TEd,As a microbiologist by training I though that your story might not be entirely correct. The rabies are caused by a virus and viruses can not multiply in faeces, they need a living organism to reproduce themselves. That’s why spreading of rabies usually require that the victim is bitten by a diseased animal (dog, fox, bat) so the saliva, which contains the virus is in direct contact with broken skin. I found a document titled “Managing Health Hazards Associated with Birds and Bats Excrements” by US Environmental Hygiene Agency
http://chppm-www.apgea.army.mil/imo/ddb/dmd/DMD/TG/TECHGUID/Tg142.pdf
They say there that an airborne rabies infection has been demonstrated only in one cave in Texas.
So either a friend of your friend has been unfortunate to breathe in a wrong place in Texas or he’s been scratched or bitten by a bat.
