Evidence map›Paper›PMID 9023948›Full record

ArticleApplied and environmental microbiology1997

Detection system for Escherichia coli-specific virulence genes: absence of virulence determinants in B and C strains.

P Kuhnert, J Hacker, I Mühldorfer, A P Burnens, J Nicolet, J Frey

Abstract readComparative Study
In one paragraph

Article in Applied and environmental microbiology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed.

  1. Article
  2. Purification of Antibacterial CHAPProbiotics and antimicrobial proteins · 2016
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  5. The high prevalence of serine protease autotransporters of Enterobacteriaceae (SPATEs) in Escherichia coli causing neonatal septicemia.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2014
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

P KuhnertInstitute of Veterinary Bacteriology, University of Bern, Switzerland. Kuhnert@vbi.unibe.ch
J Hacker
I Mühldorfer
A P Burnens
J Nicolet
J Frey

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We describe a rational approach to simultaneously test Escherichia coli strains for the presence of known virulence genes in a reverse dot blot procedure. Specific segments of virulence genes of E. coli designed to have similar hybridization parameters were subcloned on plasmids and subsequently amplified by PCR as unlabeled probes in amounts sufficient to be bound to nylon membranes. Various pathogenic isolates and laboratory strains of E. coli were probed for the presence of virulence genes by labeling the genomic DNA of these strains with digoxigenin and then hybridizing them to the prepared nylon membranes. These hybridization results demonstrated that besides the E. coli K-12 safety strain derivatives, E. coli B and C strains are also devoid of genes encoding any of the investigated virulence factors. In contrast, pathogenic E. coli control strains, used to evaluate the method, showed typical hybridization patterns. The described probes and their easy application on a single filter were shown to provide a useful tool for the safety assessment of E. coli strains to be used as hosts in biotechnological processes. This approach might also be used for the identification and characterization of clinically significant E. coli isolates from human and animal species.

Indexed as

Bacterial Typing TechniquesGenes, BacterialNucleic Acid HybridizationCloning, MolecularDNA PrimersEscherichia coliOligonucleotide ProbesPolymerase Chain ReactionSequence Analysis, DNAVirulenceDNA PrimersOligonucleotide Probes

Identifiers

PMID9023948
PMCPMC168360

What OpenQuestion holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.