© by Wekrue WebDesign 2018

BIRD FLU

Note: For more detailed informations about the H5N1 (Bird Flu) read here:  http://www.who.int/mediacentre/factsheets/avian_ influenza/en/

Can Bird Flu infect humans ?

.... and what are the symptoms of a Bird Flu infection in humans? In many cases it is reported that the virus H5N1 can infect humans. From the outbreak 2003 through end of 2011 worldwide 574 people were reported to have been infected with the H5N1 virus. 60 % of them died. Allmost of this bird flu cases were reported in China, Egypt, Indonesia, Thailand and also Vietnam. According to information from the WHO in May 2012 are 221 reported cases of human infections in the South-East Asia region since the first global case was reported in 2003. More than a third of all such cases globally have been reported from the South-East Asia region. The primary risk factor for a human infection appears to be direct or indirect exposure to infected live or dead animals or contaminated environments. The first known cases in humans were reported in 1997 in Hong Kong. After an outbreak in poultry the bird flu led to severe illness in 18 people. A third of whom died. The  typical symptoms are hight fever (> 38º) and influenza-like symptoms like sore throat, cough, headache and muscle aches. Other symptoms are diarrhoea, vomiting, abdominal pain and chest pain. Bleeding from the nose and gums have also been reported.  

What causes Bird Flu?

The bird flu is caused by an influenza virus. We divide the influenza viruses in three distinct types, each with its own characteristics, called Type A, B, C. The Type A influenza viruses, to which the bird flu is classified, may be further divided into subtypes and this subtypes may combine in a range of other subtypes, whose impact may be confined to a single species. All the suptypes are distinguished on the basis of variations in two proteins found on the surface of the viral particle: H = Hemagglutinin N = Neuraminidase  Birds are susceptible to different influenza A subtypes, of which by far the most dangerous is the strain H5N1. This avian influenza occurs frequently in poultry and other bird species, including migratory waterbirds. The bird flu with the subtyp H5N1 occured mainly in poultry. Hundreds of millions of birds in Thailand, Cambodia, Vietnam, Indonesia, China, Japan, Kazakhstan, Laos, Malaysia, Romania, Russia, South Korea and Turkey died from bird flu direct or were culled to control the epedemics. All the type A influenza viruses change their genetic makeup very quickly and easy.

What is Bird Flu?

.... and what are the symptoms of

a Bird Flu infection in birds?

Avian Influenza, commonly called “Bird Flu” is a viral respiratory disease and is caused by a kind of influenza virus. Bird flu affects birds but also mammals, including pigs an humans. Wild Birds can carry the viruses, but usually do not get sick from them. Many kind of domesticated birds, such as chickens and ducks become infected, often fatally. In poultry, bird flu comes in two different types. One is mild, widespread and almost imperceptible. The symptoms of this form of bird flu in birds are ruffled feathers, reduced egg production, also minor respiratory problems. It is possible that the outbreak may be so mild as to go entirely undetected. The other type is very deadly and difficult to overlook, because it is highly contagious and spreads rapidly to surrounding birds. This bird flu affects the birds respiratory tract and attacks multiple organs and tissues, leading to internal haemorrhaging. Almost of infected birds may die within 48 hours of contracting the disease. The danger of this bird flu is, that it can easily be spread from one location to another. This happens because the infected birds shed the virus that causes the disease in their droppings, feathers, saliva and nasal secretions, which then contaminate the birds’ cages, food also the clothing of people around the birds.