Comamonas testosteroni has rarely been implicated as a
human pathogen. We here present a case of
peritonitis due to this organism in a
patient on
continuous ambulatory peritoneal dialysis (
CAPD). A 32-year-old
woman was admitted with
abdominal pain and cloudy peritoneal effluent. Empirical intraperitoneal (IP)
treatment with
cefazolin and
ceftazidime was started. The
culture was positive for C. testosteroni and
antibiotic was changed to
ceftazidime IP. Four days after the
ceftazidime treatment, the
patient became asymptomatic. The follow-up
culture from peritoneal effluent at 7th day was negative. This
treatment was maintained for 21 days. After that,
culture negative
peritonitis occurred twice for 2 months in this
patient, so
CAPD catheter had to be removed. This is the first reported case of
CAPD peritonitis caused by C. testosteroni. It is important for clinicians to recognize that
CAPD peritonitis is caused by this organism which has been largely overlooked as a potential pathogen.