Do not know what the procedures are now but it use to be MAF (I know they no longer exist so who is the current equivelant DEFRA?) who did all the testing in specialist labs I think they use to collect the samples as well. Not one for archaeologists to mess with I would have thought. I can remember being told not to mess with any buried animal that still had its wool on. Prevention i.e suitable protective clothing should be the approach if anthrax is even suspected. Also specialist advice an absolute must before even contemplating excavation on a site where there is reason to suspect the spores in the soil.
http://www.defra.gov.uk/
http://archive.defra.gov.uk/foodfarm/far...z/anthrax/
http://www.bt.cdc.gov/agent/anthrax/faq/
http://www.defra.gov.uk/
http://archive.defra.gov.uk/foodfarm/far...z/anthrax/
http://www.bt.cdc.gov/agent/anthrax/faq/