RESUMEN
In the United States, outbreaks of avian influenza H5 and H7 virus infections in poultry have raised concern about the risk for infections in humans. We reviewed the data collected during 2014-2017 and found no human infections among 4,555 exposed responders who were wearing protection.
Asunto(s)
Virus de la Influenza A , Gripe Aviar/epidemiología , Gripe Aviar/virología , Enfermedades de las Aves de Corral/epidemiología , Enfermedades de las Aves de Corral/virología , Animales , Brotes de Enfermedades , Historia del Siglo XXI , Virus de la Influenza A/clasificación , Gripe Aviar/historia , Aves de Corral , Enfermedades de las Aves de Corral/historia , Vigilancia en Salud Pública , Estados Unidos/epidemiologíaRESUMEN
Newly emerged highly pathogenic avian influenza (HPAI) A H5 viruses have caused outbreaks among birds in the United States. These viruses differ genetically from HPAI H5 viruses that previously caused human illness, most notably in Asia and Africa. To assess the risk for animal-to-human HPAI H5 virus transmission in the United States, we determined the number of persons with self-reported exposure to infected birds, the number with an acute respiratory infection (ARI) during a 10-day postexposure period, and the number with ARI who tested positive for influenza by real-time reverse transcription PCR or serologic testing for each outbreak during December 15, 2014-March 31, 2015. During 60 outbreaks in 13 states, a total of 164 persons were exposed to infected birds. ARI developed in 5 of these persons within 10 days of exposure. H5 influenza virus infection was not identified in any persons with ARI, suggesting a low risk for animal-to-human HPAI H5 virus transmission.
Asunto(s)
Subtipo H5N1 del Virus de la Influenza A/patogenicidad , Subtipo H5N2 del Virus de la Influenza A/patogenicidad , Gripe Aviar/transmisión , Gripe Humana/transmisión , Animales , Aves/virología , Enfermedades Transmisibles/diagnóstico , Enfermedades Transmisibles/epidemiología , Enfermedades Transmisibles/transmisión , Brotes de Enfermedades , Humanos , Gripe Aviar/epidemiología , Gripe Aviar/patología , Gripe Aviar/virología , Estados Unidos/epidemiologíaRESUMEN
During December 15, 2014-January 16, 2015, the U.S. Department of Agriculture received 14 reports of birds infected with Asian-origin, highly pathogenic avian influenza A (HPAI) (H5N2), (H5N8), and (H5N1) viruses. These reports represent the first reported infections with these viruses in U.S. wild or domestic birds. Although these viruses are not known to have caused disease in humans, their appearance in North America might increase the likelihood of human infection in the United States. Human infection with other avian influenza viruses, such as HPAI (H5N1) and (H5N6) viruses and (H7N9) virus, has been associated with severe, sometimes fatal, disease, usually following contact with poultry.