"(...) The elevations of Ag, Ba and Sr were thought to originate from both natural geochemical and artificial pollutant sources--stemming from the common practise of aerial spraying with 'cloud seeding' Ag or Ba crystal nuclei for rain making in these drought prone areas of North America, the atmospheric spraying with Ba based aerosols for enhancing/refracting radar and radio signal communications (...)" Purday, Mark Elevated silver, barium and strontium in antlers, vegetation and soils sourced from CWD cluster areas: do Ag/Ba/Sr piezoelectric crystals represent the transmissible pathogenic agent in TSEs? in: Med Hypotheses. 2004;63(2):211-25. http://www.ncbi.nlm.nih.gov/pubmed/15236778?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=1&log$=relatedarticles&logdbfrom=pubmed
"How is CWD diagnosed? The only way to make a definitive diagnosis is to examine the brain and/or anterior lymph nodes (near the head) in a laboratory. There is no practical live-animal test for free-ranging cervids, and there is no vaccine or treatment for CWD. " http://www.dgif.virginia.gov/wildlife/diseases/cwd/cwd-brochure.pdf
