Author: szl8179

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Post time 2006-7-3 07:01:11 |Display all floors

Hepatitis B ... what I have found

Introduction
Hepatitis B is a serious liver infection caused by the hepatitis B virus (HBV). For some people, the infection becomes chronic, leading to liver failure, liver cancer or cirrhosis — a condition that causes permanent scarring of the liver.

The hepatitis B virus is transmitted through contact with the blood and body fluids of someone who is infected — the same way the human immunodeficiency virus (HIV), the virus that causes AIDS, spreads. Yet hepatitis B is nearly 100 times as infectious as HIV.

You're especially at risk if you are an intravenous (IV) drug user who shares needles or other paraphernalia, have unprotected sexual contact with an infected partner, or were born in or travel to parts of the world where hepatitis B is widespread. In addition, women with HBV can pass the infection to their babies during childbirth.

Most people infected as adults recover fully from hepatitis B, even if their signs and symptoms are severe. Infants and children are much more likely to develop a chronic infection. Although no cure exists for hepatitis B, a vaccine can prevent the disease. If you're already infected, taking certain precautions can help prevent HBV from spreading to others.

Signs and symptoms
Most infants and children with hepatitis B never develop signs and symptoms. The same is true for many adults. Signs and symptoms usually appear four to six weeks after you're infected and can range from mild to severe. They may include some or all of the following:

Loss of appetite
Nausea and vomiting
Weakness and fatigue
Abdominal pain, especially around your liver
Dark urine
Yellowing of your skin and the whites of your eyes (jaundice)
Joint pain
Hepatitis B can damage your liver — and spread to other people — even if you don't have any signs and symptoms. That's why it's important to be tested if you think you've been exposed to hepatitis B or you engage in behavior that puts you at risk.


Causes

Your liver is located on the right side of your abdomen, just beneath your lower ribs. It performs more than 500 functions, including processing most of the nutrients absorbed from your intestines, removing drugs, alcohol and other harmful substances from your bloodstream, and manufacturing bile — the greenish fluid stored in your gallbladder that helps digest fats. Your liver also produces cholesterol, blood-clotting factors and certain other proteins.

Because of the complexity of the liver and its exposure to so many potentially toxic substances, it would seem especially vulnerable to disease. But the liver has an amazing capacity for regeneration — it can heal itself by replacing or repairing injured tissue. In addition, healthy cells take over the function of damaged cells, either indefinitely or until the damage has been repaired. Yet in spite of this, your liver is prone to a number of diseases that can cause serious or irreversible damage, including hepatitis B.

Acute vs. chronic hepatitis B
Hepatitis B infection may be either acute — lasting less than six months — or chronic, lasting six months or longer. If the disease is acute, your immune system is able to clear the virus from your body, and you should recover completely within a few months. When your immune system can't fight off the virus, HBV infection may become lifelong, leading to serious illnesses such as cirrhosis and liver cancer.

Most people who acquire hepatitis B as adults have an acute infection. But the outlook isn't nearly as hopeful for infants and children. Most infants infected with HBV at birth and many children infected between 1 and 5 years of age become chronically infected. Chronic infection may go undetected for decades until a person becomes seriously ill from liver disease.

Hepatitis B is one of six currently identified strains of viral hepatitis — the others are A, C, D, E and G. Each strain is unique, differing from the others in severity and in the way it spreads.

Major ways transmission occurs
In industrialized countries, you're most likely to become infected with HBV in the following ways:

Sexual transmission. You may become infected if you have unprotected vaginal, anal or oral sex with an infected partner whose blood, saliva, semen or vaginal secretions enter your body. You can also become infected from shared sexual devices if they're not washed or covered with a condom. The virus is present in the secretions of someone who's infected and enters your body through small tears that can develop in your rectum or vagina during sexual activity.

Transmission through needle sharing. HBV is easily transmitted through needles and syringes contaminated with infected blood. That's why sharing IV drug paraphernalia puts you at high risk of hepatitis B. Your risk increases if you inject drugs frequently or also engage in high-risk sexual behavior. Although avoiding the use of injected drugs is the most reliable way to prevent infection, you may not choose to do this. If so, one way to reduce your risk is to participate in a needle exchange program in your community. These programs allow you to exchange used needles and syringes for sterile equipment. In addition, consider seeking counseling or treatment for your drug use.

Transmission through accidental needle sticks. Hepatitis B is a concern for health care workers and anyone else who comes in contact with human blood. If you fall into one of these categories, get vaccinated against hepatitis B in addition to following routine precautions when handling needles and other sharp instruments.

Transmission from mother to child. Pregnant women infected with HBV can pass the virus to their babies. If you have hepatitis B, having your baby receive a shot of hepatitis B immune globulin at birth, along with the first in a series of three hepatitis B vaccines, will greatly reduce your baby's risk of getting the virus.

