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At least 919 records · Page 51Linked to original sources
PubMed1999

An El Tor cholera outbreak in Maldah district, West Bengal.

An outbreak of cholera occurred in Maldah district, West Bengal during July-August 1998. Attack rate was 34/1000. Cases were more (59.3%) amongst adults (> 15 years.). V. cholerae 01 biotype E1 Tor serotype ogawa was isolated as a single pathogen from 52.9% (9/17 samples examined). All V. cholerae strains belonged to phage type 2 (Basu and Mukherjee scheme) and type 27 (new phage type scheme). The strains were resistant to co-trimoxazole, furazolidone, ampicillin, streptomycin and nalidixic acid.

Adolescent↗
PubMed1976

Global surveillance of antibiotic sensitivity of Vibrio cholerae.

Strains of Vibrio cholerae-1156 from various parts of the world-were examined by standardized antibiotic sensitivity tests in one centre, to determine the global incidence of antibiotic resistance in this organism and to assess the extent to which differences in methods of sensitivity testing might be responsible for discrepancies in the reported incidence of resistant strains. Of the strains examined, 1127 were fully sensitive to ampicillin, chloramphenicol, tetracycline, furazolidone, and three different sulphonamides, 27 showed stable and reproducible resistance to one or more of these agents, and 2 proved to contain a minority of cells with unstable, presumably plasmid-borne, resistance to chloram-phenicol. Unstable resistance to antibiotics may be common in V. cholerae but rarely recognized, and may account for some of the discrepancies in the reported incidence of resistant strains.

Anti-Bacterial Agents↗
PubMed2000

[Experimental resistance of Vibrio cholerae el tor to nalidixic acid and fluoroquinolones].

It was shown that sensitivity of Vibrio cholerae eltor P-5879 to tetracycline, levomycetin, furazolidone, trimethoprim/sulfamethoxazole, aminoglycosides, beta-lactams, rifampicin, quinolones in vitro correlated with drugs efficacy in the treatment of experimental cholera of albino mice. Mutants of V. cholerae eltor P-5879 Nalr resistant to nalidixic acid (MIC 160-200 mg/l) formed with frequency 10(-9)-110(-8) had no cross resistance to fluoroquinolones. But the efficacy of ofloxacin, lomefloxacin, norfloxacin against these mutants in vivo reduced, though it was not changed in vitro. Mutants of V. cholerae eltor P-5879 resistant to fluoroquinolones and selected after culturing in the presence of the drugs had cross resistance to all quinolones studied. Infection caused by Cpfr mutant could not be treated with nalidixic acid and fluoroquinolones, therapeutic efficacy of rifampicin and beta-lactams, also reduced though sensitivity in vitro was not changed. The results of investigation proves the necessity of quinolones use for cholerae treatment as it is recommended for other severe enteric infections.

Animals↗
PubMed1975

[Study of the antibacterial activity of ftorlon threads].

The study concerned antibacterial properties of the ftorlon threads obtained from acetone or dimethylformamide polymer solution containing antibacterial derivatives of 5-nitrofuran added which were known to be active against the germs most commonly causing the postoperative infection including Staphylococci, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris and Candida type fungi. Basing of the laboratory test following the method of infected medium and suspension method it was found that the best effects were obtained when using threads produced from the acetone polymer solution added with beta-(5-nitrofuryl-2)-acroleine and those containing furazolidone obtained from acetone or dimethylformamide polymer solution. Antibacterial properties of the ftorlon threads did not change upon autoclaving, gamma irradiation and prolonged storage.

Candidiasis↗
PubMed2000

Outbreak of cholera caused by Vibrio cholerae 01 intermediately resistant to norfloxacin at Malda, West Bengal.

During the end of September 1997, an unusual outbreak of severe dehydrating watery diarrhoea cases and deaths were reported from Malda town. Vibrio cholerae 01 El tor, the causative agent responsible for this episode was isolated from 56.5% of cases sampled. Three of the five drinking water samples were also positive for V cholerae 01. Majority of cases were adults. Isolated strains were uniformly resistant to furazolidone and intermediately to norfloxacin. Indiscriminate use of antibiotic should be discouraged for development of multidrug resistant strains.

