H1N1 – Swine Flu Virus

H1N1 – Swine Flu Virus
Swine flu refers to a respiratory infection caused by influenza A viruses that ordinarily cause illness in pigs. Humans can catch swine flu from infected pigs, but pig-to-human transmission is unusual. Human-to-human transmission of true swine flu is also possible but infrequent.
The recent outbreak of what is being called swine flu involves a new H1N1 type A influenza strain that’s a genetic combination of swine, avian and human influenza viruses. It’s capable of spreading from human to human.

In June 2009, based on its wide spread to many nations, the World Health Organization declared the swine flu outbreak a global pandemic.
This new swine flu strain is being called by a number of names, including: swine-origin influenza A, swine influenza A (H1N1), influenza A/California/H1N1, swine origin influenza virus, North American flu and influenza A (H1N1).
The best approach you can take is to try to avoid infection. If you do develop symptoms of swine flu, seek prompt medical attention so that you have the best chance of antiviral drugs providing you with successful treatment.
Symptoms
The symptoms of swine flu in humans are similar to those of infection with other flu strains.
Fever
Cough
Sore throat
Body aches
Headache
Chills
Fatigue
Diarrhea
Vomiting
Symptoms develop three to five days after you’re exposed to the virus and continue for about another week. You can pass the virus to other people for about eight days, starting one day before you get sick and continuing until you’ve recovered.
When to see a doctor

See your doctor immediately if you develop flu symptoms, such as fever, cough and body aches, and you have recently traveled to an area where H1N1 swine flu has been reported. Be sure to let your doctor know when and where you traveled.
Also see your doctor if you develop respiratory symptoms after you’ve been in close contact with someone who may have been exposed to H1N1 swine flu.
Doctors have rapid tests to identify the flu virus, but there is no rapid test to differentiate swine influenza A H1N1 from other influenza A subtypes.

Causes
Influenza viruses infect the cells lining your nose, throat and lungs. You can be exposed to swine flu virus if you have contact with infected pigs. The virus enters your body when you inhale contaminated droplets or transfer live virus from a contaminated surface to your eyes, nose or mouth on your hand.
Risk factors
Swine farmers and veterinarians have the highest swine flu risk because of their exposure to pigs.
If you’ve traveled to an affected area, you may have been exposed to human swine influenza A H1N1, particularly if you spent time in large crowds.
Complications
Influenza complications include:
Worsening of chronic conditions, such as heart disease, diabetes and asthma
Pneumonia
Respiratory failure
Severe complications of human swine flu H1N1 seem to develop and progress rapidly.
Treatments and drugs
Most cases of flu, including human swine flu, need no treatment other than symptom relief. If you have a chronic respiratory disease, your doctor may prescribe additional medication to decrease inflammation, open your airways and help clear lung secretions.
Antiviral drugs can reduce the severity of symptoms. There are two classes of antiviral medication used to reduce symptoms and duration of the flu — adamantane antivirals and neuraminidase inhibitors — but flu viruses can develop resistance to them.
Human swine flu H1N1 is sensitive to oseltamivir (Tamiflu) and zanamivir (Relenza), both of which are neuraminidase inhibitors. It’s important to start treatment as soon as possible after you become ill. These antiviral medications are most effective if treatment begins within 48 hours of developing symptoms.
Lifestyle and home remedies
If you come down with any type of flu, these measures may help ease your symptoms:
Drink plenty of liquids. Choose water, juice and warm soups to prevent dehydration. Drink enough so that your urine is clear or pale yellow.
Rest. Get more sleep to help your immune system fight infection.
Consider pain relievers. Use an over-the-counter pain reliever such as acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others) cautiously, as needed.
Remember, pain relievers may make you more comfortable, but they won’t make your symptoms go away any faster and may have side effects. Ibuprofen may cause stomach pain, bleeding and ulcers. If taken for a long period or in higher than recommended doses, acetaminophen can be toxic to your liver.
Talk to your doctor before giving acetaminophen to children. And don’t give aspirin to children or teens because of the risk of Reye’s syndrome, a rare but potentially fatal disease.

Prevention
These measures may help prevent flu:
Stay home if you’re sick. If you do have swine flu, you can give it to others starting about 24 hours before you develop symptoms and ending about seven days later.
Wash your hands thoroughly and frequently. Use soap and water, or if they’re unavailable, use an alcohol-based hand sanitizer. Flu viruses can survive for two hours or longer on surfaces, such as doorknobs and countertops.
Avoid contact. Stay away from crowds if possible.
Reduce exposure within your household. If a member of your household has swine flu, designate one other household member to be responsible for the ill person’s close personal care.