Babesia Microti (IgG,IgM)

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Also known as: Babesia Microti IgGIgM

Babesia Microti IgG

Babesia Microti IgM


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The Babesia Microti (IgG,IgM) test contains 1 test with 3 biomarkers.

Brief Description: The Babesia Microti IgG/IgM Antibodies test is a laboratory examination that detects the presence of antibodies against Babesia microti, a parasite that causes babesiosis, a tick-borne illness. This test is crucial for diagnosing active or past infections of babesiosis.

Collection Method: Blood Draw

Specimen Type: Serum

Test Preparation: No preparation required

When and Why the Test May Be Ordered:

A Babesia Microti IgG/IgM Antibodies test may be ordered when a patient presents with symptoms suggestive of babesiosis, especially in regions where the disease is prevalent or after potential exposure to ticks. Symptoms include fever, fatigue, muscle aches, and sometimes hemolytic anemia. The test is also important for individuals with a weakened immune system, as babesiosis can be severe in these cases.

What the Test Checks For:

The Babesia Microti IgG/IgM Antibodies test primarily checks for the presence of immunoglobulin G (IgG) and immunoglobulin M (IgM) antibodies against the Babesia microti parasite. IgM antibodies are produced in the early stages of infection, while IgG antibodies develop later and may persist after the infection has resolved.

Other Lab Tests That May Be Ordered Alongside:

When a Babesia Microti IgG/IgM Antibody test is ordered, it's often part of a broader evaluation for tick-borne diseases and related health issues. Here are some tests commonly ordered alongside it:

  1. Lyme Disease Serology (ELISA and Western Blot):

    • Purpose: To test for Borrelia burgdorferi, the bacterium that causes Lyme disease.
    • Why Is It Ordered: Because Babesiosis and Lyme disease are both transmitted by ticks, individuals exposed to one may also be at risk for the other.
  2. Complete Blood Count (CBC) with Differential:

    • Purpose: To evaluate overall blood health.
    • Why Is It Ordered: To check for signs of anemia or other hematological abnormalities that can occur with Babesiosis, as the parasite infects red blood cells.
  3. Liver Function Test:

    • Purpose: To assess liver health.
    • Why Is It Ordered: To evaluate for liver involvement, as Babesiosis can sometimes affect liver function.
  4. Serum Creatinine and Blood Urea Nitrogen (BUN):

    • Purpose: To assess kidney function.
    • Why Is It Ordered: To evaluate renal function, as severe cases of Babesiosis can lead to kidney damage.
  5. Anaplasma and Ehrlichia Serology:

    • Purpose: To test for Anaplasmosis and Ehrlichiosis, other tick-borne diseases.
    • Why Is It Ordered: To check for co-infections, as ticks can transmit multiple pathogens simultaneously.
  6. Urinalysis:

    • Purpose: To analyze various components of the urine.
    • Why Is It Ordered: To check for proteinuria, hematuria, or other urinary abnormalities that can be associated with Babesiosis.

These tests, when ordered alongside a Babesia Microti IgG/IgM Antibody test, provide a comprehensive evaluation of potential tick-borne diseases and their impact on health. They are crucial for diagnosing and managing Babesiosis and for identifying any co-infections or related complications. The specific combination of tests will depend on the individual’s symptoms, exposure history, and clinical presentation.

Conditions or Diseases Requiring the Test:

  1. Babesiosis: This tick-borne disease is caused by the Babesia microti parasite and can lead to symptoms ranging from mild to severe, particularly in people with compromised immune systems.

How Health Care Providers Use the Results:

  • Diagnosis: A positive result for IgM antibodies indicates a recent or active infection, while the presence of IgG antibodies suggests a past infection or potential immunity.
  • Treatment Planning: The results guide healthcare providers in determining appropriate treatment options, especially in cases of symptomatic or severe babesiosis.
  • Monitoring: In some cases, follow-up tests may be ordered to track changes in antibody levels, helping to assess the effectiveness of treatment.

In conclusion, the Babesia Microti IgG/IgM Antibodies test is a critical tool for diagnosing babesiosis, a tick-borne illness caused by the Babesia microti parasite. Early detection and management are essential for providing appropriate treatment and preventing complications, especially in individuals with compromised immune systems.

Most Common Questions About the Babesia Microti IgG IgM Antibodies test:

Clinical Utility and Interpretation

What is the primary purpose of the Babesia Microti IgG IgM Antibodies test?

The Babesia Microti IgG IgM Antibodies test is designed to detect antibodies against Babesia microti, the primary cause of babesiosis in the U.S. The presence of these antibodies can indicate a recent or past infection with the parasite.

What conditions or disorders can the Babesia Microti IgG IgM Antibodies test help diagnose?

The test aids in diagnosing babesiosis, a malaria-like illness transmitted by ticks. Babesiosis is caused by the parasite Babesia microti, which infects and destroys red blood cells.

Clinical Applications and Diagnoses

Why might a doctor recommend the Babesia Microti IgG IgM Antibodies test?

A doctor may recommend this test if a patient presents with symptoms suggestive of babesiosis, such as fever, fatigue, and hemolytic anemia, especially if there's a history of tick exposure or if the patient resides in or has traveled to an endemic area.

If the Babesia Microti IgG IgM Antibodies test is positive, what are the next diagnostic steps?

A positive result suggests exposure to Babesia microti. However, it's essential to correlate with clinical symptoms and other diagnostic methods like microscopy to confirm active infection. Additional tests, like PCR or blood smears, may be used to detect the parasite's DNA or visualize it directly in the blood.

Understanding Limitations and Challenges

What are false negatives and false positives in the context of the Babesia Microti IgG IgM Antibodies test?

False negatives may occur if the test is taken too early after exposure, before the immune system has had a chance to produce detectable levels of antibodies. False positives might arise due to cross-reactivity with antibodies produced against other pathogens, or from non-specific reactions in the test.

What is the difference between IgG and IgM in the context of the Babesia Microti IgG IgM Antibodies test?

In the Babesia Microti IgG IgM Antibodies test, IgM antibodies typically appear first and indicate a recent infection. IgG antibodies develop later and can remain for years, indicating past exposure or infection.

Additional Questions and Insights

Are there specific tick species responsible for transmitting Babesia microti?

Yes, the primary vector for Babesia microti in the U.S. is the black-legged tick (Ixodes scapularis), which is also responsible for transmitting the bacteria causing Lyme disease.

How does the Babesia Microti IgG IgM Antibodies test differ from direct microscopic examination for babesiosis diagnosis?

The Babesia Microti IgG IgM Antibodies test detects the body's immune response to the parasite, indicating exposure. In contrast, direct microscopic examination visualizes the parasite within red blood cells, confirming an active infection. The antibody test can detect past infections, while microscopy is more indicative of a current infection.

Are co-infections possible, and can this test detect them?

Co-infections with other tick-borne diseases, like Lyme disease or anaplasmosis, are possible. However, the Babesia Microti IgG IgM Antibodies test specifically detects antibodies against Babesia microti and does not indicate the presence of other infections. Separate tests would be needed for other suspected pathogens.

We advise having your results reviewed by a licensed medical healthcare professional for proper interpretation of your results.

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