whyswineflu.com

Swine influenza – symbolic name of human and animal disease caused by strains of influenza virus. Name spread widely in the media in early 2009. The strains associated with outbreaks of the so-called. “Swine flu” This virus was detected among serotype C and serotype A subtypes (A/H1N1, A/H1N2, A/H3N1, A/H3N2 and A/H2N3). These strains are known collectively as “swine flu”. Swine influenza spread among domestic swine in the United States, Mexico, Canada, South America, Europe, Kenya, mainland China, Taiwan, Japan and other Asian countries. In this case the virus can circulate among people, birds and other species, this process is accompanied by its mutations.

Epidemiology

Transmission from animal to man not widespread and properly cooked (toasted) pork can be a source of infection. Being transferred from animals to humans, the virus does not always cause disease and are often detected only by the presence of antibodies in human blood. Cases of transmission from animals to human’s causes a disease called zoonotic swine influenza. People working with pigs are at risk of contracting the disease, nevertheless, since the mid-twenties of XX century (when he first made possible the identification of subtypes of influenza virus) was recorded only about 50 such cases. Some of the strains causing disease in humans, acquired the ability to spread from person to person. Swine flu in humans causes symptoms typical of influenza and SARS. Swine influenza is transmitted both through direct contact with infected organisms, as well as by airborne droplets (see the mechanism of transmission of infection).

Etiology

The symptoms of swine flu

The outbreak of a new strain of influenza virus in 2009, gained fame as a “swine flu” was caused by a virus subtype H1N1, with the most genetic similarity to swine influenza. The origin of this strain is not known. Nevertheless, the World Organization for Animal Health (World Organization for Animal Health) said that the epidemic spread of the virus of the same strain was unable to establish among pigs. Viruses of this strain transmitted from person to person [5] and cause disease with symptoms typical of influenza.

Pigs can be infected with human influenza viruses, and this is what could happen during a pandemic like the Spanish flu and the outbreak of 2009.

In general, the mechanism by which this virus is similar to that in the defeat of other strains of influenza virus. Atrium is the epithelium of the mucous membranes of human airway, where there is its replication and reproduction. There is a superficial lesion of cells of the trachea and bronchi, characterized by a process of degeneration, necrosis and rejection of infected cells.