U.S. scientists have recently confirmed that the U.S. pigs are infected with the virus A stream. Was initially mistaken called "swine flu" epidemic of Influenza A H1N1 influenza in the human body after infection, but also infected pigs, people - there may be a cross between pigs infected with a high degree of concern for scientists, because cross-cross infection between species may make further expansion of the epidemic, while the virus hybridization, the possibility of mutation has also been a high priority.
Are most afraid of viruses hybridization
This summer, Minnesota Merchandise Show in the United States during the seven participating pigs infected with the virus A stream. Experts suspect that these pigs infected with influenza A virus, influenza virus may be sick source of visitors. The U.S. "Washington Post" reported on 25 such a scientist's concern: A flow of viruses transmitted directly from person to pigs, and swine influenza virus previously known hybrid, even with the avian flu virus hybrid, and later re-form a new virus, to infect humans. This new virus may have the virus do not have the characteristics of the original, including the infectious stronger, faster propagation speed, greater damage to the lungs. Even worse, the body's immune system ignorant of the new virus.
"Washington Post" said that humanity at this stage of a stream not yet know the origin of the virus. But one thing has been confirmed: This has now been infected with more than 190 countries and regions, the virus was initially a pig's body was found. In order to prevent potential infection cycle to avoid direct contact between man and pig seems to be a safer approach.
But in fact this was not entirely easy. A survey in 2006 showed that 58% of pig farms in the United States or have been subjected to flu viruses.
Renewed focus on swine influenza
Have been found in pigs in vivo, the scientists collected the same time, the human influenza, swine influenza and avian influenza virus gene fragments.
Therefore, the American scientists in the study of human infection with a stream at the same time, it began to bend down for the pig physical, hoping to get more information about the virus.