Question

multiple choice question

what can be examined in a laboratory to determine the types of bacteria present in a skin infection?

exudate
urine
csf
saliva

Explanation:

Analyze the clinical scenario

The question asks what substance can be examined in a laboratory to identify the types of bacteria causing a skin infection.

Evaluate the options

• Exudate: This is fluid, cells, or other cellular debris that has escaped from blood vessels during inflammatory processes, commonly deposited in tissues or on tissue surfaces (such as pus or fluid from a wound or skin infection). Examining exudate via culture and sensitivity testing is the standard method to identify skin pathogens.
• Urine: This fluid is produced by the kidneys and is used to diagnose urinary tract infections, metabolic conditions, or systemic diseases, not localized skin infections.
• CSF (Cerebrospinal Fluid): This fluid surrounds the brain and spinal cord. It is analyzed to diagnose central nervous system infections like meningitis.
• Saliva: This is watery liquid secreted into the mouth by glands, primarily used to evaluate oral health, systemic hormone levels, or specific viral/bacterial pathogens of the upper respiratory tract.

Determine the correct choice

Since the infection is located on the skin, fluid or pus discharging from the lesion (exudate) is the direct and appropriate specimen for laboratory analysis.

Answer:

• Exudate (Correct answer)
• Urine
• CSF
• Saliva