The catheterized urine from a pregnant 28-year-old female at 26 weeks gestation grows 110 colonies of beta-hemolytic, gray colonies that prove to be catalase negative, PYR negative, and hippurate hydrolysis positive. There is no growth on the MacConkey agar. A 0.001 mL calibrated loop was used to inoculate both agars. This organism should be reported as

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The organism is likely Streptococcus agalactiae (Group B Streptococcus), which is beta-hemolytic, catalase negative, PYR negative, and hippurate hydrolysis positive. The growth of 110 colonies using a 0.001 mL loop translates to >100,000 CFU/mL.

The Catheterized Urine from a Pregnant 28-Year-Old Female at 26