Cargando…

Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme

The Irish Bovine Tuberculosis (bTB) eradication programme operates under national legislation and fulfills OIE and EU trade requirements. Tuberculin purified protein derivative (PPD), a preparation obtained from the heat-treated products of growth and lysis of Mycobacterium bovis or Mycobacterium av...

Descripción completa

Detalles Bibliográficos
Autores principales: Duignan, Anthony, Kenny, Kevin, Bakker, Douwe, Good, Margaret
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6779688/
https://www.ncbi.nlm.nih.gov/pubmed/31632988
http://dx.doi.org/10.3389/fvets.2019.00328
_version_ 1783456946416779264
author Duignan, Anthony
Kenny, Kevin
Bakker, Douwe
Good, Margaret
author_facet Duignan, Anthony
Kenny, Kevin
Bakker, Douwe
Good, Margaret
author_sort Duignan, Anthony
collection PubMed
description The Irish Bovine Tuberculosis (bTB) eradication programme operates under national legislation and fulfills OIE and EU trade requirements. Tuberculin purified protein derivative (PPD), a preparation obtained from the heat-treated products of growth and lysis of Mycobacterium bovis or Mycobacterium avium (as appropriate), is critical to the diagnosis of tuberculosis (TB). Standardization of Tuberculin PPD potency, the relative activity in sensitized animals compared to a reference standard, is essential to underpin the reliability of certification for international trade and to ensure that disease eradication programmes are effective and efficient. A Bovine International Standard Tuberculin PPD (BIS) was established by the WHO in 1986 and is used to determine comparative potencies of Tuberculin PPDs. Ideally, Tuberculin PPD potency should be evaluated in the species in which the tuberculin will be used but due to practical difficulties in performing potency assays in cattle, for routine PPD production, they are usually assayed in guinea pigs. Low potency tuberculin PPD is less efficient and thus inferior for bTB diagnosis. Difficulties experienced in the Irish bTB eradication programme have included the supply of sub-standard potency, and thus inferior, bovine (M. bovis) Tuberculin PPD in the late 1970s. The purpose of this paper is to outline the critical role of Tuberculin PPD assays carried out on naturally infected tuberculous cattle, as required by the OIE and under EU legislation in the quality control for the Irish Bovine Eradication Programme. Such assays ensure that the Tuberculin PPD used meets the diagnostic sensitivity and specificity requirements to underpin a successful national eradication programme.
format Online
Article
Text
id pubmed-6779688
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-67796882019-10-18 Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme Duignan, Anthony Kenny, Kevin Bakker, Douwe Good, Margaret Front Vet Sci Veterinary Science The Irish Bovine Tuberculosis (bTB) eradication programme operates under national legislation and fulfills OIE and EU trade requirements. Tuberculin purified protein derivative (PPD), a preparation obtained from the heat-treated products of growth and lysis of Mycobacterium bovis or Mycobacterium avium (as appropriate), is critical to the diagnosis of tuberculosis (TB). Standardization of Tuberculin PPD potency, the relative activity in sensitized animals compared to a reference standard, is essential to underpin the reliability of certification for international trade and to ensure that disease eradication programmes are effective and efficient. A Bovine International Standard Tuberculin PPD (BIS) was established by the WHO in 1986 and is used to determine comparative potencies of Tuberculin PPDs. Ideally, Tuberculin PPD potency should be evaluated in the species in which the tuberculin will be used but due to practical difficulties in performing potency assays in cattle, for routine PPD production, they are usually assayed in guinea pigs. Low potency tuberculin PPD is less efficient and thus inferior for bTB diagnosis. Difficulties experienced in the Irish bTB eradication programme have included the supply of sub-standard potency, and thus inferior, bovine (M. bovis) Tuberculin PPD in the late 1970s. The purpose of this paper is to outline the critical role of Tuberculin PPD assays carried out on naturally infected tuberculous cattle, as required by the OIE and under EU legislation in the quality control for the Irish Bovine Eradication Programme. Such assays ensure that the Tuberculin PPD used meets the diagnostic sensitivity and specificity requirements to underpin a successful national eradication programme. Frontiers Media S.A. 2019-10-01 /pmc/articles/PMC6779688/ /pubmed/31632988 http://dx.doi.org/10.3389/fvets.2019.00328 Text en Copyright © 2019 Duignan, Kenny, Bakker and Good. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Veterinary Science
Duignan, Anthony
Kenny, Kevin
Bakker, Douwe
Good, Margaret
Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title_full Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title_fullStr Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title_full_unstemmed Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title_short Tuberculin PPD Potency Assays in Naturally Infected Tuberculous Cattle as a Quality Control Measure in the Irish Bovine Tuberculosis Eradication Programme
title_sort tuberculin ppd potency assays in naturally infected tuberculous cattle as a quality control measure in the irish bovine tuberculosis eradication programme
topic Veterinary Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6779688/
https://www.ncbi.nlm.nih.gov/pubmed/31632988
http://dx.doi.org/10.3389/fvets.2019.00328
work_keys_str_mv AT duignananthony tuberculinppdpotencyassaysinnaturallyinfectedtuberculouscattleasaqualitycontrolmeasureintheirishbovinetuberculosiseradicationprogramme
AT kennykevin tuberculinppdpotencyassaysinnaturallyinfectedtuberculouscattleasaqualitycontrolmeasureintheirishbovinetuberculosiseradicationprogramme
AT bakkerdouwe tuberculinppdpotencyassaysinnaturallyinfectedtuberculouscattleasaqualitycontrolmeasureintheirishbovinetuberculosiseradicationprogramme
AT goodmargaret tuberculinppdpotencyassaysinnaturallyinfectedtuberculouscattleasaqualitycontrolmeasureintheirishbovinetuberculosiseradicationprogramme