title: Comparison of concentrations of amoxicillin and ampicillin in serum and middle ear fluid of children with chronic otitis media.
abstract: Twenty-eight children aged five to nine years with chronic serous otitis media received a single dose of either ampicillin or amoxicillin by the oral route 1-2 hr before the removal of middle ear fluid by ventilation tubes inserted through the tympanic membrane. At the time middle ear fluid was obtained, a sample of blood was drawn from the patient, and levels of antibiotic in both specimens were microbiologically assayed by a disk diffusion method. Levels of amoxicillin (mean+/-standard error [SE], 1.48+/-1.6 microng/ml) in middle ear fluid were consistently and significantly higher (P less than 0.05) than levels of ampicillin (mean+/-SE, 6.2+/-5.0 microng/ml).
mesh_terms: D000284:Administration, Oral; D000658:Amoxicillin / Q000097:blood / Q000378:metabolism* / Q000627:therapeutic use; D000667:Ampicillin / Q000031:analogs & derivatives* / Q000097:blood / Q000378:metabolism* / Q000627:therapeutic use; D002648:Child; D002908:Chronic Disease; D005122:Exudates and Transudates / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D010033:Otitis Media / Q000188:drug therapy / Q000378:metabolism*
chemical_list: D000667:Ampicillin; D000658:Amoxicillin