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8273963 
Journal Article 
Antibacterial activity of Thuja occidentalis, Thuja orientalis and Chamaecyparis obtusa 
Kyoung-Sun, S; Jin, SW; Choi, S; Yun, KW 
2017 
International Journal of Pharmaceutical Quality Assurance 
8 
3 
78-81 
English 
The antibacterial activity of three Cupressaceae plants (Thuja occidentalis, Thuja orientalis and Chamaecyparis obtusa) was tested against three bacteria using the agar diffusion method. The ether and ethylacetate fraction of crude methanol extract from the three plants showed potent antibacterial activity against the tested microorganisms. The result showed that Staphylococcus aureus revealed the most sensitivity among the tested bacteria. Thuja occidentalis ether fraction and Thuja orientalis hexane fraction exhibited the highest antibacterial activity against Staphylococcus aureus. E. coli was shown the highest MIC values compared to the other two tested bacteria, which indicates the lowest antibacterial activity against the bacterium. This study promises an interesting future for designing a potentially active antibacterial agent from the three Cupressaceae plants. © 2017, International Journal of Pharmaceutical Quality Assurance. All rights reserved. 
Antibacterial activity; Chamaecyparis obtuse; Thuja occidentalis; Thuja orientalis