Vietnam: The avian influenza virus variants dangerous: Press immediately after this outbreak

29/09/2011
* New virus has emerged a year

This is the only way for Vietnam to deal with avian influenza virus variants dangerous, not in the context of a specific vaccine to control.

Talking NNVN yesterday 5 / 9, TS.Van Register - Head of Epidemiology (DAH) states, the type Vigilance, timely detection and extinguishing immediately outbreak CGC is the most important measures now avian flu vaccine shot before this popular in Vietnam (H5N1 vaccines-Re5) effective virus protection for new branch is very low, almost no effect. Therefore, the Food and Agriculture Organization of the United Nations (FAO) has also obtained information from the U.S. to warn, especially in the U.S. conditions is not currently available vaccines to control this new branch virus, if the outbreak occurs, the would be very dangerous. However, TS.Ky that branching clade 2.3.2 virus is not emerging in Vietnam but was DAH closely monitored from May 9 / 2010. Clade 2.3.2 ominous is rapidly changing and developing into two tributaries are major differences in antigen: a sub division called 2.3.2-A widely circulated in almost every province, and branch called sub-2 2.3.2-B (FAO called H5N1 - 2.3.2.1) do not have effective vaccines against it are concerned FAO warned. Laboratory results of the Department of Animal Health Branch related to clade 2.3.2 viruses have shown, after the virulent intensity: 100% of chickens died within 3 days and 20% ducks died within 7 days. So can see, this new virus is toxic branches with less toxic to birds and ducks (old branch can kill 60 to 70% duck). This new branch virus currently circulating across much of North, Central Coast and Highlands alternative to the old 2.3.4 branch virus. Most recently, the Department of Animal Health has detected an outbreak of avian influenza virus clade 2.3.2 appeared in Quang Tri, Nghe An and Phu Tho. Quang Tri specifically detects bird flu in the district of Hai Lang and Gio Linh districts with more than 2,200 sick birds. In Nghe An, epidemic occurred in Nghi Loc district with a total of 1494 birds is infected children. In Phu Tho bird flu have occurred in Ha Hoa district with 1,500 children infected poultry. However, due to veterinary surveillance for early detection, focused spray disinfection in all households in the service, and also deployed more drastic measures to control the spread of disease and promotion People do not report sales or slaughtering and eating infected poultry should have controlled the outbreak, the spread. According to the FAO warned, the key issue when dealing with bird flu in Vietnam is the lack of hygiene and biosecurity on farms, from the buyers in the market and poultry, as well as in slaughterhouses. Therefore, Vietnam needs to promote improved processing and trade of poultry. Regarding bird flu vaccine, TS.Ky said, Vietnam has embarked on the study vaccine specific for the virus clade 2.3.2 branch from the past several months, but still not successful. Before this situation, the Department of Animal Health has contacted the two "great powers" for vaccine production are China and Mexico, but the results are not better. Also yesterday, Nguyen Xuan Binh - Director of the Regional Veterinary VI said, in the south has not appeared in any avian influenza virus clade 2.3.2 branch. "If the outbreak, we will address the genetic code to determine the right branch of any virus, can mutate or not to take remedial measures immediately." However, Mr. Binh has said from now until the end of HPAI (virus including new branch) will move and appear in the south by two reasons: U.S. is not bird flu vaccination phase 1 (early 2011) and cold weather combined with livestock density thicker (for holidays, New Year) should translate very easily happen. TS.Van registered, said the new DAH government would import another 60 million doses of H5N1 vaccine-Re5 still work with older avian virus clade 1 (no new virus branch of clade 2.3.2) and are concentrated in the southern province to vaccination in the future. Particularly with the new branch without virus-specific vaccines, TS.Ky warning: time in Cambodia has had eight cases of bird flu have died and in a short time. Thus, U.S. must also be careful. Veterinary Department has warned that bird flu virus and the changes can always occur, especially in the context of vaccine is not effective with the new virus branch. Source www.nongnghiep.vn