Twenty individuals of rainbow trout were sampled (fry and juveniles) from Acochinchan Fishfarm (Canta, Lima - Peru), and analyzed with the Polimerase Chain Reaction test (PCR ) in order to achieve a rapid identification of Yersinia ruckeri, which is the pathogen agent that causes the enteric red mouth disease (ERM) and produces high rates of mortality. Nine fish samples were asymptomatic, while 11 of them showed signs of ERM. In addition, 22 bacterial strains were isolated from the liver, spleen and kidney. PCR and specific primers (16S rRNA), were used to amplified a specific 575 bp DNA fragment of Yersinia ruckeri. Nineteen strains were identified as Yersinia ruckeri by PCR in symptomatic and asymptomatic fishes. It was established a diagnosis time of 26 hours, compared with the 2 or 3 days that would take the diagnosis using biochemical tests.

Se muestrearon 20 ejemplares (alevines y juveniles) de trucha arco iris cultivados en la piscifactoría Acochinchán (Canta, Lima, Perú), y se les aplico la técnica de la Reacción en Cadena de la Polimerasa (PCR) con la finalidad de obtener una identificación rápida del agente patógeno Yersinia ruckeri que produce la enfermedad entérica de la boca roja (ERM) y genera elevadas tasas de mortalidad. Nueve ejemplares fueron asintomáticos mientras que 11 presentaron signos de ERM. Se aislaron 22 cepas bacterianas del hígado, bazo y riñón. Se empleó la técnica de la PCR para la amplificación y cebadores específicos (ARNr 16S), que permitieron amplificar un fragmento de ADN de 575 pb de Yersinia ruckeri. Diecinueve cepas fueron identificadas como Yersinia ruckeri mediante la PCR, tanto en peces sintomáticos como asintomáticos. Se estableció un tiempo de diagnóstico de 26 hora...

The aim of this study was to evaluate the antibacterial activity of methanol and methanol-chloroform extracts of tegument, gonad and viscera of Pattalus mollis. Fifty specimens were collected in the Pucusana Bay, Peru, dissected longitudinally through the ventral area of ​​the tegument and the internal organs (viscera, gonad) were removed. The samples were dried to 10% moisture, milled and stored in freezing. The extracts were obtained by maceration using methanol and chloroform. The in vitro evaluation was performed using the broth microdilution method, the extracts were diluted in seven concentrations (3.9-250 mg/ml) and evaluated against Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 14775 and Vibrio alginolyticus ATCC 17749. The methanol extract showed bacterial inhibition against the three bacteria, demonstrating a bactericidal and bacteriostatic effect against Gr...

The aim of this study was to evaluate the antibacterial activity of methanol and methanol-chloroform extracts of tegument, gonad and viscera of Pattalus mollis. Fifty specimens were collected in the Pucusana Bay, Peru, dissected longitudinally through the ventral area of ​​the tegument and the internal organs (viscera, gonad) were removed. The samples were dried to 10% moisture, milled and stored in freezing. The extracts were obtained by maceration using methanol and chloroform. The in vitro evaluation was performed using the broth microdilution method, the extracts were diluted in seven concentrations (3.9-250 mg/ml) and evaluated against Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 14775 and Vibrio alginolyticus ATCC 17749. The methanol extract showed bacterial inhibition against the three bacteria, demonstrating a bactericidal and bacteriostatic effect against Gr...