Alliierte Schulen Graz
H5 N1
H5NI avian influenza is a subtype of the type A influenza virus. Wild birds are the natural hosts of the virus, which circulates among birds worldwide. It is very contagious among birds and can be deadly to birds, particularly domesticated birds like chickens. Infected birds shed virus in saliva, nasal secretions, and feces. Avian influenza viruses spread among susceptible birds when they have contact with contaminated excretions. Since mid-December, outbreaks of influenza A (H5N 1), infection have been detected in the poultry populations of Cambodia, China, Hong Kong (in a single peregrine falcon), Indonesia, Japan, Korea, Laos, Thailand, and Vietnam. The virus does not typically infect humans, but in recent months, Vietnam has reported hospitalized cases of serious respiratory illness, primarily among children, most of whom have died. Thirteen of these patients were confirmed as having avian influenza A (H5Nl), and nine of the confirmed cases have been fatal. The Ministry of Health of Thailand announced four confirmed cases of avian influenza A (H5Nl) in humans; all four of the patients have died. It is believed that most cases ofH5Nl infection in humans have resulted from contact with infected poultry or contaminated surfaces. The incubation period for influenza is one to four days, with an average of two days. Uncomplicated influenza illness is characterized by the abrupt onset of constitutional and respiratory signs and symptoms (e.g., fever, myalgia, headache, severe malaise, nonproductive cough, sore throat, and rhinitis). Among children, otitis media, nausea, and vomiting are also commonly reported characteristics of influenza illness.

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© Teilnehmer des Projektes Allied Schools Graz zuletzt bearbeitet am: 18. Februar 2006