What is H5N1 and H7N9?
Vectors of disease differ Influenza A(H5N1) is a high pathogenicity strain for poultry, meaning that many poultry become ill and many die. Therefore, outbreaks in poultry rapidly become apparent. In contrast, A(H7N9) is a low pathogenicity strain and poultry do not become sick.
What class of virus is H7N9?
Novel H7N9 virus is an avian influenza virus. Human infections with an Asian lineage avian influenza A (H7N9) virus (“Asian H7N9”) were first reported in China in March 2013.
Where did the Spanish flu come from China?
He found archival evidence that a respiratory illness that struck northern China (where the laborers came from) in November 1917 was identified a year later by Chinese health officials as identical to the Spanish flu. However, no tissue samples have survived for modern comparison.
WHO H7N9 human cases?
During the fifth epidemic, from October 1, 2016 through September 30, 2017, the World Health Organization (WHO) reported 766 human infections with Asian H7N9 virus , making it the largest H7N9 epidemic to date.
What is the new bird flu?
Since February, the H5N1 virus has been detected in commercial and backyard flocks in at least 17 states, according to data from the U.S. Department of Agriculture, making it the worst bird flu outbreak since 2015, when nearly 50 million birds were slaughtered or died.
Who did the Spanish flu start?
Scientists still do not know for sure where the Spanish Flu originated, though theories point to France, China, Britain, or the United States, where the first known case was reported at Camp Funston in Fort Riley, Kansas, on March 11, 1918.
¿Cuál es el potencial pandémico de la gripe aviar?
A finales de mayo, dos expertos chinos, Gao Fu y Shi Weifeng, alertaban en la revista ‘Science’ del potencial pandémico de otro subtipo de la gripe aviar: el H5N8.
¿Cómo afecta la gripe aviar y porcina a los humanos?
Los virus de la gripe aviar y porcina y otros virus gripales de origen zoonótico pueden afectar a los humanos, causando enfermedades que van desde infecciones leves de las respiratorias superiores (fiebre y tos) hasta neumonía, choque séptico, síndrome de distrés respiratorio agudo o incluso la muerte.
¿Cuáles son los factores de riesgo de infección por la gripe aviar?
El principal factor de riesgo de infección humana por los virus de la gripe aviar parece ser la exposición directa o indirecta a aves de corral infectadas, enfermas o muertas, o a entornos contaminados como los mercados de aves vivas.
¿Cuáles son los diferentes tipos de virus de la gripe aviar?
Otros virus de la gripe aviar, en particular los virus A (H7N7) y A (H9N2), han provocado infecciones humanas esporádicas. Algunos países han notificado también infecciones humanas esporádicas por virus de la gripe porcina, en particular de los subtipos A (H1) y A (H3).