Effects of mastic resin and its essential oil on the growth of proteolytic Clostridium botulinum

  • Daifas D
  • Smith J
  • Blanchfield B
 et al. 
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Abstract

Studies were done to determine the effect of mastic resin and its essential oil, alone and in conjunction with ethanol, on the growth of proteolytic strains of Clostridium botulinum in media, and on neurotoxin production in challenge studies with English-style crumpets. Preliminary studies, using a spot-on-the-lawn method, indicated that high levels of mastic resin in ethanol (∼8% w/w) were required for complete inhibition of all strains of C. botulinum tested, but mastic resin in ethanol had a greater anti-botulinal effect than ethanol alone. However, only low levels of mastic oil (∼0.3% v/v) were required for inhibition of proteolytic strains of C. botulinum. Both studies showed a strain specific inhibition, with C. botulinum type A strains being more sensitive to mastic resin and its essential oil than type B strains. However, mastic resin in ethanol proved to be more effective when used as a vapor phase inhibitor applied to cotton pads and placed inside inoculated plates than when added directly to media. While both mastic resin and its essential oil inhibited the growth of proteolytic strains of C. botulinum in vitro, they failed to inhibit neurotoxin production in challenge studies with C. botulinum in English-style crumpets. © 2004 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Botulinum neurotoxin
  • Clostridium botulinum
  • Ethanol
  • Mastic

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Authors

  • Daphne Phillips Daifas

  • James P. Smith

  • Burke Blanchfield

  • Greg Sanders

  • John W. Austin

  • John Koukoutisis

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