Human mouths contain a balanced mix of microbes which, when disrupted, can lead to oral diseases. A new study compares the bacteria and fungi present in the mouths of healthy individuals with those from patients infected with HIV and illustrates why oral candidiasis (aka 'thrush') is a common complication of HIV infection.<img src="http://feeds.feedburner.com/~r/sciencedaily/~4/y-F3IpU0fjA" height="1" width="1"/>
