In the medical and microbiology fields, laboratory tests are crucial for diagnosing severe bacterial infections. One of the most common and important tests for lung infections is the AFB test.
The test usually requires examining a sample of sputum coughed up from the lungs.
The 'Ziehl-Neelsen stain' is the most common method used in the AFB test.
A positive AFB smear indicates an active mycobacterial infection, usually TB.
The full form of AFB is Acid-Fast Bacillus.
The AFB smear and culture test is primarily used to detect Tuberculosis (TB). Mycobacterium tuberculosis, the bacteria that causes TB, is the most common and dangerous acid-fast bacillus. If a patient has a persistent cough, fever, and weight loss, doctors will take a sputum (mucus/phlegm) sample and run an AFB test to see if the TB bacteria are present.
A positive AFB test means that acid-fast bacteria were found in the sample, which strongly suggests that the person has an active Tuberculosis (TB) infection.
Where does Fertilization take place in Humans?
Learn exactly where fertilization takes place in the human female reproductive system. Understand the role of the fallopian tubes and the ampulla.
Fibroadenoma Meaning in Hindi (Breast Lump)
Learn the meaning of Fibroadenoma in Hindi. Understand that it is a safe, non-cancerous (benign) breast lump commonly found in young women, with zero cancer risk.
Fibrous Root System and Examples
Learn what a fibrous root system is. See common examples of plants with fibrous roots like wheat, grass, and onions.
What are Flame Cells? Function and Examples
Learn about Flame Cells in biology. Understand their crucial role as the microscopic kidney-like excretory system in flatworms (Platyhelminthes) like Planaria.
Fleece Meaning in Biology and Textiles
Learn the exact meaning of Fleece. Understand how the thick, woolly coat of a sheep protects it from the cold and is harvested to make winter clothing.
Turn this guide into revision flashcards, a practice exam, or an AI-generated podcast — free, no signup required.