Table 1. List of oral bacteria under investigation.

The colour codes refer to the classification of Socransky et al. (1998) to divide the bacteria into several bacterial complexes. The formation of these complexes is based on their association with health or disease severity. The blue, yellow, green and purple complexes designate early colonizers of the oral microbiota, whereas the red and orange ones are associated with more matured biofilms and periodontal disease.

Abbreviation		Genus & Species
Aa	Blue complex	Aggregatibacter actinomycetemcomitans
Pg	Red complex	Porphyromonas gingivalis
Tf	Red complex	Tannerella forsythensis
Td	Red complex	Treponema denticola
Pi	Orange complex	Prevotella intermedia
Fn	Orange complex	Fusobacterium nucleatum
Pm	Orange complex	Parvimonas micra
Pn	Orange complex	Prevotella nigrescens
Cg	Orange complex	Campylobacter gracilis
Cr	Orange complex	Campylobacter rectus
En	Orange complex	Eubacterium nodatum
Ec	Green complex	Eikenella corrodens
Cs	Green complex	Capnocytophaga species
Cc	Green complex	Campylobacter concisus
Smg	Yellow complex	Streptococcus milleri group
Sg	Yellow complex	Streptococcus gordonii
Scg	Yellow complex	Streptococcus cristatus group
Ao	Purple complex	Actinomyces odontolyticus
Av	Purple complex	Actinomyces viscosus
Vp	Purple complex	Veillonella parvula