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SWINE FLU Swine influenza virus (SIV) is caused by Orthomyxoviruses that are endemic to pig populations. SIV strains isolated to date have been classified either as Influenza virus C or one of the various subtypes of the genus Influenza virus A. Swine flu, unlike bird flu, is able to pass from human to human contact. The 2009 swine flu outbreak is the spread of a new strain of H1N1 influenza virus that was first detected by public health agencies in March 2009. Local outbreaks of influenza-like illness were detected in three areas of Mexico, but the presence of this new strain was not discovered for a month. Following this discovery in the parts of United States bordering Mexico, its presence was swiftly confirmed in the local outbreaks in Mexico, and in isolated cases elsewhere. By April 27, the new strain was confirmed also in Canada, Spain, and the United Kingdom and suspected in many other nations, with over 1,800 candidate cases. The new strain is an apparent reassortment of several strains of influenza A virus subtype H1N1, including a strain endemic in humans and two strains endemic in pigs, as well as an avian influenza. Reassortment is common in influenza viruses, due to the structure of their genome. This particular reassortment is consistent with a transmission of swine influenza from pig to human combined with the mixing of two viral infections in the same person. In April both the World Health Organization (WHO) and the United States Centers for Disease Control and Prevention (CDC) expressed serious concerns about this novel strain, because it apparently transmits from human to human, has had a relatively high mortality rate in Mexico, and because it has the potential to become a flu pandemic. On April 25, 2009, the WHO determined the situation to be a formal “public health emergency of international concern”, with knowledge lacking in regard to “the clinical features, epidemiology, and virology of reported cases and the appropriate responses”. Government health agencies around the world also expressed concerns over the outbreak and are monitoring the situation closely. Recommendations to prevent infection by the virus consist of the standard personal precautions against influenza. This includes frequent washing of hands with soap and water or with alcohol-based hand sanitizers, especially after being out in public. People should avoid touching their mouth, nose or eyes with their hands unless they've washed their hands. If people do cough, they should either cough into a tissue or throw it in the garbage immediately or, if they cough in their hand, they should wash their hands immediately. Many countries confirmed that inbound international passengers will be screened. Typical airport health screening involves asking passengers which countries they have visited and checking whether they feel or look particularly unwell. On April 27, the CDC recommended the use of Tami flu and Relenza for both treatment and prevention of the new strain. Some physicians in the US are recommending the use of masks when in public. The purpose of a face mask is to effectively cover a person’s mouth and nose so that if a person is around someone who is infected, there is a decreased likelihood of transmission. Questions and answers about swine flu Mexico is contending with an outbreak of swine flu, suspected in the deaths of dozens of people and sickening perhaps 1,000. In the United States, at least eight cases have been confirmed with the infection, all of them in California and Texas; only one person was hospitalized. Here are some questions and answers about the illness: Q. What is swine flu? A. Swine flu is a respiratory illness in pigs caused by a virus. The swine flu virus routinely causes outbreaks in pigs but doesn’t usually kill many of them. Q. Can people get swine flu? A. Swine flu viruses don’t usually infect humans. There have been occasional cases, usually among people who’ve had direct contact with infected pigs, such as farm workers. “We’ve seen swine influenza in humans over the past several years, and in most cases, it’s come from direct pig contact. This seems to be different,” said Dr. Arnold Monto, a flu expert with the University of Michigan. Q. Can it spread among humans? A. There have been cases of the virus spreading from human to human, probably in the same way as seasonal flu, through coughing and sneezing by infected people. Q. What are the symptoms of swine flu? A. The symptoms are similar to those of regular flu — fever, cough, fatigue, lack of appetite. Q. Is the same swine flu virus making people sick in Mexico and the U.S.? A. The Centers for Disease Control and Prevention said the Mexican virus samples match the U.S. virus. The virus is a mix of human virus, bird virus from North America and pig viruses from North America, Europe and Asia. Q. Are there drugs to treat swine flu in humans? A. There are four different drugs approved in the U.S. to treat the flu, but the new virus has shown resistance to the two oldest. If you suspects any symptoms of Swine flu, contact your physician. Q. Does a regular flu shot protect against swine flu? A. The seasonal flu vaccine used in the U.S. this year won’t likely provide protection against the latest swine flu virus. There is a swine flu vaccine for pigs but not for humans. Q. Should residents of California or Texas do anything special? A. The CDC recommends routine precautions to prevent the spread of infectious diseases: wash your hands often, cover your nose and mouth when you cough or sneeze, avoid close contact with sick people. If you are sick, stay at home and limit contact with others. Q. What about traveling to Mexico? A. The CDC has not warned Americans against traveling to Mexico but advises that they be aware of the illnesses there and takes precautions to protect against infections, like washing their hands. Crated By: K.M. Mahbub Sharif (Ratul) Contact: +88-0191-2191797 E-mail: