When most people hear the word "flu", they tend to think that there is only one strain and that it affects everyone in the world. same way. However; There are several strains of influenza, one of them being HN51 influenza. HN51 influenza, also known as a specific strain of avian influenza discovered in 1996. The H stands for Hemagglutinin and the N stands for Neuraminidase. There are eighteen different types of hemagglutinin subgroups and eleven different types of neuraminidase subgroups. The first strain of this type of flu to appear was identified in geese in southern China. These geese, carriers of this disease, usually do not get sick themselves, which is why they are called “reservoirs”. A reservoir carries a virus. The virus does not affect them, they just carry it from one place to the site of infection. Avian flu does not generally infect humans; however, some strains such as A(H5N1) and A(H7N9) have caused severe cases in some people. Sometimes a person infected with bird flu can pass it on to someone else. There is a wide range of unresolved questions regarding this disease since its emergence. Avian influenza is divided into groups based on their ability to cause disease in poultry; high pathogenicity and low pathogenicity. Pathogenicity means how serious the virus is and how easily it can affect an animal. High pathogenicity results in high mortality rates and low pathogenicity results in low mortality rates. HN51 has had a big impact on growers and some backyard growers. The flu caused significant market shocks, largely driven by unjustified public fears about the safety of poultry products. The media helped fuel these concerns and led to falling sales and prices in the market ... middle of paper ... human body. It is very rare for the H5N1 influenza strain to spread in the human population, but it is not unheard of. It is difficult to detect this virus in poultry, just watch for symptoms. If your poultry develops symptoms of H5N1 flu, it is best to begin treatment of the entire flock of birds. Detecting the virus in an animal after it has already been treated is also difficult to do. To avoid contracting the disease, it is best to ensure that meat is fully cooked and to avoid contaminating cutting boards and knives. The United States has banned the importation of poultry into certain countries. This limits the spread of diseases from one country to another. The symptoms of bird flu in poultry are sudden death during casting for no apparent reason. Another symptom is unlikely neck posture and abnormal egg laying in chickens..