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Bovines are recognized as an important reservoir of Shiga toxin-producing Escherichia coli (STEC). Although STEC strains are significant foodborne pathogens, not all of the STEC held by cattle are pathogenic, and which type of STEC that will become epidemic in humans is unpredictable. Information about the prevalence of serotype and virulence gene distribution in beef cattle is insufficient to develop monitoring and controlling activities for a food safety and security program. Thus, this study investigated the prevalence of O157 and non-O157 STEC in Japanese beef cattle and characterized the isolates by the type of O antigen and several virulence markers to help predict the pathogenicity. In this study, 64.2% (176 of 274) of enrichment cultures of fecal samples collected from an abattoir and farms were stx1 and/or stx2 positive by PCR. STEC strains were isolated from 22.1% (39 of 176) of the positive fecal samples, and these isolates represented 17 types of O antigen (O1, O2 or O50, O5, O8, O55, O84, O91, O109, O113, O136, O150, O156, O157, O163, O168, O174, and O177). Two selective media targeting major STEC groups, cefixime-tellurite sorbitol MacConkey agar and CHROMagar O26/O157, allowed isolation of a variety of STEC strains. The most frequently isolated STEC was O113 (8 of 39), which has previously been reported as a cause of foodborne infections. Although most of the O113 STEC isolated from infected patients possessed the enterohemolysin (hlyA) gene, none of the O113 STEC cattle isolates possessed the hlyA gene. The second most common isolate was O157 (6 of 39), and all these isolates contained common virulence factors, including eae, tir, lpf1, lpf2, and hlyA. This study shows the prevalence of O157 and non-O157 STEC in Japanese beef cattle and the relationship of O antigen and virulotypes of the isolates. This information may improve identification of the source of infection, developing surveillance programs or the current understanding of virulence factors of STEC infections.
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We conclude that outpatient therapy is safe and effective in febrile patients with sickle cell disease who meet the criteria for a low risk of sepsis.
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Children identified as low risk for sepsis were treated with an initial dose of intravenous ceftriaxone, followed by outpatient therapy with oral cefixime, and were monitored for 14 days after the initial visit. Compliance was assessed by phone calls to parents and by analysis of urine samples.
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This method is simple, practical and relatively interference-free for determination of Cfx in pharmaceutical tablets and serum samples.
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Neisseria gonorrhoeae infections are common bacterial sexually transmitted diseases. Men will usually experience lower urinary tract symptons attributed to urethritis, epididymitis, proctitis, or prostatitis, with associated mucopurulent urethral discharge. Many women are asymptomatic. But, occasionally, they have symptons of vaginal and pelvic discomfort of dysuria, and these infections can lead to pelvic inflammatory disease. Recentry, high prevalence of Neisseria gonorrhoeae isolates resistant to antimicrobial agents is a serious problem in the treatment of gonorrhea. For example, in Fukuoka city, Japan, the proportion of the isolates resistant to ciprofloxacin (CPFX) were 73.4% in 2006 and it was still so high. The proportion of the isolates resistant to tetracycline (TC) was 38.5% in 2006 and that of isolates resistant to penicillin G (PCG) was 17.5%. Owing to this high prevalence of antimicrobial-resistant Neisseria gonorrhoeae in Japan, the clinical efficacy rates of oral antimicrobial agents have become lower. So, as first-line therapy for gonococcal infections, only three parenteral regimens of single doses of ceftriaxone, cefodizime or spectinomycin are recommended by the Japanese Society for Sexually Transmitted Diseases. In the circumstances, we studied in vitro activity of combinations of oral agents such as, beta-lactam and azithromycin, fluoroquinolone and azithromycin, or beta-lactam and fluoroquinolone against Neisseria gonorrhoeae. The cefixime+azithromycin combination demonstrated greater synergy than other combinations.
