Hi,
I am a medical microbiologist by trade. I read that post by llama and I don't read it as pathogens can not live in any of the stages of brewing. I read that the production of beer has many beneficial biproducts of the reactions none of which is a pathogen to humans. There are however many of these biproducts that act as inhibitors to bacterial growth such as ethanol and phenolics. I wouldn't say you can't grow a pathogen in beer but just like anything in life chances are that it is pretty unlikely and that is why we sanitize.
The standard belief is that "no known pathogens can survive in beer".
To date I have not seen anything to contradict that.
I think the CDC basically stated something along those lines after that stupid beer pong spreading herpies hoax that fox news ran so hard with.
Can you enlighten us on the subject?