What are different types of viruses bird flu?

There are three main types of viruses bird flu and not all of them represent a threat to people. Influenza viruses and are types that all infect and are carried by birds, and there are several subtypes in each group; All subtypes occur in birds, but only some may be exceeded to humans. The most commonly found in humans type Hemaglutinin 9 (H9). Hemagglutinin 5 (H5) has subtypes that may be deadly for humans, but are less common, while human infection from Hemaglutinin 7 (H7) usually occurs only when the individual comes into contact with the sick bird. The first number defines the number of hemaglutinin proteins contained in the virus, while the second number defines the amount of neuraminidase proteins (N). Most types of bird flu viruses have a number of different mutations that allow a number of different n numbers.

One of the most effective viruses of bird flu inEré has crossed people, is the H5N1 tribe. This type of bird flu has had a relatively high mortality rate in humans since he first infected individuals in Hong Kong in 1997. The virus causes typical symptoms of influenza such as fever, body pain and overall feeling of fatigue and weakness. In some cases, it is known to culminate in an organ and respiratory failure. The development of this virus in humans has shown how the flu can mutate and spread through completely different types of creatures.

The influenza viruses and are thus named because each type and subtype are found in birds. Some subtypes may be deadly for birds, especially domestic. Others exist as a mild disease and represent only a threat to another species once it mutates. All H5 subtypes have been documented in humans, while subtypes H7 and H9 rarely found in humans and are generally mild.

There are two main results of the outbreak of bird flu in birds. Some viruses only result in an unhealthy appearance of feathers and to change the number and quality of eggs, alE can be deadly when they mutate to spread to people. The second type, known as highly pathogenic, is significantly more fatal for birds. Once the species is infected with the subtype of one of the viruses of bird flu, the disease usually spreads rapidly.