Chemical composition and antimicrobial activity of Satureja hortensis and Trachyspermum copticum essential oil

The aim of this study was to evaluate the chemical composition and antimicrobial activity of Satureja hortensis and Trachyspermum copticum essential oils against different kinds of microorganisms in vitro. The antimicrobial activity was evaluated by micro broth dilution assay and the chemical composition of essential oils was analyzed by GC and GC/MS. Thymol, p-cymene, gamma-terpinene and carvacrol were the main components of S. hortensis oil while thymol, gamma-terpinene, and o-cymene were the major components of T. copticum oil. Two essential oils exhibited strong antimicrobial activity but the antimicrobial activity of T. copticum oil was higher than that of S. hortensis oil. Thymol as a main component of oils plays an important role in antimicrobial activity

Comparison of antimicrobial activity of Respitol-B with mentofin containing menthol, eucalyptus oil

Some essential oils and their main components have antibacterial activity and used as an antiseptics. Respitol-B [Barijessence, Kashan, Iran] which is similar to Mentofin, an imported antimicrobial agents, contains menthol and eucalyptus oil. Both products are used as disinfectant in poultry farms following vaccination of broilers and pullets. In this study, the antimicrobial activity of Respitol-B and Mentofin, against bacteria, fungi and yeast was investigated. The antimicrobial activities of eucalyptus oil and mentho was also tested separately using disk diffusion test and macrobroth dilution assay. The gram-positive bacteria, yeast and fungi showed more susceptibility to Respitol-B than the gram negative bacteria. Antimicrobial activity of Respitol-B was the same as mentofin. Menthol is more potent than the eucalyptus oil. It enhanced the antimicrobial activity of Respitol-B. However P. aeruginosa, E. coli and S. typhi showed resistance to this compound. Eucalyptus oil had antimicrobial effect against V. chlerae, A. flavus, and S. aureus but had no effect on other tested microorganism. Respitol-B, a compound formulated by Barij Essence shows the same an antiseptic property as Mentofin and can be used for sanitary protocols in poultry farms