Abstract
We report a case of sepsis that progressed from an intraabdominal infection of Mycoplasma hominis after Caesarean section in a 31-year-old woman. On hospitalization day 3, the bacteria showed little colony formation in blood agar, chocolate agar, and phenylethyl alcohol (PEA) brucella HK agar media (rabbit). Microscopic examination of a Gram stain of the colony showed no bacteria, but granular particles were observed. However, the bacteria were identified as M. hominis by genetic analysis. An examination of drug sensitivity showed a high minimum inhibitory concentration (MIC) for macrolide antibiotics and low MICs for clindamycin and minocycline. M. hominis has been implicated in gynecologic diseases, including pelvic inflammatory disease. We should consider the involvement of M. hominis in patients who do not respond to beta-lactam or macrolide antibiotics, particularly in cases with little colony formation owing to slow growth and a negative result in Gram staining.
