Saliva has more bacteria than blood because of all of the oral bacteria . Most common type of bacteria in blood is bacteria , in a mostly harmless form . Saliva spreads molecules to the taste receptors on the tongue .
Saliva contains more DNA than blood because of all of the oral bacteria . Most common type of bacteria in saliva is Streptococcus , in a mostly harmless form . Saliva spreads molecules to the taste receptors on the tongue .