Molecular characterization of the Newcastle disease virus that caused an outbreak in backyard birds in Costa Rica in 2015
Costa Rica gained its Newcastle Disease Virus NDV-free status with vaccination according to OIE proceedings in 1996, and its declaration as a country free of the velogenic, viscerotropic form of this disease (G/SPS/GEN/119) presented to the World Trade Organization (WTO) in 1999.On April 24th, 2015, SENASA (National Animal Health Service) attended