Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0519030 (Klebsiella)
 21,988 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Antimicrobial activity of 2-(2-hydroxyphenyl)-5-R5-1H-benzimidazoles, 2-(2-hydroxy-5-R5'-phenyl)-1H-benzimidazoles and their FeIII, CuII, AgI, ZnII and HgII nitrate complexes was tested toward Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Shigella flexneri, and Proteus mirabilis. Antifungal activity was tested against Candida albicans. Benzimidazole benzene ring substituents increase the antimicrobial activity, phenol ring substituents decrease it. The ligands show an antibacterial effect against only S. aureus whereas AgI and HgII complexes of the ligands have a higher activity with respect to the other complexes to all the bacteria. On the other hand, FeIII complexes show a considerable activity against S. aureus and S. epidermidis.
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PMID:Antimicrobial activity of FeIII, CuII, AgI, ZnII and HgII complexes of 2-(2-hydroxy-5-bromo/nitro-phenyl)-1H- and 2-(2-hydroxyphenyl)-5-methyl/chloro/nitro-1H-benzimidazoles. 1250 91

[2-[2-(N, N-Disubstituted thiocarbamoyl-sulfanyl)acylamino ]thiazol-4-yl]acetic acid ethyl esters (3a-x) were synthesized by the reaction of potassium salts of N, N-disubstituted dithiocarbamoic acids with [2-(2-chloroalkanoyl)amino-thiazol-4-yl]acetic acid ethyl esters. The structures of the synthesized compounds were confirmed by elemental analyses, UV, IR, (1)H-NMR, and EI mass spectral data. The antimicrobial activities of all the compounds were investigated by microbroth dilution technique using Mueller-Hinton broth and Mueller-Hinton agar. In this study, Staphylococcus aureus ATCC 6538, Staphylococcus epidermidis ATCC 12228, Escherichia coli ATCC 8739, Klebsiella pneumoniae ATCC 4352, Pseudomonas aeruginosa AT CC 1539, Salmonella typhi, Shigella flexneri, Proteus mirabilis ATCC 14153 and Candida albicans ATCC10231 were used as test microorganisms. Among the tested compounds 3a, d, e, f, h, k, w activity against S. epidermidis ATCC 12228 (MIC: 156 mg/L, 78 mg/L, 62.5 mg/L, 78 mg/L, 62.5 mg/L, 312 mg/L, 250 mg/L, respectively), compound 3d had some activity against S. aureus ATCC 6538 (MIC: 156 mg/L) and C. albicans ATCC 10231(MIC: 156 mg/L). Compounds 3l, 3x also evaluated for antituberculosis activity against Mycobacterium tuberculosis H37Rv using the BACTEC 460 radiometric system and BACTEC 12B medium. The preliminary results indicated that all of the tested compounds were inactive against the test organism.
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PMID:Synthesis and antimicrobial activity of [2-[2-(N, N-disubstituted thiocarbamoyl-sulfanyl)-acylamino] thiazol-4-yl]acetic acid ethyl esters. 1266 52

Lom-AKH-I enhances the activation in vivo of prophenoloxidase in the haemolymph of the African migratory locust, Locusta migratoria, in response to challenge with laminarin. AKH does not influence the speed or initial magnitude of the phenoloxidase response to laminarin, but prolongs the period of activation of the enzyme in a dose-dependent manner. Injections of preparations of bacterial lipopolysaccharide (LPS) do not activate prophenoloxidase in vivo, but co-injection of Lom-AKH-I with commercial preparations of LPS from Klebsiella pneumoniae, Escherichia coli, or Shigella flexneri (but not one from Pseudomonas aeroginosa) results in dose-dependent increases in the levels of phenoloxidase that persist in the haemolymph for several hours. It is argued that the effects of AKH on phenoloxidase activation in locusts described here are, at least in part, related directly to changes in lipid metabolism brought about by the hormone.
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PMID:Adipokinetic hormone enhances laminarin and bacterial lipopolysaccharide-induced activation of the prophenoloxidase cascade in the African migratory locust, Locusta migratoria. 1277 71

