title: The antibacterial effect of four mouthwashes against streptococcus mutans and escherichia coli.
abstract: OBJECTIVE
  To evaluate the antimicrobial properties of several mouthwash concentrations on oral Streptococcus mutans and Escherichia coli.
  
  
  METHODS
  The study was conducted at Shiraz Medicine School in 2011. Serial dilutions of Chlorohexidin, Oral B and Persica and Irsha (2,4,8,16,64,128) were prepared in Muller-Hinton media. Minimum inhibitory concentration was visually determined and defined as the lowest concentration of each oral washing which inhibited > 95% growth reduction compared to the growth control well.
  
  
  RESULTS
  Chlorhexidine, Oral B and Irsha mouthwash inhibited Streptococcus mutans even with diluted concentrations. Also, Chlorhexidine and Oral B prohibited Escherichia coli with different potencies. But Persica had no antimicrobial activity against either Escherichia coli or Streptococcus mutans.
  
  
  CONCLUSIONS
  Chlorhexidine, Irsha, and Oral B mouthwashes can be used for antimicrobial effects, especially on Streptococcus mutans. This chemical activity of mouthwashes is an adjuvant for mechanical removing of plaque. However, the antimicrobial effect of Persicaremains controversial.
authors.affiliation: Department of Oral & Maxillofacial Disease, School of Dentistry, Shiraz, Iran.
authors.forename: Janan
authors.initials: J
authors.lastname: Ghapanchi
authors.affiliation: Department of Oral & Maxillofacial Disease, School of Dentistry, Shiraz, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Lavaee
authors.affiliation: Department of Microbiology, School of Medicine, Shiraz, Iran.
authors.forename: Afagh
authors.initials: A
authors.lastname: Moattari
authors.affiliation: Dentist, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Mahmood
authors.initials: M
authors.lastname: Shakib
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002710:Chlorhexidine / Q000494:pharmacology*; D015169:Colony Count, Microbial; D004926:Escherichia coli / Q000187:drug effects / Q000302:isolation & purification; D006801:Humans; D008826:Microbial Sensitivity Tests; D009055:Mouth / Q000382:microbiology*; D009067:Mouthwashes / Q000145:classification / Q000494:pharmacology; D012106:Research; D013295:Streptococcus mutans / Q000187:drug effects / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D009067:Mouthwashes; D002710:Chlorhexidine
keywords: Laboratory research, Chlorhexidine, Persica, Listerine, Oral B, Streptococcus mutans, Escherichia coli.