Identification and characterization of Aeromonas caviae isolated from diseased tilapia (Oreochromis niloticus) in intensive culture in Peru

Verónica Sierralta C.; Egma Mayta H.; Jorge León Q.; Rubén Alfaro A. · Revista de Investigaciones Veterinarias del Peru (2025) · DOI: 10.15381/rivep.v36i5.29255

Resumen

The aim of this research was to characterize and identify the bacterium Aeromonas caviae isolated from tilapia (Oreochromis niloticus) cultured using biofloc technology in Lima, Peru, and to describe the tissue lesions caused by this pathogen. Eighty-five specimens were sampled, showing signs of disease such as exophthalmia, melanosis, and erratic swimming. Two bacterial isolates were obtained and characterized using biochemical tests and confirmed as A. caviae by PCR and 16S rRNA gene sequencing. Histopathological findings included pericarditis, myocarditis, and necrosis in the stomach, liver, intestinal villi, pancreas, and anterior and posterior kidney. ©Los autores.

Instituciones: Universidad Nacional Mayor de San Marcos; Universidad Nacional Agraria La Molina