Tube-ovarian abscess caused by .

is a gram-positive amorphous bacillus and was discovered in the Russian space station 'Mir' in 1997. It shows phylogenetic similarity to , and as determined using 16 s ribosomal RNA gene analysis is classified as a bacteria of the genus It was found to colonise in the human oral cavity, and there are some infectious reports but none specifies gynaecological infection. A 57-year-old woman, who had been continuously using intrauterine contraceptive device, presented with fever and lower abdominal pain. She was suspected tube-ovarian abscess caused by , but the uterine cavity culture revealed infection. Considering surgical treatment, conservative treatment by intravenous benzylpenicillin and subsequently oral ampicillin for 6 months improved the abscess, and she has no recurrence for over 1 year.