1. Which of the following microorganisms is most likely to be found in a patient with a catheter-associated urinary tract infection? A. Escherichia coli B. Staphylococcus aureus C. Pseudomonas aeruginosa D. Candida albicans Answer: A. Escherichia coli Rationale: Escherichia coli is the most common cause of urinary tract infections, including those associated with catheters, due to its prevalence in the gut flora and its ability to adhere to uroepithelial cells. 2. In the context of microbiology, what does the term 'nosocomial infection' refer to? A. An infection acquired in a community setting B. An infection acquired in a hospital setting C. A genetic infection D. A chronic infection Answer: B. An infection a