Methylsulfonylmethane exhibits bacteriostatic inhibition of Escherichia coli, and Salmonella enterica Kinshasa, in vitro.

T L Poole, R Benjamin, K J Genovese, D J Nisbet
Author Information
  1. T L Poole: USDA/ARS, Southern Plains Agricultural Research Center, College Station, TX, USA. ORCID
  2. R Benjamin: Bergstrom Nutrition, Vancouver, WA, USA.
  3. K J Genovese: USDA/ARS, Southern Plains Agricultural Research Center, College Station, TX, USA.
  4. D J Nisbet: USDA/ARS, Southern Plains Agricultural Research Center, College Station, TX, USA.

Abstract

AIMS: To evaluate antibacterial properties of methylsulfonylmethane (MSM) on Escherichia coli (MDRE21) and Salmonella enterica serovar Kinshasa (SK132).
METHODS AND RESULTS: Bacterial proliferation analysis was measured spectrophotometrically during log phase growth with 0, 3, 5, 7, 10, 12 and 16% MSM. To assess the mechanism of inhibition, cultures were grown overnight with 0-16% MSM and enumerated on unmedicated brain-heart infusion agar (BHIA) or BHIA with 0-16% MSM. The long-term viability studies were done to evaluate the impact of 10% MSM. Absorbance data indicated a dose-dependent inhibition from 0 to 16% MSM. There was no growth of MDRE21 or SK132 on BHIA in 10-16% MSM. Both strains enumerated on unmedicated BHIA from overnight cultures with 10-16% MSM were able to partially recover.
CONCLUSIONS: Recovery after MSM removal may be indicative of a bacteriostatic mechanism of inhibition. The long-term viability studies illustrated that neither MDRE21 nor SK132 could be rescued from 10% MSM after 5 or 6 days respectively.
SIGNIFICANCE AND IMPACT OF THE STUDY: Methylsulfonylmethane antibacterial activity may prove useful during pre or postharvest food safety as a disinfectant. The primary benefit being, its clinical safety to humans. Comparisons to other disinfectants would also need to be done to determine if MSM was superior to those already on the market and would be cost effective.

Keywords

References

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Grants

  1. Comodity grant $12,000.00/Bergstrom Nutrition
  2. /U.S. Department of Agriculture
  3. /Agricultural Research Service

MeSH Term

Anti-Infective Agents
Dimethyl Sulfoxide
Escherichia coli
Food Microbiology
Food Safety
Humans
Microbial Viability
Salmonella enterica
Sulfones

Chemicals

Anti-Infective Agents
Sulfones
dimethyl sulfone
Dimethyl Sulfoxide

Word Cloud

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