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| | Hepatitis
 The
liver is the largest organ in the body. It sits in the right-upper abdomen just
under the right lung and behind the ribs. It is one of the body's most versatile
organs because it performs so many functions all at the same time. The liver
makes proteins, eliminates waste material from the body, produces and
metabolizes cholesterol, stores and releases glucose energy, and metabolizes
many drugs used in medicine. It produces bile that flows through bile ducts into
the intestine to help digest food. This remarkable organ also has the ability to
regenerate itself if it is injured or partially removed. The liver receives
blood from two different sources -- the heart and the intestines. All of this
blood flows through the liver and returns to the heart. It is no wonder that the
ancient Chinese viewed the liver, not the heart, as the center of the body.
What Is Hepatitis?
Any type of inflammation in the liver is called hepatitis. This inflammation can
be caused by many different things: drugs, viruses, bacteria, heredity, fatty
tissue, and other causes.
What Are the Types of Viral Hepatitis?
Type A -- Previously known as infectious hepatitis, it can be
contracted through contaminated water or food. During the acute infection, the
patient's blood and body fluids are also infectious. Although some patients
become acutely and desperately sick from this infection, most people tolerate
it well and fully recover. No chronic infection occurs with this virus.
Type B -- Previously known as serum hepatitis. Patients are sicker
initially with this very unpleasant virus and take longer to recover,
some-times several months. Furthermore, about 10 percent of patients progress
into a state of chronic smoldering infection in the liver. A person can be
infected by a contaminated needle or through sexual contact. Homosexual men,
intravenous drug users, or persons who have sexual contact with these people
are at an especially high risk for contracting this disease.
Type C -- This virus infection was previously known as non-A non-B
hepatitis. In the past, it was transmitted mostly by blood transfusion. There
are now good blood tests to check for this virus before blood is given. Most
cases now occur in people who use contaminated needles for drug use. However,
many cases are "community acquired," meaning the physicians really
don't know how they occur. It is difficult, but not impossible, to transmit
this virus by unprotected sexual intercourse. Many people who acquire this
infection go on to a chronic phase.
Other Viruses -- There are now types recognized -- D, E, and G
viruses -- that can cause hepatitis. Infectious mono virus, CMV virus, and
several other viruses are also capable of infecting the liver.
Are There Other Causes?
Alcohol -- Binge drinking of alcohol can inflict an acute hepatitis
injury on the liver.
Drugs -- Certain drugs also can acutely injure the liver in a few
people who are hypersensitive or allergic to a particular medicine.
Autoimmune -- There are certain conditions similar to the disease
called lupus erythematosus, which can produce injury to the liver. They are
known as autoimmune disorders because the body's own antibody defenses seem to
actively damage the liver.
Hereditary Conditions -- There are certain hereditary disorders,
such as Wilson's disease, in which acute damage to the liver can occur.
Symptoms
As with other illnesses, symptoms of hepatitis can be severe, mild, or not
present at all. It depends on how badly the liver is damaged. With mild viral
hepatitis, slight fatigue may be the only symptom. When hepatitis is severe, the
patient loses the taste for food and cigarettes, develops a heaviness in the
right-upper abdomen and, especially with acute B hepatitis, may have diarrhea
and arthritis. The liver and even the spleen can enlarge. jaundice then
develops. The eyes and skin turn yellow, the urine dark, and the stool a
putty-white color. Jaundice results when the yellow bile pigment, which normally
flows through the bile ducts to the intestine, backs up and spills into the
blood. Acute hepatitis can last from two weeks to several months. The patient
often needs to be hospitalized in the early, acute phase of the illness.
 Diagnosis
The physician often suspects hepatitis based on the patient's medical history
and physical exam. Certain blood tests, however, are the best indicators of
hepatitis, its causes, and its severity. Blood tests are used to follow the
course of the infection through to recovery. Additional tests, such as
ultrasound (sonography), are performed to study the bile ducts, gallbladder, and
liver. Occasionally a liver biopsy may be needed to provide information to the
physician.
Treatment
No specific treatments are available for acute viral hepatitis. Fortunately, in
most cases the body develops antibodies that fight and eventually kill the
virus, allowing the liver to recover. For alcohol and drug-induced hepatitis,
the patient has to avoid the offending agent. The physician must make an
accurate diagnosis, support the patient during the acute phase, and provide
advice during recovery. Recovery from viral hepatitis A and B results in
protective antibodies so that the patient will not get these infections again
and cannot transmit them to anyone else.
Chronic Phase
Some people progress to chronic hepatitis. Here, the liver smolders with
persistent inflammation. These patients need to be followed closely, usually by
a specialist, to address the various problems that can arise from this
condition. Effective treatment is available for many types of chronic hepatitis.
Because some of these patients are infectious and can transmit the disease, they
and their families must be educated about how to protect themselves.
Contagion and Spread
In the past, viral hepatitis had a well-deserved reputation for being
contagious. Contaminated water and poor sanitation provided easy transmission
for these viruses. Today, much is known about how the viruses are transmitted so
that prevention is usually possible.
However, infection still can occur through contaminated water or poor
sanitation. In addition, during the acute phase, all body secretions -- saliva,
tears, semen, urine, and especially blood -- are infectious. Sexual contact with
someone who is infected is known to spread the virus. Also, if a patient is a
carrier in the chronic phase, the infection may be spread through sexual
contact. Intravenous drug users who share needles are at an extremely high risk
of contracting hepatitis, as are people who have multiple sexual partners.
Because each hepatitis virus is different, it is always best to discuss this
with a physician.
Vaccination
Passive (short-acting) and active (permanent and long-lasting) vaccines now are
available against hepatitis A and B. People who travel to underdeveloped
countries are encouraged to receive these vaccinations. The following high-risk
groups should also receive active immunization: health care workers, especially
those who handle body fluids such as blood; people who have multiple sex
partners; intravenous drug users; and prostitutes. The American Pediatric
Association now recommends that all infants and children be vaccinated.
Summary
Hepatitis, especially viral hepatitis, is a potentially serious disease with
long-term consequences. Most people infected with the virus, however, have a
full recovery without any specific therapy. Current knowledge about the disease
and advances in vaccination make prevention a realistic goal for everyone.
Non-viral types of hepatitis may often be controlled by treating the underlying
causes. People who follow the advice of their physicians have every reason to
expect a full and active life.
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