Distribution and Drug Resistance of Pathogens in Respiratory Tract in Children

OBJECTIVE To investigate pathogenic bacteria isolated from children with respiratory tract infection(RTI) and bacterial resistance to commonly used antimicrobial agents in Guilin area,so as to instruct the rational use of antibiotics.METHODS Routine methods were used to isolate and identify bacteria species and samples of sputum or throat swabs were collected from children with respiratory infection in inpatient departments.The drug susceptibility tests were performed by Kirby-Bauer method.RESULTS Total 733 strains of bacteria were isolated.The Haemophilus influenzae(HI) was the most common(165 strains),followed by Escherichia coli(136 strains) and Streptococcus pyogenes(51 strains).The resistance of HI to trimetoprim-sulfa methoxazole and ampicillin was 59.39% and 36.36%,respectively.Cephalosporins and quinolones were more sensitive to HI.Imipenem,quinolones and amikacin were more sensitive to E.coli as yet.The resistant rate of Streptococcus to penicillin-G,erythromycin,clindamycin and trimetoprim-sulfa methoxazole was 56.79-69.63%.CONCLUSIONS Gram-negative bacilli are the main pathogenic bacteria in childrens respiratory tract infection.The drug resistance is conspicuous.Antibiotics for treating RTI should be selected based on pathogenic bacteria variance and the drug susceptibility test.