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Antibiotic resistance and siderophores production by clinical Escherichia coli strains

100%
Khazaal M. T., El-Hendawy H. H., Mabrouk M. I., Faraag A. H. I., Bakkar M. R.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
|
2022
|
tom 103
|
nr 2
2

The presence of the ail gene in clinical strains of Yersinia enterocolitica isolated from stools in Poland and characteristics of gene variant

86%
Gierczynski R., Jagielski M., Rastawicki W.
Acta Microbiologica Polonica
|
2001
|
tom 50
|
nr 1
3

Staphylokinase production by clinical Staphylococcus aureus strains

86%
Wieckowska-Szakiel M., Sadowska B., Rozalska B.
Polish Journal of Microbiology
|
2007
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tom 56
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nr 2
One of virulence factors produced by Staphylococcus aureus is staphylokinase (SAK), which enhances their proteolytic activity leading to tissue damage and improving bacterial invasiveness. In the present study we estimated the ability to produce staphylokinase by 95 S. aureus reference strains and clinical isolates from the airways of cystic fibrosis patients, from skin lesions and from infected bones. We would like to verify any relationship between SAK production and the types of clinical isolates as well as other biochemical properties and activities of these staphylococcal strains, which can be important for their pathogenicity. More than 62% of all tested strains were able to produce secreted type of SAK. Staphylokinase production was significantly more common in the isolates from skin and soft tissue infections than in any other group of tested staphylococci. The general tendencies in the selected properties or activities of both SAK(-) and SAK(+) isolates were similar. Our data confirm phenotypic dissimilarity in SAK production of S. aureus strains isolated from various types of infections. It is compatible with the biological role of staphylokinase and with hypothetical model of staphylokinase mediated bacterial invasion of host tissues. Thus, the estimation of SAK production by S. aureus isolates may be regarded as the parameter describing potential invasiveness of staphylococci and can be useful as a medical recommendation for the eradication of staphylococci carrier state.
4

Genetic features of clinical Pseudomonas aeruginosa strains

72%
Wolska K., Szweda P.
Polish Journal of Microbiology
|
2009
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tom 58
|
nr 3
255-260
The genetic features of each isolate were determined by enterobacterial repetitive intergenic consensus (ERIC) primer sequences used in PCR and by searching for six virulence genes (alg D, las B, tox A, plc H,plc N, exo S). 49 (79%) of the isolates were distributed in three ERIC PCR subgroups and showed 62% of similarity. The remaining 13 strains generated unique patterns. The first subgroup was primarily composed of isolates from faeces, these strains indicated over 70% relationship with the next subgroup, and primarily contained strains isolated from wounds and bronchial washings and the last subgroup contained strains isolated from wounds and urine. The unique strains were isolated mainly from urine. Statistical analysis indicated that variations in distribution of virulence genes in P. aeruginosa isolates with respect to strain origin and genomic subgroups were not significant. In the group of 49 strains, 100% gave a positive reaction to alg D, las B and plc H genes, 91.8% to tox A and plc N genes and 83.7% to exo S gene. Among the strains that generated unique (ERIC-PCR) patterns, 69.2% gave a positive reaction to alg D gene, 84.6% to las B gene, 76.9% to tox A, plc N and plc H genes, and 46.15% to exo S gene.
5

Characterization and serological classification of a collection of Proteus penneri clinical strains

72%
Drzewiecka D., Zych K., Sidorczyk Z.
Archivum Immunologiae et Therapiae Experimentalis
|
2004
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tom 52
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nr 2
6

A comparative evaluation of PCR ribotyping and ERIC PCR for determining the diversity of clinical Pseudomonas aeruginosa isolates

72%
Wolska K., Szweda P.
Polish Journal of Microbiology
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2008
|
tom 57
|
nr 2
Two typing methods were evaluated, utilizing 62 clinical strains of Pseudomonas aeruginosa, to assess their usefulness as tools to study the bacterial diversity within this complex group. Genetic diversity was determined by PCR ribotyping and enterobacterial repetitive intergenic consensus (ERIC) PCR. By these methods, 9 and 36 genotypes were found, respectively. The result showed that ERIC PCR analysis is a more discriminatory method than PCR ribotyping analysis and traditional serotyping scheme. We suggest that maximum discrimination can be achievied by a combination of these methods.
7

Antimicrobial resistance of Helicobacter pylori clinical strains in the last 10 years

58%
Andrzejewska E., Szkaradkiewicz A., Karpinski T.
Polish Journal of Microbiology
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2009
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tom 58
|
nr 4
301-305
In the present work primary antimicrobial resistance was analyzed in clinical H. pylori strain isolates from adult patients from Polish Wielkopolska region within the last 10 years. Drug sensitivity was evaluated in a total of 142 H. pylori isolates, with 66 strains originating from years 1997/1998 forming group 1 and 76 strains isolated in 2007/2008 forming group 2. Sensitivity to amoxicillin, tetracycline, metronidazole and clarithromycin was determined by E-test. All strains were susceptible to amoxicillin and tetracycline. On the other hand, a high proportion of strains resistant to metronidazole was determined (36.4% in group 1 and 44.7% in group 2). In parallel, a growing tendency was discovered for resistance to clarithromycin (9.1% strains resistant in group 1 and 18.4% isolates resistant in group 2). The studies confirm the need for monitoring the drug resistance of Helicobacter pylori strains.
8

Immunochemical characterization of lipopolysaccharide from glucose-nonfermenting Gram-negative clinical bacterial isolate

58%
Mieszala M., Kubler J., Gamian A.
Acta Biochimica Polonica
|
1997
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tom 44
|
nr 2
A glucose-nonfermenting Gram-negative bacterial strain isolated from bronchofiberoscope used for examination of the patients suffering from pulmonary diseases was subjected to phenol-water extraction. Lipopolysaccharides (LPS) isolated from the water and the phenol phase differed in fatty acid composition. Both contained xylose, glucose, glucosamine and components typical for LPS, namely heptose, 3-deoxyoctulosonic acid (Kdo) and 3-hydroxymyristic acid. The presence of sphingosine in all LPS preparations classifies the strain to the genus Sphingomonas.
9

Identification of Pseudomonas aeruginosa on the basis of polymerase chain reaction - amplified ribosomal DNA spacer polymorphisms

58%
Kur J., Burkiewicz A., Zablocka A., Gospodarek E.
Acta Microbiologica Polonica
|
1995
|
tom 44
|
nr 2
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