Synthesis and Evaluation of Tetrazole-BasedHydrazone Derivatives Bearing a Pyridine Moiety as Antimicrobial Agents

2-[(1-Methyl-1H-tetrazol-5-yl)thio]-N'-[(aryl)methylidene/ethylidene]acetohydrazides were synthesized and investigatedin vitroagainst pathogenic bacteriaand Candidaspecies for their antimicrobial activityusing CLSI broth microdilution method. MTT assay was also carried out to evaluate their cytotoxic effects on NIH/3T3 mouse embryonic fibroblast cell lines.2-((1-Phenyl-1H-tetrazol-5-yl)thio)-N'-(1-(pyridin-3-yl)ethylidene)acetohydrazide can be considered as the most promising antibacterial agent againstEnterococcusfaecalis (ATCC 29212) with a MIC value of 100 µg/mL when compared with chloramphenicol (MIC= 200 µg/mL) and low toxicity against NIH/3T3 cells(IC50>500µg/mL).