Study on Antifungal Activities of Zhexinmycin against Dermatophytes in vitro / 中国药师

Objective:To evaluate in vitro antifungal activities of zhexinmycin against dermatophytes. Methods: The minimum in-hibitory concentration (MIC) and the minimum fungicidal concentration (MFC) of zhexinmycin against 7 strains of dermatophytes were determined by using broth microdilution method according to CLSI M-38A. Results:The MIC of zhexinmycin against dermatophytes was within the range of 0. 125-2. 000μg·ml-1 . The MFC was within the range of 0. 250-4. 000μg·ml-1 . Conclusion:Zhexinmycin shows strong in vitro antifungal effect on multiple fungi such as Epidermophyton floccosum, Trichophyton rubrum, Trichophyton violaceum, Mi-crosporum canis, Trichophyton mentagrophytes, Trichophyton tonsurans and Microsporum gypseum.

rpoB gene mutations in rifampin-resistant Mycobacterium tuberculosis in Zhejiang Province / 中华临床感染病杂志

Objective To characterize rpoB gene mutations in rifampin-resistant Mycobacterium tuberculosis (M.tuberculosis) in Zhejiang Province.Methods A total of 188 clinical isolates of M.tuberculosis from 188 patients with pulmonary tuberculosis in Tongde Hospital of Zhejiang Province and Integrated Chinese and Western Medicine Hospital of Zhejiang Province were collected.Conventional drug resistance analysis was performed and the mutation of rpoB gene was detected by PCR-based DNA sequencing.The association between gene mutations in rifampin-resistance determining region of M.tuberculosis and clinical resistance was analyzed.Results Fifty-seven out of 188 isolates (30.3％) were drug-resistant strains,including 18 isolates (9.6％) with single-resistance to rifampin,28 isolates (14.9％) with single-resistance to other anti-tuberculosis drugs (10 to isoniazid,12 to streptomycin and 6 to ethambutol),and 11 isolates (5.9％) with multi-drug-resistance (rifampin plus one or more drugs of isoniazid,streptomycin and ethambutol).Among 29 rifampin-resistant strains,rpoB gene mutation existed in 27 strains (93.1％),and the most frequently mutated sites were codons 526 (55.6％,16/27),513 (22.2％,5/27),531 (14.8 ％,4/27)) and 529 (7.4％,2/27).Among 28 strains which were resistant to other anti-tuberculosis drugs,rpoB mutations existed in 4 strains (14.3％),and the mutated sites were codons 526 (2 strains) and 513 (2 strains).All 13 sensitive isolates had no mutation in rpoB gene.Conclusion Rifampin resistance in M.tuberculosis is closely correlated with rpoB gene mutations in Zhejiang province,and the most frequent sites of mutation are at codons 526 and 513.

Distribution of Pathogens and Resistance Detection in Urinary Infection / 中华医院感染学杂志

OBJECTIVE To determine distribution of pathogens and resistance characteristic in urinary infection and to provide basis for clinicians to select antibiotics correctly.METHODS A total of 272 strains of pathogens were identified and ESBLs-producing G-bacilli were detected.RESULTS Among 272 strains,68.4% of G-bacilli,19.1% of G+cocci,12.5% of fungi,41.1% of Escherichia coli and 18.2% of Klebsiella pneumoniae strains produced ESBLs.CONCLUSIONS G-bacilli are major pathogens of urinary infection and their resistance is raised.Much attention should be paid to resistance detection.It is important to control nosocomial infection and select antibiotics correctly.