Which virulence factor produced by Pseudomonas aeruginosa is known for its fruity odor?

• A. Exotoxin A
• B. Pyocyanin
• C. Flagella
• D. Endotoxin

Answer: (B)

The fruity odor associated with Pseudomonas aeruginosa is primarily due to the production of pyocyanin, a blue-green pigment that is a notable virulence factor of this bacterium. Pyocyanin contributes to the pathogen's ability to establish infection by generating reactive oxygen species, which can disrupt host cell integrity and immune defenses. The presence of pyocyanin is often utilized as a identifying characteristic in laboratory settings, and its distinct fruity smell is commonly reported by clinicians when they encounter this bacterium in clinical samples. This unique attribute helps in the identification of Pseudomonas aeruginosa, especially in infections such as those seen in cystic fibrosis patients or burn wound infections.