RESUMEN

Triple-reassortant swine influenza A (H1) viruses, containing genes from avian, human, and swine influenza viruses, emerged and became an outbreak among humans worldwide. Over a 1,000 cases were identified within the first month, chiefly in Mexico and the United States. Here, the phylogenetic analysis of haemagglutin (HA), neuraminidase (NA), and matrix protein (MP) was carried out. The analysis showed that the H1 of this reassortant originated from American pigs, while NA and MP were more likely from European pigs. All of the 2009 isolates appear homogeneous and cluster together, although they are distinct from classical human A (H1N1) viruses.

Asunto(s)

Antígenos Virales/genética , Brotes de Enfermedades , Subtipo H1N1 del Virus de la Influenza A/genética , Gripe Humana/epidemiología , Gripe Humana/virología , Virus Reordenados/genética , Animales , Antígenos Virales/clasificación , Europa (Continente) , Proteína HN/clasificación , Proteína HN/genética , Glicoproteínas Hemaglutininas del Virus de la Influenza/clasificación , Glicoproteínas Hemaglutininas del Virus de la Influenza/genética , Humanos , Subtipo H1N1 del Virus de la Influenza A/clasificación , México/epidemiología , Filogenia , Virus Reordenados/clasificación , Porcinos/virología , Estados Unidos/epidemiología , Proteínas de la Matriz Viral/clasificación , Proteínas de la Matriz Viral/genética