Civil Services Prep

Prelims 2022 · Science and Technology · Question 37

Consider the following statements:

  1. Biofilms can form on medical implants within human tissues.
  2. Biofilms can form on food and food processing surfaces.
  3. Biofilms can exhibit antibiotic resistance.

Which of the statements given above are correct?

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Answer

1, 2 and 3

1. Biofilms can form on medical implants within human tissues. — Correct. Biofilms commonly develop on implanted devices like catheters, prosthetic joints and heart valves, causing persistent infections.

2. Biofilms can form on food and food processing surfaces. — Correct. They readily form on food-contact surfaces such as stainless steel, pipes and conveyors in processing units, leading to contamination risks.

3. Biofilms can exhibit antibiotic resistance. — Correct. Microbes in biofilms are protected by an extracellular matrix and altered physiology, making them much more resistant to antibiotics and disinfectants.

Therefore, all three statements are correct.

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