósteos, bacteriose. ABSTRACTThis review aims to provide greater understanding of estreptococosis in reared tilapia and thereby assist in choosing the best method of prevention and control of this disease. Streptococcus agalactiae is a cosmopolitan pathogen and the main etiologic agent of septicaemia and meningoencephalitis in teleost. Outbreaks caused by this bacteria lead to high rates of morbidity and mortality of fish, resulting in serious economic losses, especially in the cage tilapia culture that is a branch of aquaculture which produces most in Brazil. This paper presents the main estreptococosis characteristics in Nile tilapia and its prevention by using intraperitoneal vaccines. Further studies should be conducted with the intention of clarifying its pathogenesis and improving the prevention and control.

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Section: Discussionmentioning

confidence: 52%

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2022

JJBS

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Study areas include cell biology, genomics, microbiology, immunology, molecular biology, biochemistry, embryology, immunogenetics, cell a n d tissue culture, molecular ecology, genetic engineering and biological engineering, bioremediation and biodegradation, bioinformatics, biotechnology regulations, gene therapy, organismal biology, microbial and environmental biotechnology, marine sciences. The JJBS welcomes the submission of manuscripts that meet the general criteria of significance and academic excellence. All articles published in JJBS are peerreviewed. Papers will be published approximately in one to two months after acceptance.

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Isolamento de Streptococcus agalactiae em diferentes órgãos de tilápias do nilo (Oreochromis niloticus) criadas em tanques-rede

Cited by 11 publications

References 24 publications

Prevalence of some Pathogenic Bacteria in Caged- Nile Tilapia (Oreochromis niloticus) and their Possible Treatment

Prevalence of some Pathogenic Bacteria in Caged- Nile Tilapia (Oreochromis niloticus) and their Possible Treatment

Infecção por Streptococcus agalactiae em tilápias do Nilo (Oreochromis niloticus)

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