Description
Urine, NA, Fasting or Non Fasting: As suggested by doctor
Sample Required:
Synovial fluid, which is the lubricating fluid found in joints, is collected for this test.
Test Time:
Results are usually available within a few hours to a day after the sample is collected.
Test Normal Range:
The normal range does not apply to this test. The presence of acid-fast bacilli (AFB) in synovial fluid may indicate mycobacterial infection.
What is the Test?
The AFB Stain, Synovial Fluid test is a microscopic examination of synovial fluid to detect the presence of acid-fast bacilli (AFB), which are characteristic of mycobacteria such as Mycobacterium tuberculosis.
Test Procedure:
Synovial fluid is collected from a joint using a syringe and needle. The collected fluid is then processed and stained using the Ziehl-Neelsen stain. The stained slide is examined under a microscope for the presence of red-stained AFB against a blue background.
When to Take the Test:
This test is ordered when there is a suspicion of mycobacterial infection in a joint, such as tuberculosis arthritis.
Who Should Take This Test:
Individuals with symptoms of joint infection, such as joint pain, swelling, and limited mobility, where mycobacterial infection is suspected, may undergo this test.
Precautions for Exceptional Cases:
Pregnant individuals and those with compromised immune systems should inform their healthcare provider before taking the test.
FAQs:
Q1: Can synovial fluid be collected from any joint?
A: Synovial fluid is typically collected from larger joints, such as the knee or shoulder, where there may be signs of infection.
Q2: Is joint infection common?
A: Joint infections, especially those caused by mycobacteria, are relatively rare but can lead to severe complications if not treated promptly.
Q3: What other tests are done alongside AFB staining for joint infections?
A: In addition to AFB staining, cultures and molecular tests may be performed to identify the specific microorganism causing the joint infection.
Q4: Can tuberculosis arthritis be treated effectively?
A: Yes, tuberculosis arthritis can often be treated with antibiotics. However, treatment duration may be longer compared to other types of joint infections.
Q5: Are there any risks associated with synovial fluid collection?
A: The procedure carries minimal risks, but proper sterile technique is crucial to prevent contamination and infection.
