Question

On a urine bacteriology culture blood agar plate at 24 hours, over 100,000 small, white colonies are observed. They are catalase positive and a slide coagulase test is negative. Your next step is to?

-Report over 100,000 Staphy epidermidis/mL of urine
-Perform a Gram stain
-Inoculate a gram-positive urine antibiotic susceptibility battery
-Set up a tube coagulase test
-Ask for a repeat culture

Answer 1

More than 100,000 tiny, white colonies are seen after 24 hours on a pee bacteriology culture blood agar plate. A slide coagulase test comes out negative, and they test positive for catalase. The next step is to perform a Gram stain. The correct option is 1.

Step-by-step explanation:

The next step in this case would be to perform a Gram stain. The Gram stain is a technique used to categorize bacteria based on the chemical composition of their cell walls. It helps distinguish between Gram-positive and Gram-negative bacteria. This step is important because it provides valuable information about the bacteria present in the urine sample. Hence, 1 is the correct option.