社区获得性肺炎非典型病原体分布及其流行特征

目的 了解社区获得性肺炎(CAP)非典型病原体感染的分布情况及其流行特征.方法 收集确诊为社区获得性肺炎患者278例,间接免疫荧光法(IFA)检测人血清中呼吸道9种主要的非典型性病原体的IgM抗体.结果 病原体检测阳性者150例,总阳性率54.O％.单一病原体感染中,肺炎支原体(MP) 125例(45.0％)、呼吸道合胞病毒( RSV) 27例(9.7％)、腺病毒22例(7.9％)、副流感病毒1、2和3型19例(6.8％)、乙型流感病毒16例(5.8％)、嗜肺军团菌血清1型13例(4.7％)、肺炎衣原体2例(0.7％)和甲型流感病毒1例(0.4％).混合感染共63例(22.7％),其中61例(21.9％)为MP与其他病原体的混合感染,病毒感染以RSV最常见,共27例(9.7％).CAP患者患有基础疾病共139例(50％),其余为无基础疾病者.基础疾病中以循环疾病和呼吸疾病最常见,各占总CAP患者的15,1％和13.0％.所有受检者MP阳性率最高,达45％,其中未成年组3～18岁中MP阳性率高达60.2％,而成人组18 ～50岁中MP阳性率高达81.8％.CAP春季病原体阳性检出率为46.9％,冬季病原体阳性检出率为63.8％(x2=7.752,P＜0.05).结论 非典型性病原体(特别是MP)感染在CAP患者中比例较大,其流行与分布跟病原体种类、基础疾病、年龄、季节等有一定的关系.     

Sensitivity to antibiotics of pneumococci isolated from patients with chronic nonspecific pneumonia and bronchitis

Four hundred and twenty two pneumococcal strains isolated from 300 patients with chronic nonspecific pneumonia and bronchitis were studied with respect to their sensitivity to 18 antibiotics within a period from 1982 to 1985. It was shown with the method of serial dilutions on solid media that 91.7, 87.8, 85 and 81 per cent of the isolates were sensitive to benzylpenicillin, ampicillin, lincomycin and cefuroxime, respectively. A significant percentage of the pneumococcal strains had decreased sensitivity to benzylpenicillin (MIC close to the therapeutic concentration). On this basis it was recommended to use lower concentrations of benzylpenicillin (less than 0.25 units/ml) in assay of sensitivity in clinical strains of Pneumococcus.     

Characteristics of azithromycin action on bacterial biofilms of pneumonia pathogens]

Azithromycin (Zitrolid) action on biofilms formed by gramnegative and grampositive microorganisms, isolated from patients with respiratory tract infections was investigated. The drug was effective at the stage of the biofilm formation and on exposition to the already formed biofilms.     

宁波地区成人社区获得性肺炎病原学调查

目的 研究宁波地区成人社区获得性肺炎病原微生物的分布及其耐药性,为临床合理使用抗菌药物提供必要的病原学依据.方法 对慈溪市红十字医院2010年1月至2011年12月期间住院的233例成年CAP患者临床资料进行回顾性分析.结果 233例CAP患者中,134例病原学检查阳性,病原菌102株,其中主要为流感嗜血杆菌42株,肺炎链球菌36株,肺炎克雷伯杆菌16株.非典型病原阳性32例,主要为肺炎支原体27例.流感嗜血杆菌对氨苄西林耐药率为15.6％;肺炎链球菌对青霉素耐药率为35.1％,对阿齐霉素耐药率为62.4％;肺炎克雷伯菌产超广谱β-内酰胺酶(ESBLs)率为11.8％.结论 宁波地区CAP患者以革兰阴性菌为主要病原菌,对喹诺酮类和第三代头孢菌素具有不同程度的耐药性,可以选择含β-内酰胺酶抑制剂的复合抗生素和碳青酶烯类抗生素.非典型病原体感染的CVP不容忽视.     

Spectrum of pathogens in hospital infections in onco-urologic patients and their sensitivity to antibacterial drugs

Retrospective examination of case records and laboratory findings related to 155 patients discharged from the Urological Department of the All-Union Oncology Research Centre, Academy of Medical Sciences of the USSR within a period of 3 months showed that 41.9 per cent of the oncourological patients had infectious processes requiring antibacterial therapy. Among 80 infectious episodes 62 or 77.5 per cent were of intrahospital origin. There was a relationship of the frequency of the infections to localization of the tumor process, a patient's age, the treatment character and some diagnostic and treatment procedures. 70 per cent of the hospital infections were urinary and 15 per cent referred to suppuration of the operative wounds. The predominant causative agents of the complications were Pseudomonas spp., Klebsiella tribe, Proteus spp. and Enterococci with the highest levels of resistance to antibacterial drugs. The drugs of choice for treating the infections in that group of the patients were ofloxacin and cefotaxime. Aminoglycosides, semisynthetic penicillins, cephalosporins and urological antiseptics were used in accordance with antibioticograms. In the treatment of severe gram-negative infections dioxydin was used. Since hospital infections in oncourological patients are usually caused by hospital multiple resistant strains of microorganisms, often present in associations, the adequate antibacterial therapy requires constant bacteriological surveillance providing not only the choice of the most efficient drug but also early correction of the therapy after the pathogen change.     

