Which item describes tissue culture transport correctly?

• A. Wrapped in a sterile swab, moistened with sterile saline and placed in a sterile plain tube.
• B. Placed on ice without container
• C. Left dry in a paper envelope
• D. Placed in formalin and sealed in a plastic bag

Answer: (C)

Transporting tissue culture samples requires preserving viability and avoiding contamination. Leaving the tissue dry in a paper envelope keeps the specimen in a non-fixed, moisture-controlled state and minimizes the risk of leaking liquids or introducing substances that could interfere with culture. The other options introduce factors that compromise culture: a moist swab in a sterile tube adds liquid that can dilute the sample and promote unwanted growth or contamination; placing tissue on ice without a proper container risks leakage and exposure; and using formalin fixes the tissue, making culture impossible.