EAEC is a diarrheal pathogen of emerging importance. Correlation between pCVD432 PCR and the HeLa cell line assay was confirmed in children with diarrhea. In comparison to the assay for aggregative adherence, the EAEC PCR has been found to be simple and specific in many epidemiological studies. The typical EAEC (73.3%) strains (with pCVD432 and aggR genes) identified in this study were heterogeneous with respect to virulence genes. This study also showed that EAEC isolates were highly resistant to tetracycline, co-trimoxazole, and ampicillin, which are the most commonly used antibiotics in our area.
The present study was performed to investigate the contribution of typical and atypical enteropathogenic Escherichia coli (EPEC) as a cause of infectious diarrhoea among children less than 10 years old in Iran. During the summer months, 247 specimens from children with diarrhoea and 1108 from asymptomatic children were analysed for the presence of EPEC and other bacterial pathogens. Potential enteric pathogens were identified in 140 cases of children with diarrhoea (56?7 %). EPEC was the most frequently identified agent (111 cases), followed by Shiga toxin-producing E. coli (13), Shigella (9), Salmonella (6) and Aeromonas sp. (1). EPEC isolates were examined for the presence of eaeA, bfpA and stx genes by PCR. EPEC isolates were classified as typical (eaeA + bfpA + ) or atypical (eaeA + bfpA " ). Typical EPEC was diagnosed in 35 cases (11?8 %), compared with 8 (0?4 %) in the asymptomatic group (P<0?05). Atypical EPEC strains were isolated from 23 cases (9?3 %), compared with 13 (1?2 %) of the healthy control group (P<0?05). In conclusion, the data suggest that typical and atypical EPEC are an important cause of diarrhoea in Iranian children.
BackgroundClostridium difficile infection (CDI) is major growing problem in hospitals and its high incidence has been reported in recent years.ObjectivesThe aim of this study was to investigate the antimicrobial susceptibility patterns of C. difficile clinical isolates against antibiotics commonly used for treatment CDI in hospitalized patients.Material and MethodsDuring a 12 month study, 75 C. difficile isolates were collected from 390 patients with CDI. All samples were treated with alcohol and yeast extract broth. The treated suspensions were cultured on a selective cycloserine cefoxitin fructose agar (CCFA) supplemented with 5% sheep blood and incubated in anaerobic conditions, at 37 °C for 5 days. Cdd-3, tcdA and tcdB genes were identified using PCR assay.ResultsThe prevalence of A+B+ , A+ B- and A- B+ strains were 64(85.3%), 5(6.7%) and 6(8%) respectively. In vitro susceptibility of 75 clinical isolates of C. difficile to 5 antimicrobial agents, including metronidazole, vancomycin, clindamycin, erythromycin and cefotaxime were investigated by Clinical and Laboratory Standards Institute (CLSI) agar dilution method. Metronidazole and vancomycin had good activity against C. difficile isolates with MIC90s of 2 and 1 µg/ml, respectively. Seventy one (94.6%) of strains was inhibited by concentrations that did not exceed 2µg/ml for metronidazole. Resistant to metronidazole observed in 5.3% of isolates. Forty three (57.3%) of the isolates were resistant to erythromycin. Of 43 resistant strains to erythromycin, 9 (12%) isolates had high-level MIC of more than 64 µg/ml. All strains were resistant to cefotaxime. Sixty seven (89.3%) isolates were resistant to clindamycin (MIC90s > 256 µg/ml) and only 6.7% were sensitive to clindamycin. Multidrug-resistant (three or more antibiotics) was seen in 36(48%) isolates.ConclusionsMetronidazole and vancomycin still seem to be most effective drugs for treatment CDI.
The clinical and pathologic features of four new and eight previously reported primary carcinomas of the broad ligament have been reviewed. The patients' ages ranged from 29 to 70 years (average, 46) and the most common clinical presentations were vague lower abdominal pain, a palpable pelvic mass, and an associated disorder such as pelvic endometriosis. The tumors ranged from 4.5 to 13 cm in greatest dimension and were solid, cystic, or mixed. All of them were unilateral. Review of the pathologic descriptions and illustrations of the cases in the literature and microscopic review of one reported case revealed that four of the tumors were endometrioid carcinomas, four were clear cell carcinomas, one was probably a mucinous adenocarcinoma, two were papillary adenocarcinomas of undetermined cell type, and one was a serous papillary cystadenoma of borderline malignancy with microinvasion. Three patients were treated by excision of the tumor alone. Seven of them were treated by total abdominal hysterectomy and salpingo-oophorectomy; three patients received postoperative radiation therapy, and one of them also received chemotherapy. Eight patients were free of disease 6 months to 7 years postoperatively, and one patient with distant metastasis (rib) at the time of operation lived for 27 months. In three cases no follow-up data were available. Three of the four patients in current series were found to have pelvic endometriosis at the time of operation. Three of their carcinomas were endometrioid and one was of clear cell type, suggesting the possibility of an origin from endometriotic tissue in the broad ligament.
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