Resistance of urinary tract infection pathogens and choice of antibacterial therapy in pediatric urologic practice]

The data on antibiotic resistance of the main uropathogens isolated from patients with urinary tract infection in an urologic department (319 isolates) and outpatient and diagnostic units (360 isolates) are presented. It was shown that by the antibiotic resistance the Escherichia coli isolates from the urologic department patients and outpatients did not practically differ: 44.1 and 47.8% of the isolates were resistant to ampicillin, 26.7 and 23.4% were resistant to amoxycillin/clavulanate, 28.9 and 24.9% were resistant to co-trimoxazole and 26.5% was resistance to cefuroxime (outpatients). The basic differences referred to Pseudomonas aeruginosa: resistance to ceftazidime in 38.5% of the isolates and resistance to gentamicin in 36.2% of the isolates. The activity against P. aeruginosa could be arranged as follows in the decreasing order: amikacin = meropenem > imipenem > cefepime = cefoperazone/sulbactam > gentamicin = ceftazidime. Resistance of P. aeruginosa to fluoroquinolones (ciprofloxacin and levofloxacin) remained low (7.4 and 8.0% respectively). No ampicillin resistance was revealed in the isolates of Enterococcus faecalis.     

Antibiotic sensitivity of pneumonia pathogens in newborns and problems of antibacterial therapy of the pathologic process]

The results of the bacteriological investigation of the secretion from the trachea, large bronchi and fauces of 36 newborns (including 27 preterms) with severe pneumonia were analyzed. 20 of them were born of women with complicating somatic, obstetric and gynecologic histories: candidiasis, herpes genitalis, chronic endometritis, adnexitis or chronic pyelonephritis that could be the risk of the fetus intranatal infection. During the acute period of pneumonia in the newborns within the first 4-8 days of life mainly Pseudomonas aeruginosa was isolated (51.3 per cent), Staphylococcus epidermidis, S. haemolyticus and Enterococcus faecalis were less frequent (18.9, 8.1 and 5.4 per cent, respectively). Klebsiella pneumoniae, Streptococcus anhaemolyticus and other organisms were extremely rare. On the whole the gramnegative microflora predominated. The study of the antibiotic susceptibility showed that the majority of the P. aeruginosa isolates were susceptible to amikacin and polymyxin B, the isolates susceptible to ceftazidime were less frequent, 20-25 per cent of the isolates were susceptible to ciprofloxacin, cefoperazone and imipenem and practically no isolates were susceptible to gentamicin. The S.epidermidis isolates were susceptible to rifampicin and vancomycin and in rare cases to fusidin and amikacin and resistant to oxacillin. When the treatment course was more than 15 days, the isolates proved to be susceptible to 1/3 of the presently available antibiotics. Because of the host low protective forces, peculiarities of the infection pathways and high frequency of the resistant strains it is valid to include netilmicin, imipenem, cefoperazone and ceftriaxone to the complex therapy of the newborns along with the substitution immunotherapy.     

178例小儿肺炎分离菌分布和耐药性分析

目的 了解小儿肺炎病原菌谱及耐药性。方法 对2003～2004年178例小儿肺炎的痰标本进行细菌学培养,测定药物敏感性。结果 分离菌中,以革兰阴性菌居首位．占58．51％。肺炎克雷伯菌和大肠埃希菌为主琴芦种,对亚胺培南、美罗培南的耐药性最低;其次为革兰阳性菌,占40．43％,以金黄色葡萄球菌为主,耐甲氧西林的葡萄球菌为57．1％,对万古霉素、替考拉宁最敏感。结论 小儿肺炎病原菌以革兰阴性菌为主,并且出现多重耐药。临床上应避免盲目经验性用药,减少或减缓细菌耐药的发生。     

Results of utilization of intermittent normobaric hypoxia in patients with bronchial asthma and chronic obstructive bronchitis]

The results of intermittent normobaric hypoxytherapy in 42 patients with bronchial asthma (BA) and 14 patients with chronic obstructive bronchitis (COB) are analyzed. The positive effect is obtained in 76% of patients with BA and 92.8% of patients with COB. In the group of patients with BA the best effect was achieved for atopic form of BA--in 90% of patients, the effect was less pronounced for infection-allergic form--in 73.9% and for mixed form of BA--in 66.7%. In the process of treatment the attacks of asphyxia disappeared or became more occasional in 60.7% of patients; in 32.1% the attacks were more easily arrested or stopped independently; 33.8% of patients decreased doses of constantly taken drugs; in 33% cough ceased or decreased, sputum became to expectorate better; in 41% of patients dyspnea disappeared and considerably decreased. Improvement of the state in 54% of patients was retained for one year and more, in 29%--for 6 months, in 16.6%--for 3-4 months. The course of treatment consisted of 20-25 sessions. The patients breathed in hypoxic gas mixture containing 10% of oxygen (HGM-10) under intermittent conditions alternating with respiration of free air.     

Etiology of acute bronchitis in adults

A total of 126 adult patients with acute bronchitis were subjected to microbiological, virological and immunological examination. Influenza and other acute respiratory viral infections were detected in 104 (82.5%) cases of acute bronchitis. The results of microbiological examination and the study of local and systemic immunity showed that in 94.4 +/- 2.6% of the patients the development of acute bronchitis was linked with the appearance of acute pneumococcal infection irrespective of the presence, or absence, of virologically and serologically confirmed acute viral or mycoplasmal infections.     

Disturbances of coagulation and fibrinolysis in patients with acute leukemia]

In 30 patients with acute leukemia--18 with myeloblastic acute leukemia, 1 with promyelocytic acute leukemia, 4 with myelo-monocytic acute leukemia, 4 with chronic myelocytic leukemia exacerbation--coagulation and fibrinolysis tests were performed in different stage of the disease. Most of the disorders were noted in the III period of the disease (significant levels of the factors II, IX decrease, clot contractility weakness and platelets count decrease). I in patients with manifestation of haemorrhagic diathesis and in patients without them disturbances in examined tests were similar, but platelets count in patients with bleeding was always significantly reduced. The main reasons of the bleeding in acute leukemias are thrombocytopenia together with the in coagulation factors.