Final answer:
The primary test performed in the microbiology section of the lab is the Gram stain.
Step-by-step explanation:
The primary test performed in the microbiology section of the lab is the Gram stain.
The Gram stain is a technique commonly used to differentiate between two different types of bacteria - gram-positive and gram-negative. It involves staining bacterial cells and then visually examining them under a microscope. About 80% of patients with bacterial meningitis will show bacteria in their cerebrospinal fluid (CSF) with a Gram stain.
Other tests, such as biochemical tests, DNA/RNA analysis, and serological testing methods, can also be used to identify bacteria, but the Gram stain is typically the first step in the identification process.