A survey of epitheliocystis disease in farmed Nile tilapia (<i>Oreochromis niloticus</i>
 Linnaeus, 1758) in Brazil

Pádua, Santiago Benites de; Menezes-Filho, R. N.; Martins, Maurício Laterça; Belo, Marco Antônio de Andrade; Ishikawa, Márcia Mayumi; Nascimento, Camila Aparecida; Saturnino, Klaus Casaro; Mauad, Juliana Rosa Carrijo

doi:10.1111/jai.12840

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…niloticus in Egypt and an unidentified tilapia in Africa has been translocated on O . niloticus and its hybrids to Brazil, 103,105,116–118 Mexico, 103 China, 119 Egypt 120 and Argentina 113 . It is possible that the record of P .…”

Section: Parasitic Infections Of Tilapiamentioning

confidence: 99%

“…112 Ichthyophthirius multifiliis is considered native in most freshwater systems worldwide and it is possible but unlikely that tilapias are responsible for translocating or exacerbating infections on wild, native fish. Brazil, 103,105,[116][117][118] Mexico, 103 China, 119 Egypt 120 and Argentina. 113 It is possible that the record of P. incissa (Lom, 1959), described from European minnows from the skin of O. niloticus in Vietnam and included in the country summary 67 is a misidentification of P. africana.…”

Section: Researchmentioning

confidence: 99%

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A global review of problematic and pathogenic parasites of farmed tilapia

Shinn

Avenant‐Oldewage

Bondad‐Reantaso

et al. 2023

Reviews in Aquaculture

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Over the past 80 years, tilapia have been translocated globally for aquaculture; active production is recorded in >124 countries. Of 7 million tonnes of tilapia produced in aquaculture, 79% is from 79 countries outside the natural range of tilapia. Capture fisheries account for a further 723,627 tonnes of tilapia, and >47% of this is landed from established invasive populations outside Africa. Tilapias host a rich fauna of parasites, many of which have been translocated with their hosts. This review summarises >2500 host–parasite records from 73+ countries and >820 recorded tilapia translocations (provided in the supplementary materials). This work focuses on the notable pathogens that threaten the health of cultured populations of tilapia, providing a description of their pathology and includes species that also have substantial impacts on wild tilapia populations, where relevant. For each major parasite taxonomic group, we highlight which parasites have been translocated or have been acquired from the new environments into which tilapia have been introduced, together with remarks on standard treatment approaches and research on them and their management and control. Regarding the theme ‘Tilapia health: quo vadis?’, Africa has enormous potential for aquaculture growth, but substantial knowledge gaps about tilapia parasites in many African states remain, which creates associated production and biosecurity risks. For each parasitic group, therefore, the risks of parasite translocation to new regions as tilapia aquaculture industries expand are highlighted.

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Section: Parasitic Infections Of Tilapiamentioning

confidence: 99%

Section: Researchmentioning

confidence: 99%

A global review of problematic and pathogenic parasites of farmed tilapia

Shinn

Avenant‐Oldewage

Bondad‐Reantaso

et al. 2023

Reviews in Aquaculture

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“…The larval and juvenile stages of fish are the most strongly affected by these bacteria, resulting in high mortality rates. However, immunosuppressed adults can also be affected, as these animals develop intense mucus production in the infected gills, resulting in respiratory failure and death (Pádua et al, 2015). The presence of epitheliocysts in tilapia may be associated with parasitic infection, as a few studies have suggested that monogeneans, as well as other protozoan parasites, are carriers of these bacteria (Crespo et al, 1990;Crespo, 1995, Pádua et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Environmental factors can affect the relationship between Nile tilapia and its parasites in cage systems culture

Pala¹,

Pahor-Filho²,

Costa³

et al. 2022

Braz. J. Anim. Environ. Res.

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Parasites represent a serious obstacle in Brazilian intensive fish farming, and then, monitoring parasitic infestations in aquaculture is a duty of every tilapia producer. The objective of this study was to identify the branchial ectoparasites of Nile tilapia, evaluate the correlation between parasitic intensity, host biometrics, and limnological variables, as well as to identify gill histological changes in fish. Thus, fish representing the three phases (I, II, and III) of production were collected in two commercial fish farms - 1 and 2, necropsied, and their parasites quantified and identified. The gill alterations were processed for histological analysis. Cichlidogyrus sclerosus and Scutogyrus longicornis (Monogenoidea), and Lamproglena monodi (Lernaeidae) have been identified in the tilapia gills. The highest intensities of Monogenoidea infestation were in summer and autumn in both fish farms, with a positive correlation between parasites and water temperature. Infestation by L. monodi occurred only in Fish farm 2, with greater infestations in winter and spring, with a negative correlation between water temperature and parasitism. There was also an increase in parasitism according to the weight and length of the fish in the two fish farms. Histological changes such as hyperplasia, lamellar hypertrophy, and the presence of basophilic cysts on the secondary lamellae were detected in tilapia. Thus, water quality parameters and season of the year, which are closely related, can affect communities of parasites that infest Nile tilapia grown in cages. These findings are important to assist in planning disease control and prevention strategies for Nile tilapia fish farming, to reduce economic losses resulting from fish diseases and death.

