MétaCan
Menu
← Back to cohort
Record W7045629659

Apport de la Réaction de Polymérisation en Chaîne (PCR) dans le diagnostic de la Tuberculose Cutanée [Contribution of Polymerase Chain Reaction (PCR) in the diagnosis of Cutaneous Tuberculosis}

2024· article· fr· W7045629659 on OpenAlexaff

Bibliographic record

VenueDOAJ (DOAJ: Directory of Open Access Journals) · 2024
Typearticle
Languagefr
FieldPhysics and Astronomy
TopicMagnetic confinement fusion research
Canadian institutionsWiLAN (Canada)
Fundersnot available
KeywordsLung diseaseMedical screeningRespiratory diseaseMycobacterium tuberculosisPolymerase chain reaction
DOInot available

Abstract

fetched live from OpenAlex

Résumé Introduction - La tuberculose représente toujours un problème de santé publique. Le polymorphisme anatomo-clinique, la multiplicité des diagnostics différentiels et l’isolement inconstant des mycobactéries rendent souvent difficile le diagnostic de la localisation cutanée de cette maladie infectieuse. L’objectif de cette étude est d’évaluer l’apport de la réaction de polymérisation en chaîne (PCR) dans le diagnostic de la tuberculose cutanée en la comparant avec les autres techniques à savoir la culture sur milieu solide et l’étude histologique Matériels et méthodes - Il s’agit d’une étude d’observation multicentrique incluant 46patients recrutés au niveau de différents services de dermatologie d’Oran, de Tlemcen et d’Alger. Ces patients présentent une tuberculose cutanée évolutive fortement suspectée associée ou non à une localisation extra cutanée et n’ont jamais reçu de traitement antituberculeux. Le test diagnostique utilisé est l’Xpert® MTB/RIF. Il porte sur des fragments biopsiques des lésions cutanées et du pus quand celui-ci existe. L’analyse statistique a été réalisée grâce au logiciel Epi Data 3.1. Une comparaison des résultats obtenus avec l’Xpert® MTB/RIF, la culture sur milieu solide et l’histologie avec ceux retrouvés dans d’autres études ayant utilisé une PCR classique, a été établie. Résultats - La comparaison des résultats obtenus avec l’Xpert® MTB/RIF et ceux de la culture a montré d’une façon globale, une sensibilité de 71,5%, une spécificité de 100%, une Valeur Prédictive Positive de 100% et une Valeur Prédictive Négative de 88,9% (p<0,001). La comparaison des résultats obtenus avec l’Xpert® MTB/RIF et ceux de l’histologie, a estimé une sensibilité à 20,5%, une spécificité à 71,4%, une valeur prédictive positive à 81,2% et une valeur prédictive négative à 13,9% (p=0,63). Conclusion - Dans le diagnostic de la tuberculose cutanée, la sensibilité de l’Xpert® MTB/RIF s’avère moindre par rapport à celle de la culture et à celle de l’histologie. Les seuls avantages sont la rapidité des résultats et sa bonne spécificité. Abstract Introduction - Tuberculosis is still a public health problem. The anatomo-clinical polymorphism, the multiplicity of differential diagnoses and the fickle isolation of mycobacteria often make it difficult to diagnose the cutaneous localization of this infectious disease. The objective of this study is to evaluate the contribution of the polymerase chain reaction (PCR) in the diagnosis of cutaneous tuberculosis by comparing it with the other techniques wich are culture on solid medium and the histological study. Materials and methods -This is amulticenter observational studyincluding 46 patients recruited from different dermatology departments in Oran, Tlemcen and Algiers. These patients present a strongly suspected active cutaneous tuberculosis with or without an extra-cutaneous localization and have never received antituberculous treatment. The diagnostic test used isXpert® MTB / RIF for biopsy fragments of cutaneous lesions and pus when it exists. Statistical analysis was performed usingEpi Data 3.1 software.A comparison of the results of the polymerase chain reaction (PCR), culture and histology with those found in other studies using conventional PCR has been established. Results - The comparison of the PCR and the culture results showed in a global way, a sensitivity of 71.5%, a specificity of 100%, a Positive Predictive Value of 100% and a Negative Predictive Value of 88.9% (p<0.001). Comparison of results obtained with Xpert® MTB / RIF and those of histology, estimated sensitivity at 20.5%, specificity at 71.4%, positive predictive value at 81.2% and a value of predictive negative at 13.9% (p = 0.63). Conclusion - The sensitivity of Xpert® MTB / RIF is lower than that of culture and that of histology for the diagnosis of cutaneous tuberculosis. However, Xpert® MTB / RIF has a better specificity and shorter lead times for obtaining results.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.003
metaresearch head score (Gemma)0.005
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.003
Threshold uncertainty score0.017

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0030.005
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0020.001
Science and technology studies0.0000.001
Scholarly communication0.0020.001
Open science0.0010.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0030.002

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.047
GPT teacher head0.458
Teacher spread0.412 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2024
Admission routes1
Has abstractyes

Explore more

Same venueDOAJ (DOAJ: Directory of Open Access Journals)→Same topicMagnetic confinement fusion research→French-language works237,207→