Sixty-one patients received cefixime and 65 amoxicillin plus retilmicin. There were no significant differences between both groups of patients. Thirty-two patients presented bacteremia (25.4%). The mean (SD) eak and trough concentrations of netilmicin were 11.4 (2.8) mg/l and 0.38 (0.4) mg/l, respectively. Clinical response was favorable in 97% of patients treated with cefixime and in 98% of those treated with amoxicilin plus netilmicin (p = NS). The infection recurred in 10 out of 59 patients (16.9%) in the cefixime arm of the study and in 9 out of 64 patients (14%) treated with amoxicillin plus netilmicin (p = NS). Tolerance to the study drugs was good in both arms of the study, and renal function remained normal.
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There were 188 reports of vaginal candidiasis in 31 588 women, aged > or =16 years, treated with antibiotics and 70 in the 45 492 treated with antidepressants. The relative risk for vaginal candidiasis (antibiotic/antidepressants), was highest in the second week, 10.70 (95% CI 4.86-23.55) but was also significantly greater in the first and third weeks after the start of treatment. The risk was also higher in each of the 3 weeks after starting the course for five of the antibiotics, compared individually to the group treated with antidepressants, the exception being fosfomycin, which had a much smaller cohort.
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Cefixim belongs to oral cephalosporins of the third generation and has the longest half-life period among all oral cephalosporins and, therefore can be taken once a day. Moreover, cefixim presents in high concentrations in the urine, kidneys and urinary tract. In vitro, this drug has high activity against basic pathogens of urogenital infection. A randomized clinical trial has found that cefixim has higher clinical and microbiological efficacy than ciprofloxacin in patients with acute uncomplicated cystitis.
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Resistance to cephalosporins in Haemophilus influenzae is usually caused by characteristic alterations in penicillin-binding protein 3 (PBP3), encoded by the ftsI gene. Resistance to extended-spectrum cephalosporins is associated with high-level PBP3-mediated resistance (high-rPBP3), defined by the second stage S385T substitution in addition to a first stage substitution (R517H or N526K). The third stage L389F substitution is present in some high-rPBP3 strains. High-rPBP3 H. influenzae are considered rare outside Japan and Korea. In this study, 30 high-rPBP3 isolates from Norway, collected between 2006 and 2013, were examined by serotyping, multilocus sequence typing (MLST), ftsI sequencing, detection of beta-lactamase genes and minimum inhibitory concentration (MIC) determination. MICs were interpreted according to clinical breakpoints from the European Committee on Antimicrobial Susceptibility Testing (EUCAST). Respiratory isolates predominated (proportion: 24/30). The 30 isolates included one serotype f isolate, while the remaining 29 lacked polysaccharide capsule genes. Resistance to extended-spectrum cephalosporins (cefixime, 29 isolates/30 isolates; cefepime, 28/30; cefotaxime, 26 /30; ceftaroline, 26/30; ceftriaxone, 14/30), beta-lactamase production (11/30) and co-resistance to non-beta-lactams (trimethoprim-sulfamethoxazole, 13/30; tetracycline, 4/30; chloramphenicol, 4/30; ciprofloxacin, 3/30) was frequent. The N526K substitution in PBP3 was present in 23 of 30 isolates; these included a blood isolate which represents the first invasive S385T + N526K isolate reported from Europe. The L389F substitution, present in 16 of 30 isolates, coincided with higher beta-lactam MICs. Non-susceptibility to meropenem was frequent in S385T + L389F + N526K isolates (8/12). All 11 beta-lactamase positive isolates were TEM-1. Five clonal groups of two to 10 isolates with identical MLST-ftsI allelic profiles were observed, including the first reported high-rPBP3 clone with TEM-1 beta-lactamase and co-resistance to ciprofloxacin, tetracycline, chloramphenicol and trimethoprim-sulfamethoxazole. Prior to this study, no multidrug resistant high-rPBP3 H. influenzae had been reported in Norway. Intensified surveillance of antimicrobial resistance is needed to guide empiric therapy.