Wednesday, September 21, 2022

Blood Test For Hepatitis C Virus

What Do The Results Mean

New Study Has Global Impact On Hepatitis C Elimination Efforts

A negative result means you probably don’t have a hepatitis infection. A positive result may mean you have or previously had an infection from hepatitis A, hepatitis B, or hepatitis C. You may need more tests to confirm a diagnosis. If you have questions about your results, talk to your health care provider.

Learn more about laboratory tests, reference ranges, and understanding results.

Identifying Patterns Of Risky Behavior

Screening is an opportunity to draw attention to the clients behaviors that put him or her at risk for contracting :

  • Ask for the clients perception of his or her risk for having contracted : How likely do you think it is that the test will be positive?
  • Listen for and identify behaviors that put the client at risk for contracting , B, and C and HIV, especially unprotected sex and sharing injection drug paraphernalia.
  • Assess the clients alcohol consumption.

Recommendations Regarding Linkage To Care

All persons identified with active hepatitis C infection should be linked to a medical provider who can provide competent and comprehensive management of HCV. Available data suggest that in the current era, nonspecialists can effectively manage HCV, especially with back up and consultation for more complicated issues. The management of patients with decompensated cirrhosis should always involve a hepatologist. In addition, persons with HCV who have renal insufficiency or extrahepatic complications of HCV infection will likely require referral to a specialist. An individual with a positive HCV antibody test but negative HCV RNA level does not require a referral for further evaluation and management of HCV infection.

Also Check: Just Food For Dogs Hepatic

Hcv Core Antigen Testing

The hepatitis C core antigen is a viral protein. Since the core antigen is part of hepatitis C virus, it can usually be found in the bloodstream two weeks after infection.

Since HCV core antigen testing is simpler and less expensive than viral-load testing, some experts suggest using it in resource-limited settings. Core antigen testing can be usedoften with HCV antibody testingto detect acute HCV or to confirm chronic HCV infection. HCV core antigen testing can also be used to measure treatment outcome. Although it does not detect low levels of HCV , usually the hepatitis C viral load is much higher in people who relapse after HCV treatment.

Characteristics Of Antibody Tests For The Diagnosis Of Chronic Hcv Infection

Hepatitis C window period: When can you get tested?

Currently available EIA tests are highly sensitive and useful for screening. However, among a population with low risk, even a highly sensitive test does not provide the desired predictive value of a positive test. The lower the likelihood of infection, the higher the risk of a false positive test. Conversely, the higher the risk of hepatitis C in the population, the greater the likelihood that a positive screening EIA test indicates infection. In populations with otherwise unexplained ALT elevation and at least one major risk factor for hepatitis C, the positive predictive value of a positive EIA is at least 95%. This value declines to less than 50% for patients with normal ALT levels and minimal or no risk factors.38

Two strategies have been employed to decrease the possibility of “false positive” EIA tests:

  • Recalibration of the EIA test value called “positive” has allowed a higher degree of positive prediction for the test in general. This gives the EIA test excellent characteristics for use in appropriate populations, and simplifies the use of confirmatory tests.
  • Confirmatory testing for more specific antibody to hepatitis C virus. The recommended test is the RIBA to confirm a positive EIA test in a patient with low risk for hepatitis C.

Recommended Reading: Can Hepatitis B Be Cured With Antibiotics

Questions For Your Doctor About Test Results

Patients receiving hepatitis C testing may find it helpful to ask questions about their test results. Questions to consider include:

  • What type of hepatitis C test did I receive?
  • What was my test result?
  • How do you interpret the results of the hepatitis C tests that I had?
  • Do I need any follow-up tests based on my test result?

Other Things To Know:

  • After a successful course of treatment for hepatitis C, the hepatitis C antibody remains detectable, but the hepatitis C RNA will be undetectable.
  • If you plan to donate blood, you will be tested for the hepatitis C antibody and will be turned away even if you do not have an active infection.
  • Any patient with a positive test result for the hepatitis C antibody should have additional tests to determine whether or not the virus is still active.

Read Also: Doctors And Medical Specialists For Hepatitis B

Testing Procedures And Costs

The test for HCV antibodies, as well as follow-up blood tests, can be done in most labs that perform routine blood work.

A regular blood sample will be taken and analyzed. No special steps, such as fasting, are needed on your part.

Many insurance companies cover hepatitis C testing, but check with your insurer first to be sure.

Many communities offer free or low-cost testing, too. Check with your doctors office or local hospital to find out whats available near you.

Testing for hepatitis C is simple and no more painful than any other blood test.

But if youre at risk for the disease or think you may have been exposed to the virus, getting tested and starting treatment if necessary can help prevent serious health problems for years to come.

CDC recommends that all adults ages 18 years and older should be screened for hepatitis C except in settings where the prevalence of HCV infection is less than 0.1%.

Also, all pregnant women should be screened during each pregnancy, except in setting where the prevalence of HCV infection is less than 0.1%.

Hepatitis C is often associated with sharing needles . But there are other methods of transmission.

For example, healthcare workers who are regularly exposed to other peoples blood are at higher risk for contracting the virus.

