objective:to investigate the pathogens distribution and resistance of lower respiratory tract infection of elder patients , and the predisposing factor for the infection.
目的：了解老年人医院获得性下呼吸道感染的病原菌分布，耐药情况及易感因素。
methods a randomized controlled study was conducted in patients with lower respiratory tract infection (lrti), urinary tract infection (uti), peritonitis, hepato biliary infection and septicemia.
方法以头孢他啶为对照药，在下呼吸道感染、腹腔、胆道感染、败血癥中进行随机对照观察。
objective: to analyse the clinical characteristics of lower respiratory tract infection caused by pseudomonas aeruginosa(pa) and to investigate the antibiotic sensitivity of pa strains.
目的：分析和总结铜绿假单胞菌下呼吸道感染的临床特点及抗生素敏感性的分布情况。
conclusion the lower respiratory tract infection in our hospital is mainly gram-negative bacilli, and to common antibiotics has a higher resistance rate.
结论我院下呼吸道感染以革兰阴性桿菌为主，且对常用抗生素有较高的耐药率。
consider this infection in patients with a lower respiratory tract infection who have traveled to or had contact with someone who traveled to the above regions in the past 10 days.
对于一个在10天内到过上述地区或与到过上述地区的人有过接触并患有下呼吸道感染的病人要考虑到有这一感染的可能。
objective:to acquaint pathogens distribution of lower respiratory tract infection and present conditions of the common pathogensdrug-resistance.
目的：了解下呼吸道感染病原菌分布及常见致病菌的耐药现状。
conclusions: the occurrence and the progress of lower respiratory tract infection in aged people are related to disorder of cellular immunity.
结论：老年人下呼吸道感染的发生、发展与机体的细胞免疫功能紊乱有关。
methods 68 cases with lower respiratory tract infection were randomly divided into sequential therapy group and control group with gatifloxacin intravenously.
方法68例下呼吸道感染者随机分为序贯治疗组和静脉给药对照组进行治疗。
objective to study the epidemiological features of hospital lower respiratory tract infection in order to adopt effective control methods.
目的探讨医院下呼吸道感染流行病学特点，以便采取有效的控制措施。
result after the filter used, the rate of nosocomial lower respiratory tract infection is reduced obviously, and breathing circuit almost have no bacteria colonized.
结果使用生物过滤器后医院下呼吸道感染发生率显着下降，呼吸回路螺纹管内几乎无细菌寄居。
objective to investigate the distrubution of pathogenic bacteria in lower respiratory tract infection in hospital.
目的了解医院下呼吸道感染患者临床分离病原菌的分布情况。
conclusion: azithromycin is an effective agent in the treatment of the acquired lower respiratory tract infection and urogenital tract infection with slight adverse reaction.
结论：阿奇霉素是治疗院外获得性呼吸道与泌尿生殖道感染的有效和安全的药物。
objectiveto evaluate the distributions and drug resistance of the pathogenic bacteria causing lower respiratory tract infection in patients with malignant tumor.
目的探讨我院肿瘤科恶性肿瘤继发下呼吸道感染病原菌的分布及耐药性。
objective to understand in hospital the distribution of lower respiratory tract infection of pathogens and drug resistance for clinical basis for rational use of antimicrobial agents.
目的了解我院下呼吸道感染病原菌的分布及耐药情况，为临床合理应用抗菌药物提供依据。
objective to investigate the pathogens and prognosis of nosocomial lower respiratory tract infection (nlrti).
目的了解医院下呼吸道感染（nlrti）的病原菌和预后特点。
objective to investigate the clinical characteristic of 52 patients with lower respiratory tract infection by acinetobacter and their drug-resistance analysis.
目的了解下呼吸道不动桿菌感染的临床特征及耐药分析。
conclusion (1) klebsiella pneumoniae and pseudomonas aerugries were the main pathogens in lower respiratory tract infection in hospital.
结论（1）克雷伯菌属及铜绿假单胞菌构成院内下呼吸道感染主要致病菌。
the lower respiratory tract infection was the most common site(48.68% ), the second was urinary tract (25%).
感染部位以下呼吸道最多（占48.68%），其次为泌尿系统（占25%）；