1) Can you
have a normal liver enzyme (e.g., ALT) level and still have chronic hepatitis
C?
Yes.
It is common for persons with chronic hepatitis C to have a liver enzyme
level that goes up and down, with periodic returns to normal or near normal.
Some persons have a liver enzyme level that is normal for over a year but
they still have chronic liver disease. If the liver enzyme level is normal,
persons should have their enzyme level re-checked several times over a
6 to 12 month period. If the liver enzyme level remains normal, your doctor
may check it less frequently, such as once a year.
2) What
is the risk that HCV infected women will spread HCV to their newborn infants?
About
5 out of every 100 infants born to HCV infected women become infected.
This occurs at the time of birth, and there is no treatment that can prevent
this from happening. Most infants infected with HCV at the time of birth
have no symptoms and do well during childhood. More studies are needed
to find out if these children will have problems from the infection as
they grow older. There are no licensed treatments or guidelines for the
treatment of infants or children infected with HCV. Children with elevated
ALT (liver enzyme) levels should be referred for evaluation to a specialist
familiar with the management of children with HCV-related disease.
3) Can Mosquitos
Transmit HCV?
Researchers
have determined that the hepatitis C virus is not transmitted by mosquitos.
There is a lack of epidemiological or physical evidence that it is mosquito-borne
and experiments to see any HCV replication in mosquito cells have failed.
There
are two ways that mosquitos can transmit illness to humans. These are "mechanical
transmission" in which a small amount of blood may be present on the mosquito's
feeding spike. This type of transmission does not occur with serious human
diseases such as HCV, HBV, or HIV. The second way mosquitoes transmit disease
is called "biological" transmission. Studies show that mosquitoes can swallow
viruses into their middle gut, but once there the virus dies and is digested
in the same way we digest food - by breaking it down using acid.
4) What
are the chances of persons with HCV infection developing long term
infection, chronic liver disease, cirrhosis, liver cancer, or dying as
a result of hepatitis C?
Of
every 100 persons infected with HCV about:
7) Is it
necessary to do genotyping when managing a person with chronic hepatitis
C?
No.
Although persons with genotype 1 respond less often to treatment, genotype
should not be a deciding factor on whether or not to treat. With newer
therapies, however, treatment regimens might differ on the basis of genotypes.
8) Why do
most persons remain infected?
Persons
infected with HCV mount an antibody response to parts of the virus, but
changes in the virus during infection result in changes that are not recognized
by preexisting antibodies. This appears to be how the virus establishes
and maintains long-lasting infection.
9) Can persons
become infected with different genotypes?
Yes.
Because of the ineffective immune response described above, prior infection
does not protect against reinfection with the same or different genotypes
of the virus. For the same reason, there is no effective pre- or
postexposure prophylaxis (i.e, immune globulin) available.
10) How
Do I Clean Up Blood Spills?
A
10% bleach (soak for 30 minutes) should be used on all contaminated surfaces.
There is no proof that this KILLS everything, but you can't autoclave the
world. There are also chemical disinfectants containing phenols and other
very expensive ingredients, but for home use bleach is the best we have.
Bleach can be VERY VERY corrosive on some surfaces..so be careful what
you slop it on.
11) Is HCV
the Same Thing as HIV?
Yes
and No. HIV and HCV are both RNA viruses. That is both use RNA to carry
their genetic code until they find a yummy host! However, these viruses
belong to two entirely different families. Sort of like whales and humans
are both mammals, but boy what a difference. They have completely different
strategies for replication and for survival. HIV is a retrovirus, and once
the virus is in a human cell it copies itself to DNA and migrates into
the cell nucleus andintegrates into the host genome and is then copied
everytime the cell copies it's own DNA. Retro meaning it reverts to a DNA
virus once it is in the cell. Other retro viruses are HTLV viruses like
some types of leukemia. HCV
is a flavivirus. It is related to yellow fever and dengue fever viruses.
It replicates by making positive and negative RNA strands and does not
make DNA or integrate into the host genome. There
are lots of other structural and envelope differences between these two,
but the main point is that HIV and HCV are NOT very similar at all--except
they both completely screw up the immune system and there is no known cure.
12) How
Do We Know If The Interferon Is Working?
Your
doctor and nurse will use several methods to measure how well your treatments
are working. You will have frequent physical exams and blood tests. Don't
hesitate to ask the doctor about the test results and what they show about
your progress. While
tests and exams can tell a lot about how the interferon is working, side
effects tell very little. Sometimes people think that if they don't have
side effects, the drugs aren't working or that if they do have side effects,
the drugs are working well. Side effects vary so much from person to person,
that having them or not having them usually isn't a sign of whether the
treatment is effective. If you do have side effects, there is much you
can do to help relieve them. It is especially important that you rest when
you feel you need to as well as drinking as much, if not more, water than
you can stand. If
you are reading this section before you begin taking interferon, you may
feel overwhelmed by the wide range of side effects it describes. But remember:
Every person doesn't get every side effect, and some people get few, if
any. In addition, the severity of side effects varies greatly from person
to person. Whether you have a particular side effect, and how severe it
will be, depends on your own particular doseage and injection schedule,
and how your body reacts. Be sure to talk to your doctor and nurse about
which side effects are most likely to occur for you, how long they might
last, how serious they might be, and when you should seek medical attention
for them.
13) What
About High Iron Levels?
A
new study published in the fall issue of American Journal of Gastroenterology,
Vol 89, No. 7, suggests that using "Iron Reduction Therapy" along with
interferon can result in an effective cure rate in the area of 75-80% and
that adding cytokines and antivirals such as ribavirin can improve effectiveness
even further. The theory behind this is that viruses need iron to replicate,
and by reducing the hepatic iron in the liver you prevent them from replicating.
It should be notedthat this new procedure is not yet FDA approved and is
still in the early trial stages. Iron
is an element required for replication of virtually all virulent microorganisms.
Reducing the amount of iron helps to limit the replication of the hepatitis
C virus. Increases
in levels of serum ferritin, iron, and transferrin saturation also have
been noted with high frequencies in patients with chronic hepatitis C,2
and the higher levels have, in general, been associated with lesser likelihood
of response to interferon therapy.
14) What
Else Should I Know About HCV?
Medical
research and acceptance of the illness will develop only if our national
support organizations which promote them are strong. Be sure to support
your national groups, and when your national group calls for letters and
phone calls to be sent to public officials and media, please get your family
and friends to assist you in responding to those requests. We may be able
to make greater achievements if we act in unison.
In
the USA, the largest source of research money comes from government allocations.
Therefore, contacting your Congressman about the importance of Hepatitis
research is very important.
Did you know?
SOURCES:
Centers for Disease Control
National Institutes of Health
Hepatitis Foundation International