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At least 937 records · Page 52Linked to original sources
PubMed1992

Serovar, biotype, phage type, toxigenicity & antibiotic susceptibility patterns of Vibrio cholerae isolated during two consecutive cholera seasons (1989-90) in Calcutta.

Characteristics of V. cholerae isolated from patients of acute secretory diarrhoea admitted to the Infectious Diseases Hospital, Calcutta during two consecutive cholera seasons (1989 and 1990), with special emphasis on biotyping and toxigenicity, were investigated. The isolation rates of V. cholerae during 1989 and 1990 were 78 and 85.1 per cent respectively, with Inaba serotype dominating in 1989 and Ogawa in 1990. All the V. cholerae 01 strains isolated in this study belonged to biotype Eltor with phage type 4 dominating (48.8%). Most of the strains of V. cholerae were resistant to 10 and 150 micrograms/ml of 0/129 vibriostatic agent. Similarly, majority of the V. cholerae strains were resistant to furazolidone (95.7%), cotrimoxazole (83%) and tetracycline (63.1%) and several resistance patterns were encountered. All the V. cholerae 01 strains examined produced cholera toxin (CT) in amounts ranging between greater than 70 pg/ml and greater than 2.5 ng/ml. In contrast, all but one of the non-01 strains isolated in this study did not produce CT. Further studies are required to elucidate the mechanism involved in the pathogenesis of non-01 V. cholerae mediated diarrhoea.

Anti-Bacterial Agents↗
PubMed1992

Multidrug resistant typhoid fever: therapeutic considerations.

Forty six blood culture positive cases were studied during the current outbreak of multidrug resistant typhoid fever (MRTF). The present outbreak was caused by E1 phage type and organisms were resistant to all commonly used drugs for the treatment of typhoid fever, viz., chloramphenicol (78%), co-trimoxazole (76%) and ampicillin (68%). Treatment failures with chloramphenicol (45.5%) corroborated well with in vitro resistance. No treatment failure was seen with chloramphenicol and ceftriaxone, when these drugs were used in cases infected with sensitive strains. Among the alternative drugs used in cases with in vitro sensitivity, successful clinical response was seen with ceftriaxone (4/4) and cefotaxime (8/9) as compared to cephalexin (3/5) or a combination of cephalexin and furazolidone (9/12).

Ampicillin Resistance↗
PubMed1975

Cholestatic hepatitis after administration of furan derivatives.

A patient developed cholestatic hepatitis while being treated with nitrofurantoin. A second episode of jaundice followed the intravaginal administration of a mixture of furazolidone and nifuroxime. It is important to consider possible cross-sensitivity of chemically related compounds even when they are administered by different routes.

Adult↗
PubMed1992

[The role of the polyclinic in raising the efficacy of rehabilitation with peptic ulcer patients].

The authors provide the results of the treatment and prophylaxis of peptic ulcer (PU) patients followed up by the polyclinic for 14 years. On a large factual material they estimate the efficacy of PU patients treatment with the use of drugs belonging to different groups, including drugs that exert antisecretory, cytoprotective and antibacterial effects. During the follow-up period, the number of patients with medium-grave and grave PU decreased whereas that of patients with mild disease and no relapses rose for 4-5 years and over (from 4.8% in 1972 to 39.6% in 1989). It has been established that the efficacy of rehabilitation measures for PU is determined by a lot of factors, first of all by adequate drug therapy with the use of the novel pharmacological preparations: selective blockers of histamine H2-receptors (ranitidine, famotidine), colloidal bismuth subcitrate (de-nol) that exert a cytoprotective and antibacterial action on Helicobacter pylori. The combination of the indicated remedies with antibacterial drugs (trichopol, oxacillin, furazolidon) for the treatment of PU relapses and their prevention is based.

Ambulatory Care↗
PubMed2004

[Long-term therapeutic effect of triple therapy consisted of omeperazole, clarithromycin and amoxycillin in children with Helicobacter pylori infection and approach to re-treatment after failure of the treatment].

