Résumé
OBJECTIVE To understand mecA gene distribution in Staphylococcus aureus and its role in antibiotics-resistance.METHODS In this study,a total of 47 S.aureus strains were isolated from hospitalized patients.Agar disk diffusion test was conducted to determine the resistance of S.aureus to antibiotics.The DNA of these strains were extracted and purified.The mecA gene was tested by PCR and the relation between the mecA gene and antibiotics-resistance was analyzed.RESULTS Of 47 strains,33(70.2%) were MRSA.Of 33 MRSA,only 3 strains were susceptible to glycopeptides antibiotics.Only 2 strains(14.3%) of 14 MSSA were susceptible to all of the 12 antibotics.The results of PCR revealed that 32 out of 33 MRSA(97.0%) carried mecA in their genome.One strain was mecA gene negative.Among 14 MSSA,3(21.4%)strains carried mecA gene.CONCLUSIONS The isolation rate of MRSA in S.aureus is high.The resistance to antibiotics of MRSA is popular Glycopeptides antibiotics.Most of MRSA carry mecA gene,which plays an important role in antibiotics-resistance.Fewer MSSA carry mecA gene.
Résumé
OBJECTIVE To investigate the distribution and tendency towards drug resistance of Candida albicans which causing clinical deep infection and to supply data to clinical treatment. METHODS The distribution and tendency towards drug resistance of C. albicans isolates from infected patients from Jan 2007 to Dec 2007 were analyzed retrospectively.RESULTS All 1698 strains of Candida were isolated from patients sputum,urine,blood,secretion,etc. From 1075 cases with C. albicans,965(89.8%) strains were isolated from sputum. The resistance rate to nyststin,fluconazole,itraconazole,5-fluorocytosine and amphotericin B were 3.9%,3.6%,2.5%,0.5% and 0,respectively. The factors related to nosocomial C. albicans infection were the use of antibiotics and condition,invasive procedure,physical fitness,age,basic state of patients,etc.CONCLUSIONS The incidence and resistance of C. albicans infection in a hospital have increasing by years. Proper use of antibiotics and immunodepressors,reduction of unnecessary operation,and early diagnosis and treatment are the keys in preventing from systemic C. albicans infection.