How does bird flu spread?

Question 1: What is avian influenza? How does it spread? What is avian influenza?

Avian influenza is an acute infectious disease caused by avian influenza virus, which can also infect humans. The main symptoms after infection are high fever, cough, runny nose and myalgia. Most of them are accompanied by severe pneumonia, and severe cardiac and renal failure leads to death, with a high mortality rate. The disease can spread through digestive tract, respiratory tract, skin injury, conjunctiva and other ways, and traffic between people and vehicles is an important factor to spread the disease.

Can eating eggs infect bird flu?

According to the Office of the National Command for the Prevention and Control of Highly Pathogenic Avian Influenza, highly pathogenic avian influenza virus can be transmitted through eggs.

Jia Youling, chief animal husbandry officer of the Ministry of Agriculture, said that it is not dangerous to eat eggs in places where there is no epidemic. Eggs in epidemic areas may be infected with the virus, so we hope that eggs will be cooked or fried before eating.

Is it contagious to eat chickens, ducks and geese?

After the poultry meat is cooked, the possibility of virus transmission is small. But if the sick birds are not thoroughly cooked, the virus is likely to enter the human body. If the virus enters the human body and survives, it will be introduced into various tissues of the human body through the digestive tract and the working principle of the virus in the human body. These mechanisms are not clear. In this case, only poultry from the epidemic area were blocked.

At present, China's quarantine department has taken emergency preventive measures, and no cases have occurred in China. Poultry in the regular market can basically be safely eaten. The key is to cook it thoroughly. If you eat poultry that have not been quarantined or come from epidemic areas, the risk of infection is not ruled out.

Is it contagious to wear down jacket and duck down?

The person in charge of Wuhan Veterinary Health Supervision Institute said that wearing down jackets, duvets and related products will definitely not infect bird flu. Because down products are usually treated by disinfection, high temperature and other physical and chemical links, the possibility of virus survival is very small and it is impossible to cause harm to people's health.

Eggs are boiled for ten minutes and are safe to eat.

Experts in public health and epidemiology said that after the eggs were boiled for 5 ~ 10 minutes, the avian influenza virus could be completely inactivated and the eggs were safe to eat.

Dr. Lu Hongzhou from the Infection Department of Huashan Hospital pointed out that the avian influenza virus has been proved to be able to spread vertically. However, after high temperature treatment, the avian influenza virus can be completely inactivated.

Professor Yu from the School of Public Health of Fudan University said that eggs can be safely eaten after being heated and boiled for 5 ~ 10 minutes.

Professor Yu suggested that from the perspective of safety precautions, boiled eggs and raw eggs should be avoided as much as possible, and scrambled eggs and poached eggs should be cooked. When eating eggs, pay attention to the hygiene outside the eggshell. The eggshell may be polluted, so when processing eggs, the eggshell should be cleaned first; When beating eggs, don't let the eggshells fall in; Wash your hands thoroughly after processing eggs.

What are the common symptoms of avian influenza?

The symptoms of avian influenza vary with the species, age, sex, degree of concurrent infection, virus virulence and environmental factors of infected birds, mainly manifested as abnormalities in respiratory tract, digestive tract, reproductive system or nervous system.

Common symptoms are: listlessness, reduced feed consumption and emaciation of sick chickens; The nesting ability of hens is enhanced and the egg production is reduced; Mild to severe respiratory symptoms, including coughing, sneezing and profuse tears; Head and face edema, nervous disorder, diarrhea.

Any of these symptoms may appear alone or in different combinations. Sometimes the disease breaks out quickly and the chicken is found dead without obvious symptoms.

In addition, the incidence and mortality of avian influenza vary greatly, depending on the variety and strain of poultry, age, environment and concurrent infection. Usually, the incidence is high and the mortality is low. In the case of highly pathogenic virus infection, the morbidity and mortality can reach 100%.

The incubation period of avian influenza varies from several hours to several days, and its length is related to the pathogenicity of the virus, the dose of the infected virus, the route of infection and the species of infected birds.

Main transmission routes of avian influenza

1. WHO points out that feces are the main channel for the spread of avian influenza.

2. The World Health Organization (WHO) said on June 16 that the bird flu that has killed at least four people in Vietnam is mainly spread through poultry droppings, not cooked meat.

3. According to Agence France-Presse, WHO said that H5N 1 avian influenza virus in the feces of sick chickens will spread in the air and be carried away by the wind. Put chickens in layers of narrow cages, and it is easy to spread bird flu through their feces. Chicken farmers are also at risk of inhaling the virus. However, WHO spokesman Fadel? Chaeb said that eating cooked sick chickens is almost impossible to get sick. He quoted WHO experts as saying: "The virus was boiled to death." ......& gt& gt

Question 2: How does bird flu spread to humans? How does bird flu spread to humans? Song Jie, Secretary-General of the China Ornithological Society, said: Avian influenza is a disease that spreads directly between poultry and mammals, and can also spread among birds. Because poultry is the object of people's consumption, people may be infected after eating this kind of poultry with virus. If it mutates in the human body, the consequences are unimaginable. But people should not panic, because bird flu has existed since ancient times. Under normal circumstances, people can carry the bird flu virus, and only when the human body's resistance drops will this virus do harm to the human body.

