The bacterial distribution and drug sensitivity test of lower respiratory tract infection in respiratory medicine

Objective To analysis the bacterial distribution and drug sensitivity test results of lower respiratory tract infection in respiratory medicine.Methods In 2009 and 2010,the sputum specimens of patients with lower respiratory tract infection were selected.The infection-causing bacteria were classified.Analysis the rug sensitivity test results and observe the bacterial distribution and the change of drug susceptibility.Results The gram negative bacteria was still the main infection flora and the proportion of gram-positive bacteria and fungi improved.The drug resistance of staphylococcus aureus to penicillin was higher,and the drug resistance of staphylococcus aureus to oxacillin was higher too,but it only had the higher susceptibility to vancomycin.The drug resistance pseudomonas aeruginosa to broad-spectrum increased greatly,but the sensitivity of which to imipenem,piperacillin and tazobactam decreased.Conclusion The incidence of lower respiratory tract infection is higher with more nosocomial infection.The gram-negative bacilli is more common,followed by Gram-positive bacteria and fungi.Selecting sensitive antibiotics according to drug sensitivity test can help to shorten the hospitalization time,improve clinical curative effect and reduce infection rate.