Lactococcus garvieae are Gram-positive, facultative anaerobe cocci. The bacterium is a known pathogen in fish, but is also described in mastitis among ruminants. In recent years it has been found in a Danish fish farm. Only 15 cases documenting infection in humans are found in English literature. We present an 83 year-old female in antihypertensive treatment admitted to hospital because of hypothermia and sepsis. In two of two blood cultures L. garvieae were found. No infection site was found. The patient received ampicillin and ciprofloxacin and was discharged to her home after 18 days.