OBJECTIVE: Helicobacter pylori (Hp) infection presents high prevalence in the world, but there are few pediatric assays evaluating antimicrobial treatment using a short regimen of triple therapy. To evaluate the eradication rate and long term therapeutic effect of a triple therapy consisted of omeperazole, clarithromycin (CLA) and amoxycillin (AMO) on Hp infection, the authors explored the alternative therapeutic programs and their effects after first therapeutic failure. METHODS: A total of 192 children with Hp infection were divided into two groups: 157 children were given the triple therapy for one week (CLA group); 35 children were given another triple therapy composed of omeperazole, metronidazole (MET) and AMO for two weeks (MET group). All of the children were followed up for 1 - 36 months after the therapies ended. Twenty-two children in whom Hp was eradicated with CLA triple therapy were followed up for 3 years. The children of the two groups who had therapeutic failure were given re-treatment as follows. CLA triple therapy was given for one week to the children who had failure after MET triple therapy; increased doses of CLA with longer treatment course was given to the children who had failure after CLA triple therapy. A tetra therapy consisted of omeperazole, colloidal bismuth subcitrate (CBS), furazolidone (FUR) and AMO was given to the children in whom the re-treatment failed. RESULTS: The Hp eradication and ulcer recovery rate of CLA group was 90.4% (142/157) and 96.9% (32/33), respectively; the Hp eradication rate of MET group was 77% (27/35). There was significant difference between eradication rates of the two groups (chi(2) = 4.69, P < 0.05). The recurrence rate of 22 Hp eradicated children treated with CLA triple therapy was 4.5% (1/22) during the 3-year follow-up. The eradication rate of the three re-treatment programs for 29 children was 75% (6/8), 77% (11/15) and 100% (6/6), respectively. CONCLUSION: (1) Omeperazole, CLA and AMO triple therapy for one week was the best to eradicate Hp infection with high eradication rate, few side effects, short period of treatment, good compliance and low recurrence rate. (2) Proper increase of CLA dose and longer therapeutic course may increase the eradication rate. Omeperazole, CBA, FUR and AMO tetra therapeutic program may be used as an alternative treatment in patients who develop resistance to CLA triple therapy.

Adolescent↗
PubMed2004

Antimicrobial resistance in selected bacterial enteropathogens in north India.

BACKGROUND & OBJECTIVES: The resistance of enteropathogenic bacteria to commonly prescribed antibiotics is increasing both in developing as well as in developed countries. Resistance has emerged even to newer, more potent antimicrobial agents. The present study was therefore undertaken to report the current antibiotic resistance in common bacterial enteropathogens isolated in a tertiary care hospital in north India. METHODS: Faecal samples from 1802 patients were cultured for common bacterial enteropathogens and identified by standard methods. Antibiotic susceptibility was done by Stoke's disk diffusion method. The clinical and demographic profile of the patients was noted. RESULTS: Stool specimens from 119 (88 male, 31 female) patients yielded Shigella, Salmonella, Vibrio cholerae or Aeromonas. Fifty two per cent (62/119) of patients were children and 70 per cent were below the age of 5 yr. Twenty seven patients developed hospital acquired diarrhoea. Among all enteropathogens, Shigella spp. was the commonest followed by non-typhoidal Salmonella (27), V. cholerae O1 El tor serotype Ogawa (19), Aeromonas spp. (14), Salmonella Typhi and S. paratyphi A (2 isolates each). Resistance to antimicrobial agents was common among all pathogens. Among shigellae an overall resistance of 63.6, 58.1 and 16.3 per cent was observed for nalidixic acid, cotrimoxazole and furazolidone respectively. Seven isolates of Shigella were resistant to ciprofloxacin, (18.5%) of non-typhoidal salmonellae were resistant to ciprofloxacin. V. cholerae were generally susceptible to tetracycline (only 1 isolate out of 13 resistant) and other drugs except nalidixic acid (89.5% resistance) and cotrimoxazole (77.8% resistance). INTERPRETATION & CONCLUSION: Enteropathogens have developed high level resistance to first line agents used for empiric treatment of diarrhoea. Progressively increasing resistance to ciprofloxacin is a serious cause of concern.

Adult↗
PubMed1978

[Chromosomal structure or porcine lymphocytes effected by food additives].

Different concentrations of food additives were introduced in cultures of pig lymphocytes. No special chromosomal damage were induced by anticoccidians. On the contrary some antibiotics caused chromosomic anomalies. Chloramphenicol and furazolidone assayed in vitro and in vivo had also an antimitotic effect. The purpose of this work was to know the cytotoxic effect of some substances: a preliminary and cheap test could be a cytogenetic examination in vitro.

Animals↗
PubMed2004

[Antimicrobial activity of new original 2-aryliden-6-furfuryliden cyclohexanones and hexahydroindazoles on their basis].