Adult↗
PubMed2000

[Susceptibility to selected coagulase-negative chemotherapeutic agents of methicillin resistant staphylococci isolated from clinical materials in 1997-1998].

The study was aimed at assessment of the sensitivity of methicillin-resistant coagulase-negative staphylococci isolated from clinical material in 1997/1998 to selected chemotherapeutic agents. The investigated material comprised 96 methicillin-resistant coagulase-negative staphylococci from hospital and ambulatory infections isolated during the period from April 1997 to May 1998. Species affiliation was determined by classical identification methods and commercial diagnostic tests for identification of staphylococci. Methicillin resistance was determined by agar disk-diffusion method and screening. Sensitivity to chemotherapeutics was determined by agar disk-diffusion method and agar dilution methods. All the investigated strains were sensitive to nitrofurantoin, furazolidone and vancomycin. To teicoplanin--the second glycopeptide antibiotic--84% strains were sensitive, whereas the percentages of resistant and moderately sensitive strains amounted to 5.2% and 10.4%, respectively. 85% and 82% of coagulase-negative staphylococcal strains were sensitive to fusidic acid and mupirocin. Considerable differences were noted with respect to sensitivity to aminoglycoside group antibiotics. About 35% of strains were sensitive to gentamicin, and 90% sensitive to netilmicin. Ca. 40% of coagulase-negative staphylococci were resistant both to cotrimoxazole and trimethoprim, which, in view of 98% resistance to the second component of cotrimoxazole, may be associated with the activity of only one of the components of the drug--trimethoprim.

Coagulase↗
PubMedDate not supplied

Pathogenicity and drug susceptibility of the Pasteurella anatis isolated in chickens in Taiwan.

A strain of Pasteurella anatis (PA) was isolated from the sinus of an adult leghorn laying chicken with sinusitis, nasal discharge, drop in egg production, and low mortality, symptoms initially thought to indicate infectious coryza. The tiny, smooth, whitish colonies were identified as PA. To compare its pathogenicity with that of commercial broilers, nine groups, 10 birds per group, of 10-day-old broilers were individually inoculated with the strain of PA, Pasteurella multocida (PM), or Escherichia coli (EC) by intravenous, intraperitoneal, intramuscular, or subcutaneous inoculation. The PA was determined to cause the signs, lesions, and septicemic death, which are similar to the symptoms of PM or EC infection. At 1 wk postinfection (PI), the mortality rate was between that of PM and EC infection at 1 wk PI. Twenty antimicrobial-containing discs were evaluated, and the isolate was highly sensitive to cetiofer, amoxicillin, lincopectin, and furazolidone. Furthermore, it was moderately sensitive to tetracycline and enrofloxacin and only slightly sensitive to cephalothin, chloramphenicol, flumequine, nalidixic acid, neomycin, oxolinic acid, streptomycin, and trimethoprim. The PA infection was treated successfully with amoxicillin.

Animals↗
PubMed2001

Epidemic of Vibrio cholerae serogroup O139 in Berhampur, Orissa.

During the months of May-June 2000, 194 patients with watery diarrhoea were admitted to the Infectious Diseases Ward of the M.K.C.G. Medical College, Berhampur. Ninety four rectal swabs were collected and processed according to the standard procedures. Vibrio cholerae strains were isolated from 20 samples. Of these 20 isolates, two were found to be V. cholerae O1 EITor Ogawa strain and 18 were confirmed to be V. cholerae serotype O139. All V. cholerae O139 isolates were of a single phage type (phage type 1) and the two O1 strains were of phage type 3 and phage type 27 respectively. All 20 V. cholerae isolates were positive for CAMP test, and showed uniform resistance to furazolidone and sensitivity to co-trimoxazole, amoxycillin, norfloxacin, tetracycline and gentamycin. V. cholerae O139 serotype has not been reported earlier in south Orissa. This is probably the first report of its isolation from this area.

Cholera↗
PubMedDate not supplied

Liquid chromatographic determination of multiple sulfonamides, nitrofurans, and chloramphenicol residues in pasteurized milk.

