Fig. 6

Changes in periodontal conditions in cats with P. gulae before and after daily mastic (5%) gel treatment. (A) Experimental schedule. (B) Methyl mercaptan (ppb) and (C) hydrogen sulfide (ppb) levels in expired breath were significantly reduced after 30–40 days of treatment. (D) Gingivitis and (E) plaque index were significantly improved compared to pre-treatment and vehicle control values. (F) DNA detection of P. gulae and (G) BANA hydrolysis were significantly suppressed by mastic treatment compared to pre-treatment and vehicle control levels. Data are presented as mean ± 1 SEM; n = 10 for mastic, n = 5 for vehicle control; p < 0.05 (uncorrected Fisher’s LSD test). BANA, N-benzoyl-DL-arginine-2-naphthylamide; PCR, polymerase chain reaction.