Getting a tattoo from an unlicensed tattoo artist or facility where needles may not be properly sterilized also increases the risk of transmission.

Addressing Hepatitis For The First Time

Hepatitis C Screening

It is crucial that a treatment counselor or health professional use a nonjudgmental and compassionate tone. Clients need to feel comfortable disclosing information about their health and risky behaviors. The following strategies can help initiate the conversation:

  • Display posters, literature, or other -related items that could help prompt the client to ask questions about hepatitis. .
  • Assess clients ability to discuss , based on their degree of openness in the counseling session, the amount of detail they provide in their responses, and the length of the therapeutic relationship.
  • Raise the subject in a way that avoids making clients feel defensive or afraid. Consider introducing the subject by making parallels with other conditions that have been discussed. Say, for example, You said you were tested for HIV several times. Were you ever tested for viral ? or You mentioned that your friend is sick with HIV. Have you been tested for HCV or HIV? Tell me about those tests.
  • Be patient and allow time for multiple, short conversations about the subject. This might ease feelings of fear, anxiety, or shame.

Also Check: Can You Catch Hepatitis C From Sex

Testing For Hcv Infection

The recommendations for testing are derived from published evidence and expert opinions.22,23 There are many options for HCV testing and, as newer diagnostic technologies are introduced, HCV testing should become more streamlined. Also, some providers will have limited choices for testing because of laboratory testing protocols and reimbursement issues. Providers are advised to consult with their laboratories for information regarding available tests and testing protocols.

Recommendations

All patients suspected of having infection with HCV should be tested for antibody to HCV using an EIA screening test. In low-risk patients with a positive EIA test, confirmatory testing with the recombinant immunoblot assay should be performed. For patients at low risk with a positive EIA and RIBA, confirmatory testing with a qualitative PCR test for detection of HCV RNA should be performed.

For patients at moderate or high risk and/ or unexplained elevated serum alanine aminotransferase value, a positive EIA should be followed by a qualitative test for HCV RNA in the blood.

For immunocompromised patients at high risk with unexplained elevated ALT value and a negative screening EIA, a qualitative test for detection of HCV RNA should be performed to diagnose HCV infection.

Testing For Hepatitis C

Two tests need to be done to discover if you have hepatitis C:

  • Antibody test: Which establishes whether you have ever been exposed to the hepatitis C virus.
  • PCR test: Which establishes whether the virus is still active and needs treating.

The two tests can often be done from one sample of blood which means you may only need to provide the sample once. Both tests can then be done on your sample at the laboratory. However, some services will perform one test and then call you back for a further blood sample to perform the second test.

Antibody test

A hepatitis C antibody test is the first test undertaken. This is to determine whether you have ever been exposed to the hepatitis C virus. It works by testing for the presence of antibodies to the virus generated by your immune system. If you receive a negative hepatitis C antibody test but have been experiencing symptoms or have been recently exposed to hepatitis C, then you are likely to be advised to have a second test.

It is important to remember that there is a ‘window period’. This is the short period of time when your immune system may not have had time to produce antibodies. It usually takes between six and twelve weeks for these antibodies to develop. However, in a few people it can take up to six months. So if you have the test within this window period and the result is negative, it does not necessarily mean that you don’t have the virus.

PCR test

Don’t Miss: Hepatitis B Surface Antibody Ql

What To Think About

  • There is no vaccine to prevent infections with the hepatitis C virus.
  • All donated blood and organs are tested for hepatitis C before being used.
  • Other tests that show how well the liver is working are usually done if your doctor thinks you may have hepatitis C. These may include blood tests for bilirubin, alkaline phosphatase, alanine aminotransferase, and aspartate aminotransferase.
  • Aspartate Aminotransferase
  • Provinces require that some types of hepatitis infections be reported to the local health unit. The health unit can then send out a warning to other people who may have been infected with the hepatitis virus, such as those who are close contacts of someone who has hepatitis C.
  • Counseling Practices That Educate Support And Motivate Clients Undergoing Screening

    CDC Vital Signs: Dramatic Increases in Hepatitis C

    Clients might need help deciding whether to get screened, understanding the test results, and determining their next steps. Even when services offered through the substance abuse treatment program are limited, discussing testing with clients presents an opportunity for counselors to motivate clients for change by confronting substance use and by making choices that improve their overall health. However, this may also be true when services are offered on-site through substance abuse treatment programs. A study at one methadone clinic that offered hepatitis screening and vaccination revealed that although the majority of clients completed screening , only 54.7 percent of clients who lacked for hepatitis A received vaccinations and only 2.9 percent of clients who lacked immunity for received vaccinations .

    The Consensus Panel makes the following general recommendations while recognizing that, in some programs, the counselors role may be limited:

    Read Also: Medicine That Cures Hepatitis C

    Immunoassays For Hcv Core Antigen

    As an HCV diagnostic marker, HCV core antigen has been studied, either alone or as an HCV antibody-HCV antigen combination assay. Some experts have proposed use of an HCV core antigen test as a less expensive option than HCV RNA testing, but there are no HCV antigen assays that are FDA-approved for use in the United States at this time.

