Aislamiento y detección molecular de cepas emergentes del virus de la diarrea epidémica porcina en Lima, Perú

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Resumen

In 2013, clinically suggestive cases of PEDv were reported in pig farms in Lima and Arequipa, reaching up to 100% mortality in piglets and negative results to other viral agents such as classical swine fever (CPPv) and transmissible gastroenteritis (TGEv). For this reason, the aim of this study was to isolate and molecularly detect PEDv strains in Lima pig farms. A total of 37 stool samples and intestinal contents of piglets between 2 and 21 days of age with clinical signs suggestive of PEDv from pig farms of the department of Lima, Peru were collected. Results showed that 94.3% (35/37) were positive by the immunochromatography (IHC) test; 97.1% (34/35) of them were confirmed by RT-PCR real-time that amplified a 101-bp segment of the ORF3 gene of the PEDv. The control and positive samples showed a threshold cycle (Ct) between 10 and 21 cycles with a melting temperature (Tm) of 77.7 °C. There was no amplification of TGEv or PPCv used as negative controls. All positive samples were processed for isolation in the VERO-21 cell line supplemented with 20 µg/ml trypsin. The 23.5% (8/34) of the inoculated cells showed rounded shapes and lysis in cell culture between the first and second passage; however, only half (4/8) were confirmed by RT-PCR real-time. This work represents the first isolation of PEDv in Peru using IHC and confirmed by RT-PCR real-time.

Título traducido de la contribuciónIsolation and molecular detection of emerging porcine epidemic diarrhea virus strains in Lima, Peru
Idioma originalEspañol
Páginas (desde-hasta)1010-1019
Número de páginas10
PublicaciónRevista de Investigaciones Veterinarias del Peru
Volumen28
N.º4
DOI
EstadoPublicada - 1 oct 2017

Nota bibliográfica

Publisher Copyright:
© 2017 Universidad Nacional Mayor de San Marcos. All rights reserved.

Palabras clave

  • Cell culture
  • PEDv
  • Porcine epidemic diarrhea virus
  • RT-PCR real-time
  • Virus isolation

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