title: Antimicrobial activity of different tea varieties available in Pakistan.
abstract: In this antimicrobial study, various extracts of Green and Black tea (Camellia sinensis) and Lemon grass (Cymbopogon citrates) were evaluated for antimicrobial activities against six bacterial strains including both human pathogenic bacteria (Escherichia coli, Pseudomonas aeuroginosa, Staphylococcus aureus and Salmonella typhi) and plant pathogenic bacteria (Erwinia carotovora, Agro bacterium tumifaciens) and one fungal strain Candida albicans by disc diffusion susceptibility method. Of human pathogens, P. aeruginosa was most susceptible to all three different tea varieties; though rest of the strains also demonstrated prominent sensitivity. In comparison, black tea extracts were less activities than green tea and lemon grass. However, all the three tea varieties illustrated profound activity against plant pathogenic bacteria. Similarly, when extracts of tea were tested against C. albicans, green tea and lemon grass exhibited significant activity while black tea was mostly inactive.
authors.affiliation: Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Zakir
authors.affiliation: Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
authors.forename: Khush Bakht
authors.initials: KB
authors.lastname: Sultan
authors.affiliation: Department of pharmacy, Abdul Wali Khan University Mardan, Pakistan.
authors.forename: Haroon
authors.initials: H
authors.lastname: Khan
authors.affiliation: Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
authors.lastname: Ihsaanullah
authors.affiliation: Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
authors.forename: Murad Ali
authors.initials: MA
authors.lastname: Khan
authors.affiliation: Medicinal Botanic Center, PCSIR Labs Complex Peshawar, Institute of Chemical Sciences, University of Peshawar, Pakistan.
authors.forename: Hina
authors.initials: H
authors.lastname: Fazal
authors.affiliation: Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
authors.forename: Abdur
authors.initials: A
authors.lastname: Rauf
mesh_terms: D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D000935:Antifungal Agents / Q000302:isolation & purification / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D028241:Camellia sinensis / Q000737:chemistry / Q000145:classification; D002176:Candida albicans / Q000187:drug effects / Q000254:growth & development; D031743:Cymbopogon / Q000737:chemistry; D052978:Disk Diffusion Antimicrobial Tests; D010154:Pakistan; D008517:Phytotherapy; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D018515:Plant Leaves; D010946:Plants, Medicinal
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D010936:Plant Extracts