Growth kinetics, antigen profiling, and proteinase activity of Egyptian Trichomonastenax isolates derived from patients having oral infections

► Growth of seven Trichomonastenax isolates on TYI-S-33 showed variable growth characteristics. ► The isolates varied in their protein profiles and cysteine proteinase expression. ► Different strains with a possibility of variable pathogenic potential may exist. ► Causation and pathogenic mechanisms of T.tenax in periodontal disease need more work.