http://bovinetb.blogspot.com/2006/10/premtesting-6-months-on.html to show the results of a thirty year survey which concludes:
"In general the spoligotype and VNTR patterns obtained from badger isolates between 1972 - 1976 were the same as those observed in the same geographical areas today. This suggests that the geographical clustering of strains has not changed since the first isolation of M.bovis from badgers over thirty years ago."
The results of the geographic spoligotyping excercise on reactor cattle is below:
Type 9 isolated in 44% Cornwall/Devon 20% Dyfed
Type 17 " 66% Here /Worcs / Glos.
Type 21 " 74% Somerset / Avon
Type 35 " 77% Here / Worcs /Shrops.
Type 10 " 79% Glos.
Type 25 " 79% Staffs / Derbys.
Type 22 " 84% Gwent / Here / Worcs.
Type 15 " 89% Cornwall
Type 11 " 93% Devon / Somerset
Type 12 " 94% Cornwall
Type 20 " 95% Cornwall
So, up to 95% of m.bovis isolates identified from reactor cattle, are identical to the strains identified and persisting for over thirty years in ....... badgers indigenous to the same geographical area? Yup, they are.
We accept that the 5 - 25 per cent of isolates identified outside their indigenous home deserve attention, but what about the cause of up to 95 percent - which is getting absolutely none?