Three strains of Escherichia fergusonii (EF873, EF1496, EF939) of 50 strains tested produced the hydroxamate siderophore aerobactin. Screening of a cosmid library of the strain EF873 chromosomal DNA (in aerobactin nonproducing Escherichia coli VCS257) for aerobactin production identified iucABCD and iutA gene orthologues. The predicted IucABCD and IutA proteins showed 59-65% identity to the corresponding proteins of Shigella flexneri and E. coli. Aerobactin molecules synthesized by E. fergusonii and E. coli strains stimulated growth of aerobactin indicator strains harboring either E. coli or E. fergusonii iutA genes. In the 12 kb upstream and 17 kb downstream regions of the iuc and iut genes, 20 additional ORFs were identified. Their gene products showed homology to proteins from E. coli, S. flexneri, Klebsiella aerogenes, Pseudomonas aeruginosa and Vibrio cholerae. Probes recognizing DNA sequences from a region of more than 25 kb, which included the iucABCD and iutA genes, hybridized with chromosomal DNA of two aerobactin-producing strains (EF873 and EF939), but not with other nonproducing E. fergusonii strains tested. These data, together with the genetic organization of this region, suggest that E. fergusonii iucABCD iutA genes are a portion of a larger segment of DNA similar to pathogenicity islands of other bacteria.
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PMID:The Escherichia fergusonii iucABCD iutA genes are located within a larger chromosomal region similar to pathogenicity Islands. 1280 Apr 94

The relationship between the presence, or the absence, of conjugative plasmid pR50 detected in Klebsiella oxytoca 89, in the isogenic pairs of attenuated strains Shigella flexneri 2a 516 Near and Salmonella typhimurium 129 Rifr and the regeneration of the active forms of oxygen by mouse peritoneal phagocytizing cells was studied. As indicated by the data obtained in the course of the experiment, plasmids pR50 could influence the chemiluminescent response of phagocytes. The inhibition of the synthesis of oxygen metabolites was found to occur at the primary stage of the infectious process, that later this synthesis increased, that facilitated the survival of the animals infected with the cultures carrying plasmid pR50.
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PMID:[Alteration of phagocyte functional activity depending on the presence of pR50 plasmid in bacteria]. 1288 22

The effect of the synthetic immunomodulator polyoxydonium (PO) on some biological properties of pathogenic bacteria (Shigella flexneri, Salmonella enteritidis), opportunistic bacteria (Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacteroides fragilis, Peptostreptococcus anaerobius, Prevotella melaninogenica, Propionibacterium propionicum, Clostridium difficile) and fungi (Candida albicans), isolated during enteric infections, enteric dysbiosis, pyoinflammatory diseases, was evaluated in a number of in vitro experiments. The study revealed that the recommended therapeutic concentration of PO decreased antilysozyme activity (ALA) and the anticomplement activity in Klebsiella, Shigella, Propionibacterium, Clostridium, bacteroids, fungi of the genus Candida, but increased ALA in nonhemolytic Escherichia. Under the action of PO an increased sensitivity of the microorganisms under study to definite antibiotics of the lincosamide, fluoroquinolon, carbapenem and cephalosporin groups was noted. The data obtained in this study reveal one of the possible mechanisms of the corrective action of PO on the microbiocenosis of the intestine in dysbiosis, enteric infections and pyoinflammatory diseases.
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PMID:[Effect of a polyoxydonium immunoregulator on the biological properties of microorganisms]. 1296 85

Hentges, David J. (Loyola University, Chicago, Ill.), and MacDonald Fulton. Ecological factors influencing the relationships between Klebsiella and Shigella in mixed cultures. J. Bacteriol. 87:527-535. 1964.-Viable-cell counts of Shigella flexneri and Klebsiella (Aerobacter aerogenes) in pure and mixed culture were made during growth under predetermined conditions of temperature, pH, oxygen supply, and nutrient supply. In pure culture, environmental changes had marked effects on the Shigella populations. Klebsiella populations were not affected except at 44 C or when aerated; under these conditions, the populations were smaller. In nonaerated mixed culture, under different conditions of temperature, pH, and nutrient supply, Klebsiella interfered with the multiplication of Shigella. Exponential growth of Shigella was interrupted at about the time Klebsiella populations attained a maximal size. In contrast, the presence of Klebsiella in an aerated mixture had little or no effect on Shigella multiplication because Klebsiella failed to attain a maximal population. Different environmental conditions resulted in different Klebsiella to Shigella ratios in mixed cultures. When conditions were favorable for Shigella multiplication, as shown by pure culture controls, the proportion of Shigella in the mixture was generally greater than when conditions were unfavorable.
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PMID:ECOLOGICAL FACTORS INFLUENCING THE RELATIONSHIPS BETWEEN KLEBSIELLA AND SHIGELLA IN MIXED CULTURE. 1412 67

