About a dozen animals a year in the US die from anthrax and hundreds die each year from anthrax in Pakistan and Afghanistan. Billions of spores are in the soil below a dead aninmal.
Anthrax is also called the "Fur Handler's Disease."
There is even a location in the US (NW Nebraska) that has the "Mueseum of the Fur Trade (Chadron, Nebraska); deposits of bentonite (NW Sheridan county Nebraska); and anthrax outbreaks in cattle (26 dead 1994, Sheridan county herd).
That said and going back to our brainstorming session, I still think that the date is a red herring and the "G" is the most significant letter in those, uh, letters. I don't think this G could have been written upside down, or by a right hander writing with the south paw. A foreigner from a European or South American country will be confused for the rest of his life about the proper way to write a date in a country that calls a handball game 'football'. An Arab? I dunno; it would be interesting to find out how they react to American date writing.