OBJECTIVETo investigate the antibiotic resistance and risky factors of nosocomial infections caused by Stenotrophomonas maltophilia, so as to help elucidate the difference of drug resistance between metallic beta-lactamase (MBL) producing and non-MBL producing strains.

METHODSStandard agar dilution method of NCCLS was employed in the isolation of 36 strains of Stenotrophomonas maltophilia from patients with nosocomial infection with respect to their in vitro antibiotic resistance to 18 kinds of antibiotics. MBL strains were identified by MBL-E test method.

RESULTSStenotrophomonas maltophilia in our hospital was mainly identified in the lower respiratory tract (88.9%), in which 88.2% (30/34) of the patients had serious original diseases, 50% of whom had received Imipenem/cilastatin sodium treatment. Thirty-six strains of Stenotrophomonas maltophilia were susceptible to new types of fluoquinolone antibiotics, i.e. Sparfloxacin, levofloxacin, gatifloxacin and doxycycline, with inhibitory rate ranging 97.2%, 94.4%, 91.7% to 83.3%, respectively. They could also be inhibited by SMZ/TMP and Ticarcillin/Lavulanic acid with inhibitory rate of 63.9% and 58.3%, respectively. There were 16 strains out of 36 of MBL bacteria with complete resistance to Imipenem/cilastatin sodium, but with higher susceptibility to aztreonam than those non-MBL producing strains.

CONCLUSIONThe nosocomial infection in our hospital caused by Stenotrophomonas maltophilia seemed to be related with severe primary disease and the use of Imipenem/cilastatin sodium. The newly developed fluoroquinolones possessed powerful antibacterial potency on Stenotrophomonas maltophilia found in nosocomial infection.

Antibiosis ; drug effects ; Cilastatin ; therapeutic use ; Cross Infection ; drug therapy ; microbiology ; Drug Resistance, Bacterial ; drug effects ; Fluoroquinolones ; therapeutic use ; Humans ; Imipenem ; therapeutic use ; Microbial Sensitivity Tests ; Risk Factors ; Stenotrophomonas maltophilia ; drug effects

OBJECTIVETo study the clinical features and the incidence of early infectious complications following children hematopoietic stem cells transplantation (HSCT).

METHODSThe clinical data of 29 cases with early infectious complications following HSCT was retrospectively analyzed.

RESULTSThe incidence of early infectious complications following HSCT in 31 children (including 22 cord blood transplantation and 9 peripheral blood stem cells transplantation) was 94% (29/31). The first occurrence of the early infectious complications was at a median of 6 (0 - 22) days, the peak time of incidence was at a median of 4 - 7 days post transplantation. The duration of the first early infectious complications was at a median of 9 (3 - 20) days. The occurrence of the second early infectious complications was at a median of 19 (13 - 27) days. For all of the 29 children, when they developed early infectious complications their absolute neutrophil counts (ANC) were all > 0.5 x 10(9)/L. The most common infectious sites were the digestive tract (oral and gastro-intestinal mucositis) and then the respiratory tract. Gram negative blood infections were quite frequent and Pseudomonas aeruginosa was common in the oral-pharynx discharge cultures. Two children had Mycoplasma pneumonia infections and there were 4 incidences with fever but no definite infectious foci. The incidence and duration of early infectious complications following hematopoietic stem cells transplantation were associated with the duration of neutropenia. The source and the MNCs dose of the graft, the difference of conditioning regimen and GVHD prophylaxis method did not have a significant impact on the incidence and duration of early infectious complications. Antibiotic prophylaxis (including Tienam) could delay the occurrence of the early infections significantly.

CONCLUSIONThe incidence and duration of early infectious complications following hematopoietic stem cells transplantation were directly associated with the duration of neutropenia. Tienam regimen could postpone the early infections incidence and had effect of preventing the early infectious complications.

Adolescent ; Antibiotic Prophylaxis ; Child ; Child, Preschool ; China ; epidemiology ; Cilastatin ; therapeutic use ; Drug Combinations ; Female ; Hematopoietic Stem Cell Transplantation ; adverse effects ; Humans ; Imipenem ; therapeutic use ; Incidence ; Infection ; drug therapy ; epidemiology ; etiology ; Leukemia ; therapy ; Male ; Retrospective Studies ; Time Factors

