According to studies based on bacterial cultures of middle ear fluids , Streptococcus pneumoniae , 27 Haemophilus influenzae and Moraxella catarrhalis

Moraxella catarrhalis: might be more common than expected in acute otitis media in young 1 Finnish children 2 3 Saara Sillanpää (1,2), Sami Oikarinen (3), Markku Sipilä (2), Lenka Kramna (4), Markus 4 Rautiainen (2), Heini Huhtala (5), Janne Aittoniemi (6), Jussi Laranne (2), Heikki Hyöty (3,6), 5 Ondrej Cinek (4) 6 7 (1) Corresponding author, saara.sillanpaa@uta.fi, Department of Anatomy, School of Medicine, 8 University of Tampere, 33520 Tampere, Finland 9 (2) Department of Otorhinolaryngology and Head and Neck Surgery, Tampere University Hospital 10 and School of Medicine, University of Tampere, 33520 Tampere, Finland 11 (3) Department of Virology, School of Medicine, University of Tampere, 33520 Tampere, Finland 12 (4) Department of Pediatrics, 2nd Faculty of Medicine, Charles University in Prague and University 13 Hospital Motol, Prague, Czech Republic 14 (5) School of Health Sciences, University of Tampere, Tampere, Finland 15 (6) Fimlab Laboratories, Pirkanmaa Hospital District, 33520 Tampere, Finland 16 17 18