Bird flu of H5N1
New cases. As reported by ITAR-TASS, in Indonesia in February the fourth is confirmed since the beginning of 2012 a case of death of the person from bird flu. The 12-year-old inhabitant of the Indonesian resort island of Bali became the new victim of the dangerous virus H5N1. Week earlier in Indonesia from this illness the 19-year-old girl was lost, and in January physicians confirmed two more death as a result of H5N1 infection. Thus, taking into account the last case, the total of victims from bird flu in Indonesia, since December, 2003 when the outbreak of an illness was fixed for the first time in South East Asia, reached 154 people. Along with Indonesia, with the increased danger of distribution of the virus H5N1 experts of World Health Organization carry to number of the countries also Vietnam, Cambodia and some more Southeast Asian countries. By the way, in Vietnam since the beginning of year two lethal cases among people as a result of infection with the virus H5N1 are fixed already, one patient with bird flu died in Cambodia.
Bird flu is how dangerous? Meanwhile, the American microbiologists found out that the virus of bird flu of H5N1 infects people more often than the statistics of World Health Organization shows, but to a deadly outcome leads considerably less than tells WHO. About it reports RIA Novosti news agency referring to article published in the Science magazine. The conclusion that WHO overestimates danger of bird flu, became result of large-scale researches during which at 1-2 % from 7 300 volunteers passable medical examination, in blood antibodies to H5N1 were stably found. In other words, these people have bird flu and did not die. Moreover, at all did not know that faced so dangerous illness.
Why flu bird’s? The guest of our portal, the chief specialist on infectious diseases of Department of Health care of Moscow, the doctor of medical sciences Nikolay Aleksandrovich Malyshev answers: «Flu many animals, including mammals have. Whales have flu, various birds too. Respectively, if on the structure and a structure that virus of flu which is found in the person, is close to one of types of a virus which is found in animals, he receives the corresponding name. Though it is colloquial designations» (the full version of interview>>).
Bird flu is a sharp infectious virus disease of birds (especially wild natatorial, such as ducks and geese), being characterized defeat of digestive organs and breath, and also a high lethality. The main part of such viruses is not transferred to people, but H5N1 broke an interspecific barrier and can be dangerous to human population. However the majority of cases of defeat of people of H5N1 is connected with direct or indirect contacts to the infected live or dead house birds. Actual data that this illness can be transferred through the foodstuff prepared properly, are not available. The fact of transfer of an illness from the person to the person is not established also. But sick birds represent appreciable threat in connection with the seasonal flights on huge distances.
Historical background. For the first time the avian flu was described by the Italian veterinarian Eduardo Perronchito (Edoardo Perroncito) in 1878 under the name chicken typhus. Perronchito reported about the outbreak of the vysokokontagiozny disease affecting hens on farms in vicinities of Turin. Further an illness christened the European plague of birds, but passed even the whole century before scientists managed to define that the virus "plagues" it, actually, a flu virus. The virus H5N1 subtype – highly the PG pathogenic virus – infected for the first time the person in 1997 during the outbreak of an illness among house birds in Hong Kong, SAR of China. 18 people fell ill, 6 from them died. After new emergence in 2003 and 2004 this virus extended from Asia to Europe and Africa. By August, 2005 112 cases of the person of bird flu in Vietnam, Thailand, Cambodia and Indonesia were registered already, 64 deadly outcomes are fixed.
Important! A major factor of risk of infection of the person a strain of H5N1 is direct or indirect contact to the infected live or dead house birds, and also the polluted environment.