1 MCQs in Microbiology for NEET PG
A 45-year-old man with cirrhosis and ascites presents with spontaneous bacterial peritonitis (SBP). Ascitic fluid culture grows a gram-negative rod that ferments lactose, produces indole, and is methyl red positive but Voges-Proskauer negative. The organism is resistant to ampicillin but susceptible to third-generation cephalosporins. Which of the following additional findings would MOST reliably differentiate this isolate from Klebsiella pneumoniae in the clinical laboratory?
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