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Spoligotyping and VNTR typing of Mycobacterium bovis and Mycobacterium caprae–a review

Poster communication in 33rd Annual Congress of the European Society of Mycobacteriology

July 1st, 2012

Rodriguez-Campos S., Romero B., de Juan L., Casal C., Lozano F., Vinolo C., Mateos A., Aranaz A. and Dominguez L.

Spacer oligonucleotide typing (spoligotyping) and Variable Number Tandem Repeat (VNTR) typing are the most widely used molecular techniques for characterisation of Mycobacterium bovis and M. caprae isolates. Spoligotyping targets the Direct Repeat (DR) region which consists of repeated sequences (DRs) interspersed by polymorphic sequences named spacers whose presence or absence of the spacers can be exploited for strain typing. Although 104 spacer sequences have been identified in the DR region, not all of them show reasonable polymorphism to be used for strain typing; today’s standard protocol for spoligotyping is based on 43 spacers. However, the use of the 43 selected spacers might not be appropriate for M. bovis and M. caprae isolates since these spacers were chosen paying particular attention to discrimination of M. tuberculosis. A solution to this problem could be offered by second-generation spoligotyping membranes that compliment the standard membrane to assess further spacers. The discrimination achieved with spoligotyping varies strongly between different countries, e.g. while large population surveys using spoligotyping in mainland Europe, the usefulness of spoligotyping in the British Isles was found to be limited. VNTR typing aims at genetic loci that are distributed all over the genome; these loci contain variable numbers of repeated sequences. Studies in order to determine an ideal set of VNTR markers for M. bovis/M. caprae are less abundant than studies on M. tuberculosis, nevertheless VNTR typing has been used in many countries for epidemiological studies. In Europe, a group of scientists from laboratories investigating bovine tuberculosis have agreed on a consensus of six VNTR loci for the use with M. bovis/M. caprae (ETR-A, ETR-B, ETR-D, QUB11a, QUB11b and QUB3232). In conclusion, when a set of markers is chosen for typing M. tuberculosis, M. bovis or M. caprae we should take into account that due to interspecies variation it might not offer optimised discrimination




Participants:

Universidad ComplutenseServicio de Micobacterias (MYC). Centro de Vigilancia Sanitaria Veterinaria (VISAVET). Universidad Complutense (UCM).

Universidad ComplutenseDepartamento de Sanidad Animal. Facultad de Veterinaria. Universidad Complutense (UCM).


Link to 33rd Annual Congress of the European Society of Mycobacteriology





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33rd Annual Congress of the European Society of Mycobacteriology


33rd Annual Congress of the European Society of Mycobacteriology
July 1st-4th, 2012
Brasov
Romania

TITLE: Spoligotyping and VNTR typing of Mycobacterium bovis and Mycobacterium caprae–a review


TYPE: Poster communication


AUTHORS: Rodriguez-Campos S., Romero B., de Juan L., Casal C., Lozano F., Vinolo C., Mateos A., Aranaz A. and Dominguez L.


VISAVET PARTICIPANTS


2nd
Beatriz Romero Martínez
3rd
Lucía de Juan Ferré
5th
Francisco Javier Lozano Barrilero
6th
Cristina Viñolo Águeda
Last
Lucas Domínguez Rodríguez

DATE: July 1st, 2012


CITE THIS COMMUNICATION:

Rodriguez-Campos S., Romero B., de Juan L., Casal C., Lozano F., Vinolo C., Mateos A., Aranaz A. and Dominguez L. Spoligotyping and VNTR typing of Mycobacterium bovis and Mycobacterium caprae–a review. 33rd Annual Congress of the European Society of Mycobacteriology, European Society of Mycobacteriology, Brasov, Romania, July 1st, 2012. (Poster communication)


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