Evidence map›Paper›PMID 8417034›Full record

ArticleJournal of clinical microbiology1993

Detection of Mycobacterium tuberculosis in clinical samples by two-step polymerase chain reaction and nonisotopic hybridization methods.

R M Shawar, F A el-Zaatari, A Nataraj, J E Clarridge

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Journal of clinical microbiology, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
17.6field-weighted citation impact, top 1% of its field
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

41 citing papers in PubMed, 115 citations in OpenAlex.

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  8. Assessment of the quality of dna extracted by two techniques from Mycobacterium tuberculosis for fast molecular identification and genotyping.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2011
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  11. Use of multiepitope polyproteins in serodiagnosis of active tuberculosis.Clinical and diagnostic laboratory immunology · 2002
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  12. Article
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  16. Absence of the genetic marker IS6110 from a strain of Mycobacterium tuberculosis isolated in Ontario.The Canadian journal of infectious diseases = Journal canadien des maladies infectieuses · 1998
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  18. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

R M ShawarDepartment of Pathology, Baylor College of Medicine, Houston, Texas.
F A el-Zaatari
A Nataraj
J E Clarridge
Baylor College of Medicine · US

Funding

PHS HHS U52/CCU606005-01
6 · The paper itself

Abstract

Detection of Mycobacterium tuberculosis in clinical specimens by the polymerase chain reaction (PCR) was compared with detection by culture. A 317-bp segment within the M. tuberculosis-specific insertion sequence IS6110 was amplified. The detection limit of the PCR assay for cultured mycobacteria was 50 cells per reaction by ethidium bromide-stained agarose gel electrophoresis and 5 cells per reaction by hybridization with an oligonucleotide probe conjugated with either digoxigenin or alkaline phosphatase (AP). This sensitivity was reduced fivefold in sputum specimens seeded with M. tuberculosis. Seventy-six clinical specimens were amplified and examined by the three detection methods. Both the digoxigenin and AP procedures were found to be more sensitive than agarose gel electrophoresis, but they were occasionally associated with a high background. An additional 308 specimens were examined only by agarose gel electrophoresis and the AP procedure. Of 71 specimens found to contain M. tuberculosis, amplified products were detected from 56 (79%) samples by agarose gel electrophoresis and/or the AP procedure. Of the additional 313 specimens that were culture negative for M. tuberculosis, 19 (6%) had amplified products detectable by agarose gel electrophoresis and/or the AP procedure. Compared with culture, PCR showed sensitivities and specificities of 55 and 98%, respectively, for agarose gel electrophoresis and 74 and 95%, respectively, for the AP procedure. Despite this low sensitivity, a rapid positive PCR result was accurate and clinically useful.

Indexed as

Alkaline PhosphataseBase SequenceBlotting, SouthernColony Count, MicrobialDigoxigeninDNA, BacterialElectrophoresis, Agar GelFalse Positive ReactionsHumansMolecular Sequence DataMycobacterium tuberculosisNucleic Acid HybridizationOligonucleotide ProbesPolymerase Chain ReactionSensitivity and SpecificitySputumAlkaline PhosphataseDigoxigeninDNA, BacterialOligonucleotide Probes

Identifiers

PMID8417034
PMCPMC262622
OpenAlexW1632490965

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.