The case reported involves a 31-year-old gravida III para II at 20 + 2 weeks estimated gestational age. The patient presented with fever, malaise and a shortened cervix uteri. Cultures from blood and cervix uteri grew non-typeable Haemophilus influenzae and intravenous cefuroxim 1,5 g x 3 was initiated. Later the same day the patient spontaneously aborted a dead foetus. We discuss the case, the laboratory requirements for detection of H. influenzae and the importance of paying attention to febrilia in pregnancy.