Antimicrobial activity of 25 new original 2-aryliden-6-furfuryliden cyclohexanones and hexahydroindazoles based on them was studied. The majority of the compounds had low or moderate activity against the test cultures of Staphylococcus spp., Pseudomonas aeruginosa, Proteus spp. and Escherichia coil. Compound XIX (2,3-diphenyl-7-(5-nitrofurfuryliden)-3,3a,4,5,6,7-hexahydroindazole) with high antistaphylococcal activity was selected among several 2-aryliden-6-furfuryliden cyclohexanones and hexahydroindazoles. The activity of compound XIX was tested with the use of 105 clinical isolates of staphylococci. Comparative antistaphylococcal activity of compound XIX, furazolidone and sodium cefotaxime against the isolates was estimated. The impact of the microbial load, pH of the nutrient medium and the presence of 1%, 5% or 10% of serum or blood in the medium on the antimicrobial activity of compound XIX was evaluated. The results are in favour of further research on compound XIX as a potential agent of etiotropic therapy for staphylococcal infection.

Anti-Bacterial Agents↗
PubMedDate not supplied

[Antibiotic resistance of shigellae and rationale for etiotropic therapy of Shigella infections].

The study was aimed at determining sensitivity of shigellae to antibacterial preparations and their clinical effectiveness for correcting recommendations on the empirical therapy of acute Shigella infections (ASI). The sensitivity of 164 S. flexneri strains and 80 S. sonnei strains, isolated in 1996-2003 in the Sumy region, Ukraine, was determined with respect to 19 antibacterial preparations: ampicillin (Am), tetracycline (Te), rifampicin (Ri), chloramphenicol (Ca), streptomycin (St), fusidin (Fu), kanamycin (Kn), erythromycin (Er), carbenicillin (Cb), doxycycline (Do), gentamicin (Ge), ofloxacin (Of), cefazolin (Cf), ciprofloxacin (Cp). S. flexneri and S. sonnei were found to be highly sensitive to Am (100%), Te (100%), Cb (90% and 50% respectively), Do (90% and 35% respectively), Fu (100%), Er (100%), Ri (100%), Ca (71.8% and 45% respectively), St (81% and 40% respectively). Some isolated cultures were resistant to fluorochinolones. In addition, the clinical and laboratory analysis of the effectiveness of some preparations was carried out. A total of 202 patients, divided into 6 groups, received furazolidone, chloramphenicol, norfloxacin, phthalazole, polymyxin and the combination of several antibacterial preparations. High efficiency of norfloxacin in the treatment of ASI was confirmed. The use of other preparations and their combinations was found to produce only a slight effect.

Acute Disease↗
PubMed2005

Diversity of Vibrio cholerae strains isolated in Delhi, India, during 1992-2000.

The National Institute of Communicable Diseases (NICD), Delhi, India, conducts a laboratory-based surveillance of cholera cases referred from the Infectious Disease Hospital, Delhi. The prevalence and antimicrobial susceptibilities of Vibrio cholerae O1, O139, and others, isolated from cholera patients for nine years, were analyzed to determine the changing trends in their isolation and drug-resistance patterns. In total, 29,196 stool samples or rectal swabs, collected during April 1992-December 2000, were included in this study. Of these, 13,730 (47%) were positive for V. cholerae: 11,091 for V. cholerae O1 (80.7%) and 1,943 (14%) for V. cholerae O139, and 696 (5%) were non-O1 and non-O139. V. cholerae O1 was the dominant serotype during 1992-1993, when V. cholerae O139 emerged as a new serotype but, thereafter, remained low from 1994 to 1999. Phenotypically, re-emerged V. cholerae O139 in 2000 displayed a difference compared to those that appeared in 1992-1993, in that the current O139 strains were sensitive to co-trimoxazole. Resistance to nalidixic acid and furazolidone was constantly high (100%) among strains of V. cholerae O1 and O139. All strains of V. cholerae were uniformly susceptible to chloramphenicol, tetracycline, amikacin, and norfloxacin. Molecular studies revealed different clones of V. cholerae O1 and O139 prevailing in the country with the re-emergence of V. cholerae O139 of a different clonality in Delhi in 2000, which is likely to play a critical role in temporal antigenic variation among the serogroups of V. cholerae.

Anti-Bacterial Agents↗
PubMed2004

[Comparative evaluation of activity of antibacterial agents in vitro and their efficacy in experimental cholera due to strains of Vibrio cholerae O1 and O139 serogroups in albino mice].

