Antibiotic resistance of pediatric isolatesof Streptococcus pneumoniae in a Saudi Arabianhospital from 1999 to 2004

摘要

Background: This study describes the resistance pattern of [i]Streptococcus pneumoniae[/i] isolates obtained from pediatric patients in a Saudi Arabian hospital.Material/Methods: This is a retrospective analysis of the antibiotic resistance of [i]S. pneumoniae[/i] isolates (n=141) obtained from children in a Saudi Arabian hospital 1999–2004. Clinical data and antibiotic sensitivity were retrieved from microbiology data and analyzed.Results: Of the total isolates of [i]S. pneumoniae[/i], 57.6% were susceptible to penicillin, 28.8% intermediately susceptible, and 13.7% were resistant organisms. Over the study period, high-level penicillin resistance of [i]S. pneumoniae[/i] was 0% in 1999, 23% in 2001, and 3.4% in 2004. Intermediate penicillin resistance was 21% in 1999, 41% in 2001, and 27.6% in 2004. The resistance rates to other antibiotics were as follows: erythromycin 33.4%, tetracycline 30%, trimethoprim sulfamethoxazole 40%, and clindamycin 21.6%. Children less than 2 years of age showed a higher rate of intermediately penicillin-susceptible isolates (41.9% versus 22.7%, [i]P[/i]=0.0.02). They also had higher rates of resistance to tetracycline (42.4% versus 25%, [i]P[/i]=0.03), trimethoprim-sulfamethoxazole (54% versus 33.8%, [i]P[/i]=0.02), and clindamycin (33% versus 17%, [i]P[/i]=0.04). All tested isolates were susceptibility to ceftriaxone and vancomycin.Conclusions: The overall high-level penicillin resistance of [i]S. pneumonaie[/i] from 1999–2004 was 13.7%. The percentage of intermediately penicillin-susceptible organisms was higher in the age group under 2 years of age (41.9%) than in patients 2 years of age or older (22.7%).