The treatment of infectious complications in cancer patients has evolved as a consequence of the developments in the chemotherapy of cancer patients. In this prospective, randomized study, we compared imipenem-cilastatin and sulbactam-cefoperazone with amikacin in the empiric therapy of febrile neutropenic (< 1000/mm3) patients with liquids and solid tumours. Of 30 evaluable episodes, 15 were treated with imipenem-cilastatin and 15 were treated with sulbactam-cefoperazone plus amikacin. 73% of episodes were culture-positive: gram-positive pathogens accounted for 62% of the isolates. Bacteremia was the most frequent site of infection. The initial clinical response rate for both regimens was 60% (p > 0.05). No major adverse effects occurred. This study demonstrated that imipenem-cilastatin monotherapy and combination therapy of sulbactam-cefoperazone plus amikacin were equally effective empiric therapy for febrile granulocytopenic cancer patients.
Adolescence ; Adult ; Aged ; Aged, 80 and over ; Amikacin/therapeutic use ; Antibiotics, Combined/therapeutic use* ; Bacteremia/drug therapy ; Bacteremia/complications ; Cefoperazone/therapeutic use ; Cilastatin/therapeutic use ; Female ; Fever/drug therapy* ; Fever/complications ; Human ; Imipenem/therapeutic use ; Male ; Middle Age ; Neoplasms/drug therapy* ; Neoplasms/complications ; Neutropenia/drug therapy* ; Neutropenia/complications ; Prospective Studies ; Sulbactam/therapeutic use

Multiple antibiotic reisistance threatens successful treatment of Acinetobacter baumannii infections worldwide. Increasing interest in the well-known activity of sulbactam against the genus Acinetobacter has been aroused. The purpose of this study was to compare the outcomes for patients with Acinetobacter bacteremia treated with cefoperazone/sulbactam versus imipenem/cilastatin. Forty-seven patients with Acinetobacter baumannii bacteremia were analyzed through a retrospective review of their medical records for antibiotic therapy and clinical outcome. Thirty-five patients were treated with cefoperazone/sulbactam, and twelve patients with imipenem/ cilastatin. The percentage of favorable response after 72 hours was not statistically different between cefoperazone/ sulbactam group and imipenem/ cilastatin group. The mortality rate was not statistically different, too. Cefoperazone/sulbactam was found to be as useful as imipenem/cilastatin for treating patients with Acinetobacter bacteremia.
Sulbactam/*therapeutic use ; Protease Inhibitors/therapeutic use ; Middle Aged ; Male ; Imipenem/therapeutic use ; Humans ; Female ; Drug Therapy, Combination ; Drug Resistance, Bacterial ; Cilastatin/therapeutic use ; Cefoperazone/*therapeutic use ; Bacteremia/*drug therapy ; Anti-Bacterial Agents/*therapeutic use ; Aged ; Adult ; Adolescent ; Acinetobacter Infections/*drug therapy/mortality ; Acinetobacter/drug effects/isolation & purification

No abstract available.
Aged ; Anti-Bacterial Agents/pharmacology/therapeutic use ; Asian Continental Ancestry Group ; Bacterial Proteins/genetics/*metabolism ; China ; Cilastatin/therapeutic use ; Citrobacter freundii/drug effects/*enzymology/isolation & purification ; Drug Combinations ; Drug Resistance, Multiple, Bacterial ; Humans ; Imipenem/therapeutic use ; Male ; Microbial Sensitivity Tests ; Plasmids/*metabolism ; Respiratory Tract Infections/*diagnosis/drug therapy/microbiology ; beta-Lactamases/genetics/*metabolism

OBJECTIVETo evaluate the efficacy and safety of meropenem in Chinese patients, we conducted a study for the treatment of patients with lower respiratory tract infections, urinary tract infections and other infections.

METHODSA total of 182 hospitalized patients were enrolled in the study. 90 patients received 500 mg meropenem every 12 hours (or 1 g every 12 hours if necessary) and 92 patients received imipenem/cilastatin 500 mg/500 mg every 12 hours (or 1 g every 12 hours if necessary) by intravenous infusion. The duration of treatment was 7 - 14 days for both groups.

RESULTSSeventy of 90 cases receiving meropenem and 70 of 92 cases receiving imipenem/cilastatin were assessable for clinical efficacy. The overall efficacy rates were 90% for the meropenem group and 87% for the imipenem/cilastatin group, and the bacterial eradication rates were 86% in both groups. 93 (76%) of 123 strains isolated from patients produced beta-lactamases. Adverse drug reactions were evaluated in 72 cases in the meropenem group and 70 cases in the imipenem/cilastatin group. The adverse drug reaction rates were 9.7% and 8.6%, respectively. The results showed that there were no statistical differences between these two groups (P > 0.05).

CONCLUSIONMeropenem is effective and safe for the treatment of bacterial infections caused mainly by beta-lactamase-producing strains.

Adult ; Aged ; Alanine Transaminase ; blood ; Aspartate Aminotransferases ; blood ; Cilastatin ; administration & dosage ; adverse effects ; therapeutic use ; Female ; Humans ; Imipenem ; administration & dosage ; adverse effects ; therapeutic use ; Male ; Middle Aged ; Respiratory Tract Infections ; drug therapy ; Thienamycins ; adverse effects ; therapeutic use ; Urinary Tract Infections ; drug therapy