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Comparative pathogenicity of Nocardia seriolae in Nile tilapia (Oreochromis niloticus), milkfish (Chanos chanos) and Asian seabass (Lates calcarifer).
Nazareth, Sandra Celenia; Cheng, Li-Wu; Wang, Pei-Chi; Chen, Shih-Chu.
Afiliación
  • Nazareth SC; Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan.
  • Cheng LW; Department of Veterinary Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan.
  • Wang PC; College of Veterinary Medicine, Southern Taiwan Fish Diseases Research Centre, National Pingtung University of Science and Technology, Pingtung, Taiwan.
  • Chen SC; International Degree Program of Ornamental Fish Technology and Aquatic Animal Health, International College, National Pingtung University of Science and Technology, Pingtung, Taiwan.
J Fish Dis ; 47(7): e13947, 2024 Jul.
Article en En | MEDLINE | ID: mdl-38523361
ABSTRACT
Nocardiosis, caused by Nocardia seriolae, has been a prominent disease in Southeast Asian aquaculture in the last three decades. This granulomatous disease reported in various fish species is responsible for significant economic losses. This study investigated the pathogenicity of N. seriolae in three cultured species in Taiwan Nile tilapia (omnivore), milkfish (herbivore) and Asian seabass (carnivore). Administration of an infective dose of 1 × 106 CFU/ fish in tilapia, seabass and milkfish demonstrated mortalities of 100%, 90% and 75%, respectively. Additionally, clinical signs namely, granuloma and lesions displayed varying intensities between the groups and pathological scores. Polymerase chain reaction (PCR) amplification specific for N. seriolae was confirmed to be positive (432 bp) using NS1/NG1 primers. Post-mortem lesions revealed the absence of granulomas in tilapia and milkfish and their presence in the seabass. Interestingly, the gut in tilapia showed an influx of eosinophils suggesting its role during the acute stages of infection. However, post-challenge, surviving milkfish exhibited granulomatous formations, while surviving seabass progressed toward healing and tissue repair within sampled tissues. Overall, in conclusion, these results demonstrate the versatility in the immunological ability of individual Perciformes to contain this pathogen as a crucial factor that influences its degree of susceptibility.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cíclidos / Enfermedades de los Peces / Nocardia / Nocardiosis Límite: Animals País/Región como asunto: Asia Idioma: En Revista: J Fish Dis Asunto de la revista: BIOLOGIA / MEDICINA VETERINARIA Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cíclidos / Enfermedades de los Peces / Nocardia / Nocardiosis Límite: Animals País/Región como asunto: Asia Idioma: En Revista: J Fish Dis Asunto de la revista: BIOLOGIA / MEDICINA VETERINARIA Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Reino Unido