Bacteriologic study of middle ear infections

Antibiotic resistance in pathogens causing acute otitis media in Finnish children

“…Streptococcus pyogenes used to be the most common pathogen in AOM in the beginning of 20th century, but became less frequent after 1950, as SP became more widespread and the most common pathogen in AOM [9,10] In FinOM cohort study in 1995-1997, the incidence of the three most common pathogens were nearly equal, SP 26%, MC 23% and HI 23%, coagulase-negative Staphylococcus aureus being the most common pathogen (38%) [4]. Another study from the late 1990s showed that SP was the most common (49%) pathogen in children with tympanostomy tubes followed by HI 29% and MC 28% [3].…”

Alloiococcus otitidis in acute otitis media

“…The most marked change in the incidence of AOM pathogens in recent studies is the high percentage of Moraxella catarrhalis-positive MEEs. At present, M. catarrhalis is recovered in up to 23% of MEEs of AOM [3,5].…”

“…Bacteria are cultured in 44-84% of the middle ear effusions (MEE) associated with AOM [1][2][3]. In the first half of the 20th century, Group A beta-haemolytic Streptococcus was the bacterium most frequently found [4], whereas currently it occurs in only 1-3% of the MEEs of AOM [1][2][3]5]. Over the last 50 years Streptococcus pneumoniae has been the bacterium most frequently isolated in MEEs of AOM.…”

“…Over the last 50 years Streptococcus pneumoniae has been the bacterium most frequently isolated in MEEs of AOM. Recent studies in Finland found it in 18-26% of bacterial cultures of AOM [1,5]. The proportion of Haemophilus influenzae culture positive MEEs in AOM has increased over the last two decades, and today it is found almost as often as S. pneumoniae [1,5].…”

“…Recent studies in Finland found it in 18-26% of bacterial cultures of AOM [1,5]. The proportion of Haemophilus influenzae culture positive MEEs in AOM has increased over the last two decades, and today it is found almost as often as S. pneumoniae [1,5]. The most marked change in the incidence of AOM pathogens in recent studies is the high percentage of Moraxella catarrhalis-positive MEEs.…”