Activity of 16 antibacterial agents against human isolates of Vibrio cholerae O1 and O139 serogroups (P-5879, 4990, 143/23, and MO-45, P- 16065 respectively) was studied in vitro. The efficacy of the agents was studied in a model of generalized cholera in albino mice. Susceptibility of Vibrio cholerae P-5879 (used as the control) in the in vitro experiments with respect to the antibacterial agents correlated with their in vivo efficacy. The strains of Vibrio cholerae O1 and O139 serogroups isolated within the recent years had transmissive markers of resistance to streptomycin, trimethoprime/sulfamethoxazole, tetracycline, chloramphenicol and not transmitted by conjugation markers of resistance to rifampicin, furazolidone, nalidixic acid. The specific feature of the experimental infection due to such strains was the failure not only of the antibacterials of the resistance spectrum of the pathogen but also of the antibiotics showing in vitro susceptibility (betalactams, fluoroquinolones) that required additional bacteriological control on the 2nd or 3rd day of the etiotropic therapy for early replacement of the antibacterial agent.

Animals↗
PubMed1992

Multidrug resistant Salmonella typhi in Calicut, south India.

Eighty S. typhi strains isolated during the period of one year (July 1989 to June 1990) were tested for susceptibility to chloramphenicol, ampicillin, cotrimoxazole, gentamicin, kanamycin, cefazolin, furazolidone and ciprofloxacin. Determination of minimum inhibitory concentration (MIC) by tube dilution method showed that the multiply resistant S. typhi strains were resistant to chloramphenicol and ampicillin up to a concentration of 1000 micrograms/ml. MIC of sulphamethoxazole was found to be 800 micrograms/ml and trimethoprim 160 micrograms/ml. The presence of R plasmid was demonstrated by resistance transfer experiments using Esch. coli K12 (F-Lac+Nal-) as the recipient. On phage typing, most of the multiresistant S. typhi isolates were found to belong to phage type E1.

Anti-Bacterial Agents↗
PubMed2005

Drug-resistant salmonellosis.

After the development of plasmid-mediated resistance against first-line drugs, the emergence of chromosomally-mediated quinolone resistance in typhoid fever has become a major concern. Quinolone insensitivity and treatment failures with ciprofloxacin are being increasingly reported. However, third generation cephalosporins have come as a saviour. To overcome fluoroquinolone insensitivity, higher doses with longer duration of treatment is recommended. Moreover, return of chloramphenicol and furazolidone sensitivity shown by different studies is a welcome observation.

Cephalosporins↗
PubMed2005

[Analysis of drug resistance spectrum and its mechanism in 1017 clinical bacterial isolates].

OBJECTIVE: To investigate the drug susceptibility of the clinical bacterial isolates to provide evidence for more adequate use of antibiotics. METHODS: Altogether 1017 clinical bacterial isolates were identified by BD Phoenix and tested for resistance against antimicrobial agents by K-B method. WHONET5 was applied for the analysis. RESULTS: The most frequent bacteria detected included P. aeruginosa (19.37%), coagulase-negative Staphylococci (CNS, 17.70%), E. coli (13.27%), S. aureu (SA, 12.09%), E. faecalis (11.8%), and K. pneumoniae (7.57%). In gram-negative isolates, the susceptibility rate of imipenem was 81.5%, and that of ceftazidime was above 70%. The incidences of E.coli and K. pneumoniae isolates producing extended spectrum beta-lactamase (ESBLs) were 34.8% and 45.5% respectively. In gram-positive isolates, the susceptibility rates of vancomycin and Teicoplanin were 98.8% and 100.0% respectively, and those of furazolidone, imipenem, amikacin, piperacillin/ tazobactam were above 70%. The oxacillin resistant rates of CNS and SA were 78.2% and 46.8%. CONCLUSION: The 1017 clinical bacterial isolates are characterized by high ratio of ESBL production and oxacillin resistance, suggesting the importance of adequate use of antimicrobial agents and effective control measures for reducing the drug resistance and preventing the spread of multi drug- resistant bacteria.

Anti-Bacterial Agents↗
PubMed1991

Resolution of resistant vaginal trichomoniasis associated with the use of intravaginal nonoxynol-9.

