What Causes Dysgeusia And Odor In The Mouth?

Hi, may I answer your health queries right now ? Please type your query here...i always keep a real bad taste in my mouth all the time no matter what i do so i went to a dentist in houston tx he did a hains diagnostics identification test on a sample between my teeth and mail it off for the results and it came back as high level of porphyromonas gingivalis then i went to 2 other dentist and they say there is no way i could have this disease cause my teeth and gums are healthy and they don't bleed and when they measured the depth it was only 2 to 3 mm so im confused i know it has to be something because i can't get rid of the horrible taste and odor in my mouth.thank you