Which of the following is included in specimen-collection guidelines in microbiology?

• A. Store all specimens at room temperature for 24 hours before processing
• B. Label specimens only with the patient's initials
• C. Collect specimens before starting antimicrobial therapy
• D. Use the same swab for multiple body sites

Answer: (C)

Verified step by step guidance

1. Understand the importance of specimen collection in microbiology: Proper collection ensures the accuracy of diagnostic tests by preserving the viability of microorganisms and preventing contamination.
2. Review common specimen-collection guidelines, which typically include collecting specimens before starting antimicrobial therapy to avoid suppressing microbial growth and affecting test results.
3. Recognize that storing specimens at room temperature for 24 hours is generally discouraged because it can lead to overgrowth or death of certain microbes, affecting the accuracy of culture results.
4. Note that labeling specimens only with the patient's initials is insufficient; full patient identification is necessary to avoid mix-ups and ensure proper diagnosis and treatment.
5. Avoid using the same swab for multiple body sites to prevent cross-contamination between different microbial populations, which could lead to misleading results.