J Agric Food Chem 2007, 55:5445–5451.PubMedCrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions AP, VC, SP and VDV performed

susceptibility assay, time-killing assay, synergy testing, and in vitro testing against biofilm formation BAY 57-1293 cell line and preformed biofilms. MS, MM, and RG took care of peptide synthesis, purification and characterization, and of SCFM preparation. GG and GD performed PFGE assay. EF collected clinical strains and also took care of their phenotypic characterization. GDB and MS drafted the manuscript, in collaboration with AP, GG, and RG. GDB also carried out the statistical analysis.

All authors read and approved the final version.”
“Background Oral cancer is one of the ten most prevalent cancers in the world with more than 90% of mouth neoplasms being squamous cell carcinoma that has its origin from the Doxorubicin cell line oral mucosa [1–3]. During the year 2011, in United States, approximately, 39,400 new cases and 7,900 deaths were estimated attributing to cancer of oral cavity and pharynx [4]. Five year survival rates for persons with this medical condition are currently only 60.9% [4]. The early detection of oral cancer at initial stages is critical and requires less radical treatment for patient’s survival and improving quality of life. The pathogenesis of OSCC is attributed mainly to smoking, heavy alcohol consumption and smokeless tobacco products [5–7]. Other possible risk factors include viral infections [8, 9], infection with Candida species [10], periodontitis [11, 12], poor oral hygiene [13], poor dental status [14] and chronic bacterial infections and inflammation [5, 6, 15–17]. The association of bacterial infection and

cancer is classically represented by Helicobacter pylori and its involvement Reverse transcriptase in gastric adenocarcinoma and mucosa associated lymphoid tissue (MALT) lymphoma [18]. Some studies suggests possible link between Salmonella typhi and gall bladder cancer, Streptococcus bovis and colon cancer, Chlamydophila pneumoniae and lung cancer, Bartonella species and vascular tumor formation, Propionibacterium acnes and prostate cancer and Escherichia coli in inflammatory bowel disease with increased risk of colon cancer [15, 19, 20]. These findings were confirmed by using several animal (mice) models for Helicobacter hepaticus associated with hepatocellular carcinoma [21], colon cancer [22] and cancer in mammary glands [23]. There is growing evidence that bacterial infection is causally related to carcinogenesis.