2-(2-Pyridinyl)- (LI), 2-(6-methyl-2-pyridinyl)- (LII), 2-(6-methyl-2-pyridinyl)-5-methyl-(LIII), 2-(3-pyridinyl)- (LIV), 2-(3-pyridinyl)-5-methyl-1H-benzimidazoles (LV) and their complexes with Fe(NO3)3, Cu(NO3)2, Zn(NO3)2, and AgNO3 were synthesized and antibacterial activity of the compounds was tested toward Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Shigella flexneri, Proteus mirabilis and antifungal activity against Candida albicans. The methyl groups of LIII increase the antimicrobial activity. The AgI complexes have considerable activity toward the microorganisms. Some ZnII complexes show an antimicrobial effect against S. aureus and S. flexneri, although the ligands themselves have no effect. CuII complexes have a considerable antibacterial effect to S. aureus and S. epidermidis.
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PMID:Antimicrobial activity of some 2- and 3-pyridinyl-1H-benzimidazoles and their FeIII, CuII, ZnII, and AgI complexes. 1453 78

In this study, 14 new compounds having 6-methyl-N2-(alkylidene/cycloalkylidene)imidazo[2,1-b]thiazole-5-carbohydrazide (3a-g), 3-[[(6-methylimidazo[2,1-b]thiazole-5-yl)carbonyl]amino]-4-thiazolidinone (4a-d) and 4-[[(6-methylimidazo[2,1-b]thiazole-5-yl)carbonyl]amino]-1-thia-4-azaspiro[4.4]nonan/[4.5]decan-3-one (4e-g) structures were synthesized. The structures of the compounds were elucidated by UV, IR, 1H-NMR, 13C-NMR, 1H-13C-COSY, mass spectra and elemental analysis. All compounds synthesized were tested for antimicrobial activity against Staphylococcus aureus ATCC 6538, Staphylococcus epidermidis ATCC 12228, Escherichia coli ATCC 8739, Klebsiella pneumoniae ATCC 4352, Pseudomonas aeruginosa ATCC 1539, Salmonella typhi, Shigella flexneri, Proteus mirabilis ATCC 14153, Candida albicans ATCC 10231 and Mycobacterium tuberculosis H37Rv. Only 4d and 4f demonstrated antimicrobial activity against S. epidermidis ATCC 12228 (MIC: 19.5 microg/ml and 39 microg/ml, respectively).
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PMID:Synthesis of some new 6-methylimidazo[2,1-b]thiazole-5-carbohydrazide derivatives and their antimicrobial activities. 1503 63

Validation of a PCR test to detect hilA gene sequences of Salmonella spp. was performed in blood and faeces samples from typhoid fever and salmonellosis patients. Sensitivity (S), specificity (SP), positive predictive value (PPV) and negative predictive value (NPV) of the PCR in blood samples were performed by testing: 37 patients with clinical diagnosis of typhoid fever, 34 of them confirmed by isolation of S. Typhi from blood cultures; 35 patients infected with other pathogens corroborated by blood culture (Klebsiella pneumoniae, 9; Serratia marcescens, 5; Escherichia coli, 4; Pseudomonas aeruginosa, 9; Providencia alcalifaciens, 4 and Enterobacter cloacae, 4) and blood samples from 150 healthy volunteers. To evaluate S, SP, PPV and NPV of the PCR in faeces samples we studied: 34 patients with enteritis due Salmonella spp. (S. Typhimurium, 21; S. Enteritidis, 9; S. Choleraesuis, 3 and S. Agona, 1); faeces samples from 35 patients with enteric infection due to Shigella sonnei (8), Shigella flexneri (10), enteropathogenic E. coli (12), Aeromonas hydrophila (5) and faeces samples from 150 healthy volunteers. The S, SP, PPV and NPV of the PCR in blood samples were all 100 %. PCR detected three patients with clinical diagnosis of typhoid fever and negative blood cultures. In faeces samples, S was 97 %, SP 100 %, PPV 100 % and NPV 99 %. The lowest number of c.f.u. ml(-1) detected by PCR in blood samples was 1 x 10(1) and in faeces samples 4 x 10(2).
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PMID:Validation of a PCR for diagnosis of typhoid fever and salmonellosis by amplification of the hilA gene in clinical samples from Colombian patients. 1531 94


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