Table 1. Relevant epidemiological characteristics of the ten islands or archipelagos included in the study (see also Fig. 1).

Island or archipelago	Number of MTC strains	References
Great Britain	34 strains in 9839 isolates	http://www.mbovis.org/spoligodatabase/GBmetadata/frequency%20spoligo%20GB.html. Accessed 2013 Jul 3.
Ireland	29 strains in 503 isolates	[67]–[68] http://www.dardni.gov.uk/index/statistics/animal-disease-statistics/statistics-tuberculosis.htm. Accessed 2013 Jul 3.
Sicily	19 strains in 145 isolates	http://www.salute.gov.it/relazioneAnnuale2010/paginaInternaSottomenuRelazioneAnnuale2010.jsp?id=482&lingua=italiano&menu=cap2&sottomenu=162. Accessed 2013 Jul 3.
Sardinia	No information available	http://www.salute.gov.it/relazioneAnnuale2010/paginaInternaSottomenuRelazioneAnnuale2010.jsp?id=482&lingua=italiano&menu=cap2&sottomenu=162. Accessed 2013 Jul 3.
Corsica	3–4 strains in <10 isolates	[62], [69]
Canary Islands	4 strains in 55 isolates	[70]; http://rasve.magrama.es. Accessed 2013 Jul 3.
Balearic Islands	3 strains in 8 isolates	[70]; http://rasve.magrama.es. Accessed 2013 Jul 3.
Azores	4 strains in 20 isolates	[71]; but outbreak in 2007 see Matos et al. [30]
Madeira	0 types, TB free	[71]
Malta	0 strains, TB free	http://www.efsa.europa.eu/en/scdocs/doc/zoon_report_2005_Malta_en.pdf. Accessed 2013 Jul 3.

The number of strains is based on spoligotyping.