Recurrent or persistent acute otitis media (rAOM) and acute otitis media treatment failure are commonly encountered in the pediatric population. The is mounting evidence to suggest that rAOM is associated with multidrug antibiotic resistance. However, there has yet to be any study on mul tidrug antibiotic resistance in rAOM patients in Saga prefecture in Japan. This retrospective study was undertaken to elucidate the inhibitory activity with 70 rAOM pediatric patients from whom bac terial cultures were obtained from middle ear effusion, otorrhea, or the nasopharynx from January 2002 to September 2004. All bacterial cultures studies were performed for rAOM pediatric patients after the initial failure of the first-line antibacterial therapy. All children presented with acute oti tis media (AOM) associated with recurrent episodes after oral medicen therapy. We also investi gated the effect of tympanostomy tube placement in six rAOM patients. The pathogens in rAOM are
Haemophilus influenzae (n=26, 37.1%),
Streptococcus pneumoniae (n=25, 35.7%),
Staphylococcus aureus (n=11, including 10 MRSA, 15.7%), and others. These pathogens were also not susceptible to penicillin. In children with
H influenzae (n=26), three of 26 cases were highly resistant to penicillin (β-lactamase non-procucing ABPC resistant
Haemophilus influemzae, BLNAR), and 12 cases showed in termediate resistance (low-BLNAR), while one case was BLPAR (β-lactamase positive ampicillin resistant). In children with
S peneumoniae (n=25), 10 of 25 were highly resistant to penicillin (penicillin-resistant Streptococcus pneumoniae, PRSP) while 13 cases showed intermediate resistance (PISP). All 70 children received either AMPC (40m-80mg/kg per day), CFPN-I (9-15mg/kg per day) or CFTM-PI (15mg/kg per day) after the initial failure of first-line antibacterial therapy. All rAOM patients received nasal therapies and antibiotic treatments based on the results of suscep tibility testing. Myringotomies were performed in all severe cases. The patients caused by mul tidrug antibiotic resistance microbes such as MRSA or DRSP (drug-resistant
S. pneumoniae), treated with myringotomies, syringing and suctioning to clear the discharge without using antibiotics. Sixty-four of 70 (91%) patients could thus be controlled by these medical therapies. The remaining unsuccessful six children (9%) underwent tympanostomy tube placement. The ages of all six children were younger than 2 years. The use of such tubes reduced the frequency of recurrent acute oti tis media in all of the patients. Thereafter all of them could be successfully controlled by surgery. The data suggest that the placement of the tympanostomy tubes therefore appears to be a highly use ful option for rAOM pediatric patients.
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