Table 2.

Changes in different genera of the phylum Firmicutes at the end of the gingivitis induction phase, according to various studies and oral ecosystems.

Genus	Subgingival					Supragingival
	Schincaglia et al., (2017) [12]	Al-Kamel et al., (2018) [21]	Bamashmou et al., (2021) [13]	Hall et al., (2023) [14]	Nowicki et al., (2018) [18]	Huang et al., (2014) [16]	Teng et al., (2016) [17]	Belstrøm et al., (2018) [20]	Huang et al., (2021) [19]	Hall et al., (2023) [14]
Streptococcus a		↓	↓	↓	↓	↓	↓	↓	↓	↓
Granulicatella a				↓				↓		↓
Selenomonas b	↑		↑	↑		↑			↑	↓
Dialister b				↑						NS
Johnsonella c				↑		↑				↑
Gemella a			↓	NS					NS	↑
Parvimonas d				↑						NS
Catonella c				↑		↑				↑
Centipeda b				↑						↑
Clostridia_UCG-014 c				↑						↑
Peptostreptococcaceae_[G-7] and [G-9] c				↑		↑				NS
Clostridia_vadinBB60_group c				NS						↓
Peptococcus c				↑		↑			↑	NS

^a: class Bacilli; ^b: class Negativicutes; ^c: class Clostridia; ^d: traditionally classified in the class Clostridia but now considered to belong to the class Tissierellia [27]; NS: not statistically significant differences between the beginning and the end of the induction phase of gingivitis. Arrows indicate the direction of the change: increase (↑) or decrease (↓).