List of ecdc publications and peer-reviewed articles covering avian influenza the 2009 influenza a(h1n1) pandemic was declared over in august 2010 by the world health organization europe has now entered a new inter-pandemic phase of seasonal influenza a pandemic is the rapid spread of a new human. Excerpt research has identified three essential prerequisites for the start of a pandemic: transmission of a novel viral subtype to humans viral replication causing disease in humans and efficient human-to-human transmission of the virus. Summary new lab experiments suggest that the h5n1 avian influenza virus can replicate copiously in the guts of domestic ducks without making them sick. The who established a six phase pandemic alert system in 2005 in response to the potential threat of the h5n1 avian influenza virus the alert system is based on the geographic spread of the virus, not necessarily the severity of disease caused by the virus. Bird flu or avian flu is an infectious disease of birds caused by type a strains of the influenza virus bird flu, which was first identified in italy more than 100 years ago, occurs worldwide fifteen subtypes of influenza virus are known to infect birds, thus providing an extensive reservoir of.
Avian influenza, also called bird flu, is an emerging epidemic disease that is highly contagious, spreads quickly and easily between domestic and wild birds, and it occasionally infects humans, although it is not passed on between humans. Influenza a/h5n1 (avian influenza) has now caused 258 human infections (as of november 13, 2006), with an approximate 50% mortality rate because the virus is novel in terms of antigenic type and causes infection and illness, and because humans have no pre-existing immunity, the conditions for a possible pandemic exist. Influenza a virus subtype h5n1, also known as a(h5n1) or simply h5n1, is a subtype of the influenza a virus which can cause illness in humans and many other animal species a bird-adapted strain of h5n1, called hpai a(h5n1) for highly pathogenic avian influenza virus of type a of subtype h5n1 , is the highly pathogenic causative agent of h5n1.
The avian influenza overview report is published quarterly and provide an update of the developments of avian influenza viruses in eu/eea and worldwide, in particular with a view to describe the evolution of virus spread from certain regions towards the eu. The high mortality associated with some avian influenza a virus infections and the emergence of neuraminidase inhibitor resistance during treatment in severely ill patients with avian influenza a h7n9 virus infection highlight the need to improve clinical management of hospital inpatients with influenza virus infections. The avian flu has been a threat to wild birds and poultry for decades especially chicken, ducks and geese as well as several species of waterfowl have been shown to be infected with different. To address the threat that avian influenza (ai) poses to human health, it is necessary to recognize its broader agricultural and economic implications and to integrate this knowledge into disease control strategies.
Summary: the article presents information on h7n7 as well as other strains of avian influenza viruses the characteristics of the viruses and how the viruses are spread from poultry to humans is discussed and remains unclear. Avian influenza virus isolated in harbor seals poses a threat to humans memphis, tennessee, september 4, 2014 a study led by st jude children's research hospital scientists found the avian influenza a h3n8 virus that killed harbor seals along the new england coast can spread through respiratory droplets and poses a threat to humans. The threat posed by avian influenza goes beyond the food supply to becoming a lethal virus that is easily spread among people, a global pandemic such a scenario portends grave risk to the economies of nations and to the health of people. The recent spread of highly pathogenicavian influenza from asia to the west has provoked great concern in the eu and worldwidethis disease can have devastating consequences for the health of birds (wild and domestic) and can sometimes pose a threat to human health too. Since pandemic influenza virus has its origins in avian influenza viruses , hpai h5n1 virus has to be considered a potentially serious pandemic threat new influenza virus pandemics in the 21st century are a certainty, but whether h5n1 will be the next pandemic virus is far from certain.
It is only a matter of time before an avian flu virus—most likely h5n1—acquires the ability to be transmitted from human to human, sparking the outbreak of human pandemic influenza so declared dr lee jong-wook, director-general of the world health organization last november [1. H5n1 strain of avian fluthe virus appears to pandemic avian flu alert issue 1 - an overview we do know,as for any threat,that we must plan accordingly. The emerging h7n9 avian influenza virus responsible for at least 37 deaths in china has qualities that could potentially spark a global outbreak of flu, according to a new study an international. Furthermore, laboratory experiments using recombinant influenza viruses containing genes from the 1918 virus suggest that the 1918 and 1918-like viruses would be as sensitive to the food and drug administration-approved anti-influenza drugs rimantadine and oseltamivir as other virus strains (tumpey et al, 2002. The looming threat of avian flu last year's outbreak showed just how difficult it is to protect america's agricultural system from devastating diseases.
Infection with avian influenza a(h7) viruses has commenced, in addition to the ongoing poultry vaccination program against avian influenza a(h5) viruses 7 figure 1: epidemiological curve of avian influenza a(h7n9) cases in humans by week of onset. The first human case due to avian influenza a(h7n4) was notified in china underlining the threat that newly emerging avian influenza viruses pose for transmission to humans close monitoring is required of the situation in africa and the middle east with regards to hpai a(h5n1) and a(h5n8. Avian influenza a viruses (aivs) pose a threat to global health because of their sporadic zoonotic transmission and potential to cause pandemics genomic surveillance of aivs has become a powerful, cost-effective approach for studying virus transmission, evolution, and dissemination, and has the.
While reports of human infections with a(h5n1) virus have declined since 2013, notifications of human infections with a(h7n9) and other avian influenza viruses have increased, highlighting the continued threat posed by these a(hxny) viruses. Influenza a, or avian flu, has dominated the news in recent years for its potential threat as the next great pandemic to infect humans any infectious disease that can be transferred via vertebrate animal to humans is referred to as zoonosis (staff, who . Avian influenza refers to disease caused by infection with avian (bird) influenza (flu) type a viruses avian influenza a viruses can infect the respiratory and gastrointestinal tract of birds and have been isolated from more than 100 different species of wild birds around the world.