    Why The Test Is Performed

    Your provider may order this test if you have signs of hepatitis. It is used to:

    • Detect current or previous hepatitis infection
    • Determine how contagious a person with hepatitis is
    • Monitor a person who is being treated for hepatitis

    The test may be performed for other conditions, such as:

    • Chronic persistent hepatitis

    Don’t Miss: How Do You Get Hepatitis C From Alcohol

    Can Hepatitis C Be Treated

    Yes, since 2010 enormous progress has been made in the treatment of chronic hepatitis C. New therapies called direct-acting antivirals are pills that act on the virus itself to eradicate it from the body, unlike older medicines like interferon injections which work by stimulating an immune response. These new treatments are very effective and can achieve cure rates of over 90%. In most situations now, there is no need for interferon, which was responsible for many of the side effects previously associated with HCV treatment. The new treatment combinations require shorter treatment durations , have reduced side effects and appear to be effective at all stages of the disease.

    Because these new therapies are very new, they remain very expensive. As such, drug coverage from both government and private companies may require that your liver disease has progressed to a certain stage before they are willing to cover the cost of these drugs.

    Your primary care physician may refer you to a specialist to determine whether you are eligible for treatment. A specialist will help you decide which drug therapy is best for you based on the severity of your liver disease, your virus genotype and whether or not you have been treated in the past.

    Hepatitis C Is Often Asymptomatic

    Dr. Nancy Reau Explains Hepatitis C

    Offer testing to anyone with a risk factor or clinical indication.

    Risk factors:

    • shared drug-use equipment, even once
    • received personal services , with nonsterile equipment
    • exposed to blood during sexual activity
    • received blood, blood products, or organ transplant before 1992
    • received medical care where non-sterile equipment may have been used
    • born, travelled, or lived in a region where hepatitis C is common
    • born to a mother with hepatitis C
    • diagnosis of HIV or hepatitis B
    • clinical clues or symptoms of liver disease
    • occupational exposure

    Recommended Reading: Can Hepatitis C Be Cured Totally

    Preparation Prior To Transport

    Label the specimen container with the patients full name, date of collection and one other unique identifier such as the patients date of birth or Health Card Number. Failure to provide this information may result in rejection or testing delay.

    Centrifuge if using SST. Place specimen in biohazard bag and seal. Specimens should be stored at 2-8°C following collection.

    Specimens more than 7 days post collection will not be tested.

    Educating Clients About Viral Hepatitis

    Clients may believe they know about viral , but their understanding of the disease may not be accurate. It is easy to confuse the three main types of viral , B, and C. Clients may have formed impressions based on limited or incorrect information. Counselors should briefly describe hepatitis A, B, and C, including their prevalence, , and relationship to drug use, as well as to other infections, such as HIV and sexually transmitted diseases. Specific strategies for speaking with clients include:

    • Speak clearly and keep the message simple, focused, and brief.
    • Use language, examples, and concepts that the client understands.
    • Use appropriate visual aids.
    • Frame numerical statements in terms that are easy to visualize. Say 5 out of 100 people rather than 5 percent of the population say more than half instead of the majority.
    • Repeat the information at different times in different ways. The average client retains only approximately one-third of what he or she is told. Summarize essential points.
    • Pay attention to a clients response to the information. For example, if a client stiffens his or her posture, consider saying, I notice that this topic seems to make you uncomfortable. It does for a lot of people. Please tell me what youre feeling right now. Id really like to help you with this.
    • Use the opportunity to describe the potential detrimental effects of alcohol and other substance use on the liver of a person who is infected with HCV.

    Read Also: How To Find Out If You Have Hepatitis

    What Does A Reactive Hcv Antibody Test Result Mean

    A reactive or positive antibody test means you have been infected with the hepatitis C virus at some point in time.

    Once people have been infected, they will always have antibodies in their blood. This is true if they have cleared the virus, have been cured, or still have the virus in their blood.

    A reactive antibody test does not necessarily mean that you currently have hepatitis C and a follow-up test is needed.

    Who Should Get Tested

    Testing Is the Only Way to Know for Sure

    You should consider getting tested for hepatitis C if you’re worried you could have been infected or you fall into one of the groups at an increased risk of being infected.

    Hepatitis C often has no symptoms, so you may still be infected if you feel healthy.

    Some groups of people are at an increased risk of hepatitis C, including:

    • ex-drug users and current drug users, particularly users of injected drugs
    • people who received blood transfusions before September 1991 or blood products before 1986 in the UK
    • UK recipients of organ or tissue transplants before 1992
    • people who have lived or had medical treatment in an area where hepatitis C is common high-risk areas include Africa, the Middle East and central Asia
    • babies and children whose mothers have hepatitis C
    • anyone accidentally exposed to the virus, such as health workers
    • people who have received a tattoo or piercing where equipment may not have been properly sterilised
    • sexual partners, family members and close contacts of people with hepatitis C

    If you continue to engage in high-risk activities, such as injecting drugs frequently, regular testing may be recommended. Your doctor will be able to advise you about this.

    Read Also: Can You Get Rid Of Hepatitis C

    Popular Articles
    Related news