For you to become infected with HBV, infected blood, semen, vaginal secretions or saliva must enter your body. You can't become infected through casual contact — hugging, dancing or shaking hands — with someone who has hepatitis B. You also can't be infected in any of the following ways:

Coming into contact with the sweat or tears of someone with HBV
Sharing a swimming pool, telephone or toilet seat with someone who has the virus
Donating blood

Risk factors

Anyone of any age, race, nationality, sex or sexual orientation can be infected with HBV. But you're at greatest risk if you:

Have unprotected sex with more than one partner. You're at risk whether you're heterosexual, homosexual or bisexual. Unprotected sex means having sex without using a new latex or polyurethane condom every time.

Have unprotected sex with someone who's infected with HBV.

Have a sexually transmitted disease such as gonorrhea or chlamydia.

Share needles during intravenous (IV) drug use.

Share a household with someone who has a chronic HBV infection.

Have a job that exposes you to human blood.

Received a blood transfusion or blood products before 1970 — the date the blood supply began to be tested for HBV. Today, the risk of contracting HBV per unit of donated blood is low.

Receive hemodialysis for end-stage kidney (renal) disease.

Travel to regions with high infection rates of HBV, such as sub-Saharan Africa,

Southeast Asia, the Amazon Basin, the Pacific Islands and the Middle East.

Are an adolescent or young adult residing in a U.S. correctional facility.

Newborns whose mothers are infected with HBV also are at high risk. The same is true of infants and children whose parents were born in areas where HBV infection is widespread. In many developing countries, the most common method of transmission of the virus is between mother and child or among children living in the same household.

Sometimes you may become infected with HBV even if you have no known risk factors for the disease.

When to seek medical advice

Seek medical care if you have signs or symptoms of hepatitis B or are at risk of the disease and haven't been vaccinated or don't know if you're protected.

Most children in the United States now receive HBV vaccine along with other routine shots. But some children — especially those who don't have access to regular medical care or whose parents are from countries with high infection rates — may be overlooked. If your child hasn't been vaccinated, contact a doctor, your state health department or a public health clinic. Many states offer low-cost or free vaccines for those who need them.

Lifelong monitoring of liver function and screening for liver cancer are important for adults and children with chronic HBV infection. If you or your child has already developed signs of liver disease, your doctor will refer you to a specialist for additional care.
When asked what they least admired about the West, they replied
MORAL DECAY, PROMISCUITY and pornography which...
DEGRADED women.

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Post time 2006-7-3 10:27:42 |Display all floors
Ai yo..you can just direct them to the WHO's website..there is plenty information about that...

Well..its scaring to think about getting HIV..nah..stay away from us...ahahah
I don't know if I like you or love you, want you or need you, all I know is I love the feeling I get when I'm near you.

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Post time 2006-7-3 13:23:59 |Display all floors
I don't believe American have higher STD infected than any developing countries.

Since different countries have different standard to classify STD, we can't say anyone have the highest STD infection until the same standard is applied.

Such as Hepatitis B infection, 120 million, 10 percent chinese are HBV infected, but it don’t be classified as STD in China. Some STD in USA, such as Herpes Virus infection, they are no any information about infected rate available in China.

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Post time 2006-7-3 20:38:21 |Display all floors

Reply #129 szl8179's post

I don't believe American have higher STD infected than any developing countries.

Since different countries have different standard to classify STD, we can't say anyone have the highest STD infection until the same standard is applied.

Such as Hepatitis B infection, 120 million, 10 percent chinese are HBV infected, but it don’t be classified as STD in China. Some STD in USA, such as Herpes Virus infection, they are no any information about infected rate available in China.


My dear, what is your point?

What is it that you want to prove or disprove?



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Whampoa
When asked what they least admired about the West, they replied
MORAL DECAY, PROMISCUITY and pornography which...
DEGRADED women.

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Post time 2006-7-3 22:34:52 |Display all floors

Cont'd .... Hepatitis B

Screening and diagnosis

If you're pregnant, it's important to be checked for HBV early in your pregnancy. Also, get tested if you have unprotected sex with more than one partner, share needles when injecting drugs or have spent time in an area where hepatitis B is widespread.

People who adopt children from areas where hepatitis B is common will want to have their children tested when they arrive in the United States. Tests done in other countries may not always be as reliable. To best meet the special needs of adopted children, doctors usually make testing for HBV part of a comprehensive health evaluation.

You and your children can be tested at your doctor's office, a hospital or a public health clinic. Many public clinics offer free testing for HBV and other sexually transmitted diseases. Testing is important to protect you and your children and to prevent transmission of the virus to others.

Diagnosis based on tests

Because many people with hepatitis B don't have signs and symptoms, doctors diagnose the disease on the basis of one or more blood tests. These tests include:

Hepatitis B surface antigen (HBsAg). Hepatitis B surface antigen is the outer surface of the virus. Testing positive for this antigen means you can easily pass the virus to others. A negative test means you're probably not currently infected.

Antibody to hepatitis B surface antigen (anti-HBs). A positive result on this test means you have antibodies to HBV. This may be due to a prior HBV infection from which you've recovered. Or, you may already have been vaccinated. In either case, you can't infect others or become infected yourself because you're protected by the vaccine or your own natural immunity.