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“…In South America, tilapia production has grown in the last decades (1). The cichlids present notably characteristics for production, such as rapid growth, tolerance to a wide range of environmental conditions, available for eating a variety of foods, white meat and relatively low production costs (2,3).…”

Section: Introductionmentioning

confidence: 99%

“…En América del Sur, la producción de tilapias ha crecido en las últimas décadas (1). Estos ciclídeos presentan características notables de producción, como rápido crecimiento, tolerancia a amplios rangos de condiciones ambientales, disponibilidad en comer gran variedad de alimentos, producción de carne blanca y relativo bajo costo de producción (2,3).…”

Section: Introductionunclassified

Estreptococos beta-hemolítico en tilapias del Nilo (Oreochromis niloticus) cultivadas en Sullana, Piura - Perú

et al. 2017

Rev MVZ Córdoba

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Objective. This investigation aimed to study the presence of Streptococcus spp. in tilapia (Oreochromis niloticus) from fish farm located in Sullana-Piura, Peru. Materials and methods. 150 fish with clinical signs of streptococcal disease were sampled, and the bacterium isolation was performed on blood agar, correlated to histopathological lesions description and molecular confirmation by real-time PCR. Results. The necropsy revealed exophthalmia, hyphema, congestion and/or haemorrhagic meninges, ascites, splenomegaly, hepatomegaly and diffuse haemorrhagic zones throughout the body. 102 isolated positives (54 tilapias) to Streptococcus spp. were identified in the microbiological analysis (prevalence of 26%), the brain was the organ with the highest percentage of this bacteria (34.31%), and 19 isolates were beta-haemolytic (18.63%) with prevalence of 10.12%. Fish beta-haemolytic streptococci presented epicarditis, perisplenitis and chronic meningitis, panophthalmitis, coagulative necrosis of skeletal muscle and granulomas formation. In the confirmatory test by real-time PCR, any positive tilapia to S. iniae was obtained. The results were analysed using a stochastic simulation of beta distribution using @Risk program uncertainty, reporting an average prevalence of 0.66% in sick tilapias. Conclusions. The analysed fishes were positive to bacteria of the genus Streptococcus, which confirms its presence in the fish farm. However, 19 isolates were beta-haemolytic, and the presence of S. iniae was not positive to the limit prevalence of 2.7% in real-time PCR.Keywords: Cichlids, histopathology, microbiology, PCR, teleost fish (Source: DeCS, CAB, MeSH). Beta-haemolytic streptococci in farmed RESUMENObjetivo. Esta investigación objetivó estudiar la presencia de Streptococcus spp. en tilapia (Oreochromis niloticus) de la piscifactoría localizada en Sullana-Piura, Perú. Materiales y Métodos. 150 peces con signos clínicos de la enfermedad estreptocócica fueron analizados, el aislamiento bacteriano se realizó en agar sangre, en correlación con las lesiones histopatológicas y diagnóstico molecular mediante PCR en tiempo real. Resultados. A la necropsia se observó exoftalmia, hifema, congestión y/o meninges hemorrágicas, ascitis, esplenomegalia, hepatomegalia y zonas hemorrágicas difusas en todo el cuerpo. 102 aislados positivos (54) tilapias para Streptococcus spp. fueron identificados en el análisis microbiológico (prevalencia del 26%), el cerebro fue el órgano con el más alto porcentaje del género de esta bacteria (34.31%), 19 aislados fueron beta-hemolítico (18.63%), con prevalencia de 10.12%. Peces con Streptococcus beta-hemolíticos presentaron epicarditis, perisplenitis y meningitis crónica, panoftalmitis, necrosis coagulativa del músculo esquelético y formación de granulomas. En el análisis de PCR en tiempo real, no se obtuvo ninguna tilapia positiva para S. iniae. Los resultados se analizaron mediante una simulación estocástica de la distribución beta usando el programa de incertidumbre @Risk, reportando una pr...

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A survey of epitheliocystis disease in farmed Nile tilapia (Oreochromis niloticus Linnaeus, 1758) in Brazil

Abstract: 930S. B. P adua et al.

Cited by 8 publications

References 16 publications

A global review of problematic and pathogenic parasites of farmed tilapia

A global review of problematic and pathogenic parasites of farmed tilapia

Environmental factors can affect the relationship between Nile tilapia and its parasites in cage systems culture

Estreptococos beta-hemolítico en tilapias del Nilo (Oreochromis niloticus) cultivadas en Sullana, Piura - Perú

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