Does anyone know how common pseudomonas aeruginosa is in raw 
honey? 

http://textbookofbacteriology.net/pseudomonas.html

Also will heating honey destroy this bacteria.? 

I've never heard of this bacteria before in relation to honey until a 
manufacturer who is using raw honey in a product found this bacteria 
in a test sample and is implicating honey as the possible source . 

There are other "natural" ingredients in the product so honey is not the 
only possible source. 

Reading the reference I noted above, I can see how honey bees and 
honey could be a carrier of this bacteria. 

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