Antibody to hepatitis B core antigen (anti-HBc). Although this test identifies people who have a chronic infection, the results can sometimes be ambiguous. If you test positive for hepatitis B core antibodies, you may have a chronic infection that you can transmit to others. But you also may be recovering from an acute infection or have a slight immunity to HBV that can't otherwise be detected. How this test is interpreted often depends on the results of the other two tests. When the results are uncertain, you may need to repeat all three tests.

Additional tests

If you receive a diagnosis of hepatitis B, your doctor may perform tests to check the severity of the HBV infection as well as the health of your liver. These tests include:

E-antigen test. This blood test looks for the presence of a protein secreted by HBV-infected cells. A positive result means you have high levels of the virus in your blood and can easily infect others. If the test is negative, you have lower blood levels of HBV and are less likely to spread the infection.

Liver enzymes. These blood tests check for elevated levels of liver enzymes such as alanine aminotransferase and aspartate aminotransferase, which leak into the bloodstream when liver cells are injured.

Alpha-fetoprotein (AFP) test. High blood levels of this protein may sometimes be a sign of liver cancer.

Liver ultrasound or computerized tomography (CT) scan. These tests look at the liver for complications such as liver scarring (cirrhosis) or liver cancer.
Liver biopsy. In this procedure, a small sample of liver tissue is removed for microscopic analysis. A biopsy can accurately show the extent of any liver damage and may help determine the best treatment for you.


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Whampoa
When asked what they least admired about the West, they replied
MORAL DECAY, PROMISCUITY and pornography which...
DEGRADED women.

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Post time 2006-7-4 06:30:25 |Display all floors

Cont'd. ... Hepatitis B

Treatment

If you know you've been exposed to HBV, call your doctor immediately. Receiving an injection of hepatitis B immune globulin within 24 hours of coming in contact with the virus may help protect you from developing hepatitis B. You should also receive the first in a series of three shots of the hepatitis B vaccine.

Once you've developed chronic hepatitis B, few treatment options exist. In some cases — especially if you don't have signs and symptoms or liver damage — your doctor may suggest monitoring, rather than treating, your condition. In other cases, your doctor may recommend treatment with antiviral medications. When liver damage is severe, liver transplantation may be the only option.

Drug therapies

Doctors use four drugs to treat chronic HBV infection:

Interferon. Your body naturally produces interferon to help protect against invading organisms such as viruses. Giving additional interferon that has been manufactured in a laboratory may stimulate your body's immune response to HBV and help prevent the virus from replicating in your cells. Not everyone is a candidate for treatment with interferon. In a few cases, interferon eliminates the virus completely, although the infection can later return. Interferon has a number of side effects — many of which resemble signs and symptoms of hepatitis B. These include depression, fatigue, muscle pains, body aches, fever and nausea. Signs and symptoms are usually worse during the first two weeks of treatment and in the first four to six hours after receiving an injection of interferon. A more serious side effect that may occur over time is a decreased production of red blood cells. Two interferon medications are available, interferon alfa-2b (Intron A) and peginterferon alfa-2a (Pegasys). Intron A is administered by injection several times a week. Pegasys is given by injection once a week.

Lamivudine (Epivir-HBV). This antiviral medication helps prevent HBV from replicating in your cells. It's usually taken in pill form once a day. Side effects during treatment are generally minimal, but you may experience a severe worsening of symptoms when you stop taking the drug. Tell your doctor if you have had any kidney problems or history of pancreatitis before starting this medication. If you experience worsening jaundice or any unusual bruising, bleeding or fatigue while taking lamivudine, call your doctor right away.

Adefovir dipivoxil (Hepsera). This drug, taken by pill once daily, also helps prevent HBV from replicating in your cells. An added benefit is that it's effective in people who are resistant to lamivudine. Like lamivudine, side effects during treatment usually are minimal, but symptoms may worsen when you go off the medication. And Hepsera may cause kidney toxicity in people with underlying kidney disease.
Entecavir (Baraclude). This antiviral medication, approved by the Food and Drug Administration in March 2005, is taken once a day in pill form. Studies comparing Baraclude with lamivudine found Baraclude to be more effective. Baraclude may cause serious worsening of symptoms when the drug is discontinued.

Liver transplantation

When your liver has been severely damaged, a liver transplant may be an option. The encouraging news is that these transplants are increasingly successful. Unfortunately, not enough donor organs are available for every person who needs a transplant.


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Whampoa
When asked what they least admired about the West, they replied
MORAL DECAY, PROMISCUITY and pornography which...
DEGRADED women.

Use magic tools Report

Rank: 4

Post time 2006-7-4 11:39:24 |Display all floors

Reply #130 whampoa's post

My point is the east heritage and familial value is nothing when human face diseases. We are all vulnerable to STD. Focusing on founding and treatment innovation is much better than relaying on such familial value.

That is quite easy to explain why over 95% HIV carriers are in the developing countries, comparing with huge money poured into medical care in industrial countries, people living in developing countries can’t even afford a condom to protect themselves.

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