Regarding how to prevent the current epidemic situation and the most dangerous subtype H5N 1 avian influenza, Dr. Chen Hualan, director of the Key Open Laboratory of Animal Influenza of the Ministry of Agriculture, said that it is very effective to inject subtype-specific inactivated avian influenza vaccine for poultry. In the aspect of human prevention, the International Cooperation Laboratory of the World Health Organization conducted a lot of vaccine reserve research after the avian influenza incident in Hong Kong from 65438 to 0997, but it has not been commercialized and there is no reserve in China at present. People infected with avian influenza virus can be cured if they are diagnosed and treated in time. Try to avoid contact with pathogens in daily life, and keep warm at the same time, because once you catch a cold and your resistance drops, the virus will take advantage of it.

Song Jie believes that human beings need to strengthen prevention from three aspects: First, in the circulation link, strengthen law enforcement and resolutely crack down on illegal capture and trafficking of wild animals. Then there is the marketing department, which does not illegally operate wild animals and sets up a protection network in the field of commercial circulation. Finally, human beings should raise awareness of environmental protection, avoid eating wild animals, pay attention to personal hygiene, and develop good personal hygiene habits and eating habits.

Question 3: How did bird flu come from or spread? 5 points bird flu, full name bird popular sexy.

Hair is an animal infectious disease caused by virus.

It usually only infects birds and rarely infects pigs.

Avian influenza virus is highly targeted at specific species, but in

In rare cases, it will cross species barriers and infect people.

Since the discovery of human infection in 1997 Hong Kong.

After the bird flu, the disease caused worldwide health problems.

The organization attaches great importance to it. Since then, this disease

Sporadic outbreaks in Asia began in February 2003.

At first, bird flu spread in many countries in East Asia, mainly in Vietnam.

South Korea, South Korea and Thailand broke out seriously, causing Vietnam.

Many patients were killed in the south. At present, it is far away in Eastern Europe.

There are also cases in China. 2065438+March 2002 Taiwan Province Province was the first.

H5N2 highly pathogenic avian influenza occurred, resulting in

Attach importance to. 201September 18 Guangdong Provincial Department of Agriculture

It is reported that a highly pathogenic avian influenza has occurred in Zhanjiang.

Question 4: How can you get bird flu? The patient developed acute onset and early symptoms similar to common flu. Fever is the main cause, and the body temperature is above 39℃, with a heat course of 1-7 days, usually 3-4 days, and may be accompanied by runny nose, stuffy nose, cough, sore throat, headache, muscle aches and general malaise. Some patients may have digestive tract symptoms, such as nausea, abdominal pain, diarrhea and watery stools. Severe patients develop rapidly, and there are many complications such as pneumonia, acute respiratory distress syndrome, pulmonary hemorrhage, pleural effusion, pancytopenia, renal failure, sepsis, shock, Raynaud's syndrome and so on. The main route of transmission of avian influenza is feces. H5N 1 strain of avian influenza in the feces of sick chickens will spread in the air and be carried away by the wind. Chicken farmers are also at risk of inhaling virus-will the virus spread from person to person? Once the avian influenza virus is recombined with the human virus, it may theoretically spread from person to person. By then, this virus will become a human virus, just like the flu virus. -Four Suggestions on Avoiding Avian Influenza Biologists have put forward four suggestions on how to avoid contracting avian influenza. Suggestion 1: Don't travel to epidemic areas. Recommendation 2: Don't touch live birds. Recommendation 3: Pay attention to disease prevention. Recommendation 4: Pay attention to high-temperature antivirus.

Question 5: How does the flu spread? Influenza is an acute respiratory infectious disease caused by influenza virus. Influenza virus is generally spread through droplets in the air, contact between people or contact with contaminated items, and it is an infectious disease. It is caused by RNA virus of myxoviridae. Influenza is prevalent in autumn and winter with mild climate every year, and serious complications related to the virus lead to a high mortality rate of severe patients. Influenza and common cold are both caused by viruses, and their prophase symptoms are very similar, and common cold is also called cold or common cold, so many people often confuse them. According to the epidemic degree, influenza can be divided into worldwide pandemic, regional epidemic, local outbreak and sporadic cases. In phylogenetic taxonomy, RNA viruses include antisense ssRNA viruses (including other single-stranded retroviruses, orthomyxoviridae viruses, etc.). ). The species and serum of orthomyxoviridae are shown in the following table. Orthomyxoviridae (type species) was infected with influenza A virus H 1N 1, H 1N2, H2N2, H3N 1, H3N8, H5N 1, H5N2, H5N3. H5n9, h7n71,h7n2, h7n3, h7n4, h7n7, h9n2, h 10n7 mammals (including humans) and birds belong to influenza B virus, while influenza C virus of humans and seals belongs to influenza C virus. Influenza in humans and pigs peaks in winter, because there are winters in both northern and southern hemispheres, so there are actually two different kinds of influenza every year. This is why the World Health Organization (assisted by the National Influenza Center) proposed to prepare two different vaccines every year; One for the northern hemisphere and one for the southern hemisphere. When influenza is caused by multiple influenza viruses, some influenza viruses may be extinct in any given year, which makes the environment create unique influenza viruses, and these influenza viruses may also cause epidemics.