An otherwise healthy, sexually inactive woman was determined by in vitro susceptibility testing to have vaginal infection by a strain of Trichomonas vaginalis with high-grade metronidazole resistance. Prolonged high-dose oral and intravaginal metronidazole therapy did not resolve the infection, but caused temporary peripheral neuropathy. Tinidazole was ineffective as well. Serendipitous use of topical intravaginal nonoxynol-9 for contraception appeared to resolve the infection. We reviewed reinfection, noncompliance with therapy, and concomitant use of other drugs that degrade the efficacy of metronidazole as possible causes of falsely "resistant" trichomoniasis. The literature suggests that mebendazole, furazolidone, and anisomycin may be effective for treatment of metronidazole-resistant trichomoniasis. This case and previously published laboratory data suggest that intravaginal nonoxynol-9 deserves further study as a treatment for resistant trichomoniasis, though trichomonal coinfection of the patient's urethra, Skene glands, and sexual partner would not likely be resolved by such therapy.

Adult↗
PubMed2006

Molecular typing of Salmonella enterica serotype Worthington isolates from infantile diarrhoea.

BACKGROUND AND OBJECTIVES: Salmonella Worthington has been known to be a causative agent for childhood diarrhoea. There is a paucity of information on the molecular relatedness of the strains isolated in various hospitals in India. The present study was carried out to attempt molecular typing of a cluster of Salmonella Worthington isolates obtained from cases of infantile diarrhoea during a six month period, from a tertiary care paediatric hospital in Delhi, India. METHODS: Nine isolates of S. Worthington obtained from faecal samples of infants suffering from diarrhoea during October 2001 to March 2002, were identified by the conventional biochemical methods and by serotyping. The antimicrobial susceptibility was determined by the disk diffusion method. Molecular typing was done by ribotyping. RESULTS: Eight patients were admitted to 3 different wards of the hospital and one was an outpatient. Four patients including the first patient visited the hospital with diarrhoea as the presenting symptom while five developed diarrhoea after admission. Stool microscopy showed no specific findings. Salmonella Worthington was isolated from stool cultures of these patients. Repeated cultures of the common drinking water source of the hospital and the milk supplied to children from central kitchen were negative for known pathogens. All S. Worthington isolates were resistant to all the beta-lactams tested including third generation cephalosporins. Eight isolates were sensitive to furazolidone and 6 to ciprofloxacin. Molecular characterization by ribotyping revealed four different clones. INTERPRETATION AND CONCLUSION: As four different ribotypes of the isolated Salmonella Worthington isolates were identified, it was clear that there was no single source of infection.

Diarrhea↗
PubMed2006

[Determination of metabolites of nitrofuran antibiotics in royal jelly by high performance liquid chromatography-tandem mass spectrometry].

Nitrofurans are a group of widely used veterinary antibiotics that have been banned in many countries. This has generated a great deal of interests and demands for assay of nitrofurans in animal food products. To our knowledge, this is the first time that a high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method has been successfully developed for simultaneously analyzing the metabolites of four nitrofuran antibiotics (furazolidone, furaltadone, nitrofurazone and nitrofurantoin) in royal jelly. Trichloroacetic acid solution was used both to precipitate proteins and to provide acidic reaction condition. Four isotope internal standards were utilized to improve the quantitative precision. The limits of detection (LODs) were 0.03 microg/kg for the metabolite of furaltadone and 0.05 microg/kg for the other three metabolites. The limits of quantitation were 0.20 microg/kg for the metabolite of furaltadone and 0.25 microg/kg for the other three metabolites. The linear range was 0.4-20 ng/mL for all the target analytes. The recoveries calibrated by internal standard were in the range of 97.7%-104.8 with the relative standard deviations (RSDs) of 2.7-9.7. It showed that this method could meet the requirements of national monitoring plan in China and the Minimum Required Performance Limits (MRPL) set by the European Union.

Anti-Bacterial Agents↗
PubMed1991

Cryptosporidium oocysts in stool specimens submitted to routine ova & parasite examination: 38 months survey.

The fecal samples submitted for routine ova and parasite examination in Children's Hospital, Bangkok, Thailand, between October 1984 and November 1987, were investigated for Cryptosporidial oocysts, indicated that the prevalence was 1.61 per cent. The infection played an important role in aetiology of gastroenteritis and/or diarrhea. Because the children, particularly those less than 2 years of age who had watery and non-bloody stools and accompanied with gastrointestinal symptoms were found to have Cryptosporidium oocysts, almost (84.31%) of the infected children were hospitalized. Suggestively, Cryptosporidiosis should be included in the diagnosis of diarrheal disease in children and diarrheal illness in immunocompetent patients. In this report, the source of infection and the route of transmission was not identified but 80.39 per cent of children with cryptosporidiosis children were admitted with primary diagnosis of diarrhea together with pneumonia. The medication was Furazolidone or the combination of Trimethoprime and Sulphamethoxazone.

Child, Preschool↗