A rapid and selective liquid chromatographic method was developed to detect 6 sulfonamides, 3 nitrofurans, and chloramphenicol residues in pasteurized milk. The 10 drugs were extracted with chloroform-acetone and the organic phase was evaporated; the residues were dissolved in an aqueous sodium acetate buffer solution 0.02M (pH = 4.8), and the fat was removed by washing with hexane. The aqueous layer was collected, filtered, and injected. The 6 sulfonamides and chloramphenicol were detected at 275 nm ultraviolet (UV) using a gradient system starting with sodium acetate buffer solution-acetonitrile (95 + 5) and finishing with sodium acetate buffer solution-acetonitrile (80 + 20). Nitrofurans were detected at 375 nm (UV) isocratically with sodium acetate buffer solution-acetonitrile (80 + 20). For 50 ppb fortified milk, the average recoveries were (sulfathiazole) 65.52%; (sulfamerazine) 75.36%; (sulfamethazine) 93.94%; (sulfachlorpyridazine) 75.94%; (sulfamethoxazole) 85.18%; (sulfamonomethoxine) 83.45%; (chloramphenicol) 104.17%; (nitrofurazone) 91.81%; (furazolidone) 100.76%; and (furaltadone) 72.38%. Method detection limits ranged from 4 ppb (nitrofurazone) to 16 ppb (sulfamethazine). Some matrix interferences (3-7 ppb) were observed only with sulfonamides.

Animals↗
PubMed1975

A screening method for determining nitrofuran drug residues in animal tissues.

A method was developed for measuring low levels of total nitrofurans in animal tissues and milk. The antimicrobial nitrofurans (5 or more products) used in agriculture are extracted from tissue with aqueous acid in the presence of ethyl acetate. After centrifugation and evaporation, the organic residue is washed with hexane and the nitrofurans are hydrolyzed to 5-nitrofuraldehyde in aqueous acid at 70 degrees C. The hydrolysis product is extracted with benzene and measured by gas-liquid chromatography with electron capture detection. Recoveries of nitrofurazone and furazolidone from fortified poultry and swine tissues at the levels of 0.5 and 0.1 ppm are 75 and 65%, respectively. This procedure can be used to detect the total nitrofuran content of as little as 10 ppb muscle tissues and milk, 100 ppb liver, and 50 ppb fat with no interference from related veterinary nitrodrugs.

Adipose Tissue↗
PubMed1975

[Joint action of nitrofuran preparations and bile acids on bacteria of the genus Proteus].

Sensitivity of 25 fresh isolates of Proteus to some nitrofuran drugs most widely used in the clinical practice, such as furacillin, furagin, furazolidone and nitrofurantoin was studied. When the drugs were used in combination with some bile acids, i.e. desoxycholic, dehydrocholic, cholic and glycocholic acids, significant in vitro potentiation of the antibacterial activity of the nitrofurans against the isolates was observed. The combinations of the drugs with desoxycholic acid proved to be most effective. In the presence of this acid the bacteriostatic dose of the drugs decreased several thousand times. Combination of the nitrofurans with the other acids resulted in an increase in the antimicrobial activity amounting to several hundred times. The combinations of the drugs with the bile acids had not only bacteriostatic but also bactericidal effect.

Bile Acids and Salts↗
PubMed2002

[Fromilid (clarithromycin) in eradication patients in patients with duodenal ulcer associated with Helicobacter pylori (comparison of two treatment variations)].

AIM: Comparison of two treatment regimens of eradication treatment of duodenal ulcer (DU) associated with Helicobacter pylori based on fromilid (clarithromycin). MATERIAL AND METHODS: 20 DU patients associated with HP were divided into two groups. 10 patients of group 1 received omeprazol, fromilid and metronidazol and 10 patients of group 2 were given omeprazol, fromilid and furasolidon for 7 days followed by 2-week omeprazol alone. The patients were examined clinically and endoscopically; HP were detected with a fast urease test and polymerase chain reaction before and after the treatment. Control examinations were performed 6 weeks after the medication. RESULTS: In group 1 duodenal healing was observed in all the 10 patients, HP eradication occurred in 9 of 10 patients by urease test and in 4 patients by PCR, in group 2 in 8 of 10, 10 of 10 and 10 of 10, respectively. CONCLUSION: Fromilid (clarithromycin) is effective in eradication treatment in combination with fromilid and metronidazol or furazolidon.

