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7 1391 /4 14 / : Invitro. 50 mg/ml. :... invitro... : 1. Vaughan DG, Asbury T, Riordan Eva P. General ophthalmology. 14 th ed. Philadelphia: WB Saunders; Sugita-Konishi Y, Hara-Kudo Y, Amano F, Okubo T, Aoi N, Iwaki M, et al.epigallocatechin gallate and gallocatechin gallate in green tea catechins inhibit extracellular release of Vero toxin from enterohemorrhagic Escherichia coli O157:H7. Biochim Biophys Acta Oct; 1472(1-2): Nataro JP. Atypical enteropathogenic Escherichia coli: typical pathogens? Emerg Infect Dis Apr; 12(4): Zhao WH, Hu ZQ, Hara Y, Shimamura T. Inhibition by epigallocatechin gallate (EGCg) of conjugative R plasmid transfer in Escherichia coli. J Infect Chemother Sep; 7(3): Taguri T, Tanaka T, Kouno I. Antimicrobial activity of 10 different plant polyphenols against bacteria causing food-borne disease. Biol Pharm Bull Dec; 27(12): Bandyopadhyay D, Chatterjee TK, Dasgupta A, Lourduraja J, Dastidar SG. In vitro and in vivo antimicrobial action of tea: the commonest beverage of Asia. Biol Pharm Bull Nov; 28(11): Isogai E, Isogai H, Hirose K, Hayashi S, Oguma K. In vivo synergy between green tea extract and levofloxacin against enterohemorrhagic Escherichia coli O157 infection. Curr Microbiol Apr; 42(4): Tiwari TP, Bharti SK, Kaur HD, Dikshit RP, Hoondal GS. Synergistic antimicrobial activity of tea & antibiotics. Indian J Med Res Jul; 122(1):

8 9. Kkhalaji N, Neyestani N. Inhibitory effects of black tea (Camellia sinensis) extracts on Streptococcus pyogenes: A comparison between black and green teas in vitro. Nutr Sci Food Technol. 2007; 2(1): Khalaji N, Neyestani N. The inhibitory effects of black and green teas (Camellia sinensis) on growth of pathogenic Escherichia coli in vitro. Nutr Sci Food Technol. 2006; 1(3): Yanagida A, Kanda T, Tanabe M, Matsudaira F, Oliveira Cordeiro JG. Inhibitory effects of apple polyphenols and related compounds on cariogenic factors of mutans streptococci. J Agric Food Chem Nov; 48(11):

9 Journal of Shahrekord University of Medical Sciences (J Shahrekord Univ Med Sci) 2012 Oct, Nov; 14(4): Original article The antibacterial effect of camellia sinensis extract on bacterias, conjunctivitis in vitro Memarzadeh SA (MD) 1, Validi M (PhD student) 2 *, Mobini GhR (PhD student) 3, Rafeian- Kopaei M (PhD) 1, Mansouri Sh (PhD student) 4 1 Medical Plants Research Center, Shahrekord University of Medical Sciences, Shahrekord, I.R. Iran; 2 Pathobiology Dept., Tehran University of Medical Sciences, Tehran, I.R. Iran; 3 Cellular and Molecular Dept., Tehran University of Medical Sciences, Tehran, I.R. Iran; 4 Statistic Dept., Hamedan University of Medical Sciences, Hamedan I.R. Iran. Received: 12/Mar/2012 Revised: 22/May/2012 Accepted: 1/Sep/2012 Background and aims: Conjunctivitis is one of the most prevalent ophthalmic diseases. The most feasible treatment of that is using antibiotics. According to arising bacterial resistance to usual antibiotics and their side effects, and using of tea as a healing for ophthalmic diseases base on the traditional beliefs, this study was done to evaluate the antibacterial effect of tea on conjunctivitis diseases. Methods: In this experimental study, patients suffering from conjunctivitis were sampled from the ophthalmology clinic in Shahrekord, Iran. Samples were transferred to the microbiology lab and were subjected to differential culture media and diagnostic tests. Ten samples from each group (totally 30) were isolated from each of the three bacteria including S. aureus, S. epidermidis and S. pneumonia. These strains were separately tested using the pour plate technique with different dilutions of black tea extract. In addition, antibiograms were performed using standard antibiotic disks including vancomycin, Chloramphenicol, Oxacillin, Cefazolin and Ciprofloxacin. Data were analyzed using Chi square, t test and ANOVA. Results: Findings of this study showed that tea extract had a dose dependant inhibatory effects on bacterial growth (P<0.05). This antibacterial effect exists in densities of 50. This effect had a rise in shifting from 50 to mg/ml (P<0.05). Conclusion: According to this study's findings and comparison with similar previous studies, we might suggest tea extract as an antibacterial drug in conjunctivitis. Keywords: Conjunctivitis, Tea extract, Staphylococcus aureous, Staphylcoccus epidermidis, Streptococcus pneumonia. Cite this article as: Memarzadeh SA, Validi M, Mobini GhR, Rafeian M, Mansouri Sh. The antibacterial effect of tea extracts bacteria producer ophthalmia in vitro. J Sharekord Univ Med Sci Oct, Nov; 14(4): * Corresponding author: Pathobiology Dept., Health faculty, Tehran University of Medical Sciences, Tehran, I.R. Iran. Tel: , validi543@gmail.com 69