Fig. 1

a Fractures of left femoral neck under X-ray at admission. b Prosthetic hip in right position (2 h after hip replacement under X-ray). c Redness and swelling around surgical site, wound fluctuation in palpation (8 days after surgery). d Recovered after anti- M. hominis treatment with the combination of moxifloxacin, and doxycycline (18 days after surgery). e After 7 day of incubation of subcutaneous fluid collected during debridement on blood agar at 37 °C in a 5% CO₂ atmosphere, tiny, nonhemolytic, transparent colonies grew on Columbia blood agar plate. f Fried-egg-type colonies of Mycoplasma hominis on solid media 5 days after subculture