Adolescent↗
PubMedDate not supplied

Stability of sulfonamides, nitrofurans, and chloramphenicol residues in preserved raw milk samples measured by liquid chromatography.

A stability study was made of 10 antimicrobials: 6 sulfonamides, 3 nitrofurans, and chloramphenicol residues in raw milk samples preserved with 0.1 % potassium dichromate (K2Cr2O7) and 0.05% mercuric bichloride (HgCl2) during cold storage for 7 days. Preserved milk samples fortified with 50 ppb of each antimicrobial were analyzed by liquid chromatography (modified AOAC Method 993.32). Drugs were extracted with chloroform-acetone after solvent evaporation residues were dissolved with aqueous sodium acetate buffer solution (0.02M, pH 4.8), and fat was removed with hexane. Sulfonamides and chloramphenicol were detected at 275 nm (UV) by using a gradient system of sodium acetate buffer solution-acetonitrile starting at 95 + 5 (v/v) and finishing at 80 + 20 (v/v). Nitrofurans were detected at 375 nm (UV) isocratically with sodium acetate buffer solution-acetonitrile (80 + 20, v/v). Residues stability was measured through recovery data. Sulfamethoxazole, sulfachloropyridazine, nitrofurazone, furazolidone, and furaltadone residues remained stable in the presence of either preservative for 7 days. Sulfamethazine and chloramphenicol were not affected by K2Cr2O7, but had significant losses (p <0.05) when HgCl2 was used: 26.2 and 13.4%, respectively. Average recoveries of sulfamonomethoxine, sulfamerazine, and sulfathiazole significantly decreased by Day 7, with losses of 17.1, 17.2, and 23.2% for K2Cr2O7, and 23.3, 20.7, and 48.0% for HgCl2, respectively. During 5 days of cold storage all antimicrobials tested, except sulfathiazole, remained stable in milk samples preserved with 0.1 % K2Cr2O7 or 0.05% HgCl2.

Animals↗
PubMed1992

Occurrence of multi-drug resistant Salmonella typhi in Calcutta.

Blood and faecal samples were collected from 122 hospitalised patients of Calcútta clinically suspected to have enteric fever, for isolation of S. typhi. It was isolated from 34.4, 4.9 and 4.1 per cent patients by blood culture, stool culture and by both respectively. The in vitro drug susceptibility testing showed that all the isolates were resistant to chloramphenicol, ampicillin and trimethoprim-sulphamethoxazole, but were uniformly susceptible to ciprofloxacin, norfloxacin and furazolidone. In view of the appearance of multi-drug resistant S. typhi in Calcutta, great care should be exercised in the use of newer quinolone derivatives.

Anti-Bacterial Agents↗
PubMed1992

[Pleiotropic nature of mutation of resistance to 2,3,5-triphenyl- tetrazolium chloride of Francisella tularensis].

Natural strains of F. tularensis were characterized by sensitivity to 2,3,5-triphenyl tetrazolium chloride (TTC). Development of TTC resistance in the cells of F. tularensis was accompanied by changes in the biological properties of the culture, i.e. the colony morphology, antigenic structure, virulence and immunogenicity for laboratory animals. Moreover, there was a direct correlation between the levels of TTC resistance and resistance to chloramphenicol, erythromycin, tetracycline, furazolidone and rifampicin. The antibiotic resistant mutants of F. tularensis were in turn more resistant to TTC than the initial strains. This could be useful in isolation of polymarked strains of F. tularensis for genetic studies and investigation of the nature of the phenomenon of virulence in F. tularensis.

Animals↗
PubMed2002

Serotypic and antibiotic susceptibility pattern of Salmonella species isolated from cases of gastroenteritis at Infectious Diseases Hospital (IDH), Delhi from 1997-2000.

