Which microorganism would most likely display a characteristic swarming growth pattern on an agar plate?

• A. Candida albicans
• B. Staphylococcus aureus
• C. Escherichia coli
• D. Proteus mirabilis

Answer: (D)

Verified step by step guidance

1. Understand what swarming growth means: it is a rapid and coordinated movement of bacterial populations across solid surfaces, often seen as concentric rings or spreading patterns on agar plates.
2. Recall that swarming motility is typically associated with certain flagellated bacteria that can move collectively, which helps them colonize surfaces efficiently.
3. Evaluate the given microorganisms: Candida albicans is a fungus, Staphylococcus aureus is a non-motile bacterium, Escherichia coli can be motile but does not typically show swarming, and Proteus mirabilis is well-known for its characteristic swarming behavior.
4. Identify that Proteus mirabilis produces flagella and secretes surfactants that facilitate swarming, making it the microorganism most likely to display this growth pattern on agar.
5. Conclude that the presence of swarming growth on an agar plate is a distinctive feature of Proteus mirabilis among the options provided.