A total number of 11,551 stool samples/rectal swabs obtained from acute gastroenteritis cases admitted at Infectious Diseases Hospital (IDH), Delhi during a period of four years from 1997-2000 were processed at National Institute of Communicable Diseases (NICD), Delhi to look for the presence of enteropathogens. One hundred twelve Salmonellae species belonging to different serotypes were isolated. The commonest species was S. typhimurium, accounting for 31% of isolates, followed by S. weltervreden (19%), S. litchfield (15%) and others. 61% of S. typhimurium isolates depicted multidrug resistance to Chloramphenicol, Tetracycline, Furazolidone and Co-trimoxazole. However, none showed resistance to quinolones and third generation cephalosporins. Estimation of minimum inhibitory concentration (MIC) for S. typhimurium against Ampicillin, Chloramphenicol and Cephalothin was carried out by E test. A good correlation between disc diffusion technique and E test was observed.

Adolescent↗
PubMed1992

Demonstration of Clostridium septicum infection in a goose flock.

Clostridium septicum infection causing 5.0 to 5.2% mortality is reported for the first time in the literature from six-week-old growing geese in three flocks comprising 5,200, 5,500 and 5,900 geese, respectively. The affected birds exhibited weakness, uncoordinated movement, ataxia and, frequently, oblique position of the head and neck (torticollis) as well as signs indicative of dysequilibrium. The affected birds died within 18-24 h. Gross pathological examination revealed anaemia, hepatitis with map-like necroses of irregular outline (Fig. 1), acute enteritis, pulmonary oedema and cardiac dilatation. Light and electron-microscopic examination showed that the sinusoids of the liver were markedly dilated (Fig. 2) and filled with serous exudate and gas (Figs 2 and 3), and the hepatocytes surrounding them exhibited severe oedema (Fig. 4). Among the hepatocytes, ciliated bacteria 7-10 mu in length and 1-3 mu in width, bounded by a well-defined cell wall and often showing signs of spore formation were observed (Figs 5 and 6). By bacteriological examination the pathogen was isolated, its properties were studied, and the clinical entity of malignant oedema was experimentally reproduced by intramuscular injection of guinea-pigs and rabbits. The applied antibiotic (oxytetracycline) and furazolidone therapy proved effective.

Animals↗
PubMed1992

[Occurrence and drug resistance of bacteria pathogenic to the lungs from autopsy material of swine].

Eight hundred and fifty-four piglets which died or were euthanized due to pneumonia or rhinitis atrophicans, were investigated during the period of 1986-1990. Of the animals, 569 showed bronchopneumonia, 218 had pleuritis, pericarditis and peritonitis, 165 had rhinitis atrophicans, 58 pleuropneumonia, and 9 animals had fibrinous pneumonia. Pasteurella multocida, Haemophilus parasuis, Bordetella bronchiseptica, Actinobacillus pleuropneumoniae and Pasteurella haemolytica were isolated in 59.1%, 29.5%, 27.8%, 3.7%, and 2.3% cases of bronchopneumonia respectively. Samples from pigs with pleuritis or rhinitis atrophicans showed Pasteurella multocida in 63.8 and 68.5%, Bordetella bronchiseptica in 28.4 and 39.4%, streptococci in 28.9 and 3.9%, Haemophilus parasuis in 25.2% and 20.6%, Actinobacillus pleuropneumoniae in 5.1 and 5.5%, and Pasteurella haemolytica in 3.2 and 3.0%, respectively Actinobacillus pleuropneumoniae was found in 51 of 58 cases of pleuropneumonia and in 5 of 9 cases of fibrinous pneumonia; 55.6% and 44.4% respectively of those forms of pneumonia were positive for Pasteurella multocida. In the agar diffusion test, 36.8-82.6% of bacterial isolates showed resistance to streptomycin, 7.7-45.5% to sulfamethoxazole-trimethoprim, 5.7-44.6% to tetracycline, 0.2-32.8% to ampicillin, 0.0-16.3% to lincospectin, 2.0-81.2% to furazolidone, 0.4-4.5% to chloramphenicol, 1.3-78.1% to penicillin and 0-0.3% to enrofloxacin.

Animals↗