Antimicrobial effect of acidified nitrite on dermatophyte fungi, candida, and bacterial skin pathogens

R. Weller, R. J. Price, Anthony Ormerod, N. Benjamin, C. Liefert

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Aims: Nitric oxide is generated from sweat nitrite in the acidic environment of the skin surface and is thought to contribute to protection against infection. This study examined the sensitivity of Trichophyton mentagrophytes, T. rubrum, Candida albicans, Streptococcus pyrogenes, Staphylococcus aureus and Propionibacterium acnes to acidified nitrite.

Methods and Results: Organisms were cultured in varying concentrations of nitrite and pH for different lengths of time, before being transferred to recovery medium. With the exception of Strep. pyogenes, addition of nitrite increased the antimicrobial activity of acid solutions against all organisms tested. The rank order of sensitivity was: C. albicans < T. rubrum < T. mentagrophytes < Staph. aureus < P. acnes, with P. acnes being most sensitive.

Conclusions: This work has shown that acidified nitrite is microbiocidal to common cutaneous pathogens. The concentrations of nitrite required to kill pathogenic fungi and bacteria in in vitro assays were higher than the concentrations of nitrite measured in sweat. However, additional co-factors in vivo and in sweat may potentiate the effect of acidified nitrite.

Significance and impact of the Study: Pharmacological preparations of acidified nitrite are novel antimicrobial agents. These data suggest skin organisms which may be sensitive to this treatment.

Original languageEnglish
Pages (from-to)648-652
Number of pages4
JournalJournal of Applied Microbiology
Volume90
Publication statusPublished - 2001

Keywords

  • OXIDE RELEASE ACCOUNTS
  • DIETARY NITRATE
  • REACTIVE OXYGEN
  • IN-VITRO
  • SYNTHASE
  • SUSCEPTIBILITY
  • RESISTANCE
  • REDUCTION
  • PSORIASIS
  • CREAM

Cite this

Weller, R., Price, R. J., Ormerod, A., Benjamin, N., & Liefert, C. (2001). Antimicrobial effect of acidified nitrite on dermatophyte fungi, candida, and bacterial skin pathogens. Journal of Applied Microbiology, 90, 648-652.

Antimicrobial effect of acidified nitrite on dermatophyte fungi, candida, and bacterial skin pathogens. / Weller, R.; Price, R. J.; Ormerod, Anthony; Benjamin, N.; Liefert, C.

In: Journal of Applied Microbiology, Vol. 90, 2001, p. 648-652.

Research output: Contribution to journalArticle

Weller, R, Price, RJ, Ormerod, A, Benjamin, N & Liefert, C 2001, 'Antimicrobial effect of acidified nitrite on dermatophyte fungi, candida, and bacterial skin pathogens', Journal of Applied Microbiology, vol. 90, pp. 648-652.
Weller, R. ; Price, R. J. ; Ormerod, Anthony ; Benjamin, N. ; Liefert, C. / Antimicrobial effect of acidified nitrite on dermatophyte fungi, candida, and bacterial skin pathogens. In: Journal of Applied Microbiology. 2001 ; Vol. 90. pp. 648-652.
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PY - 2001

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N2 - Aims: Nitric oxide is generated from sweat nitrite in the acidic environment of the skin surface and is thought to contribute to protection against infection. This study examined the sensitivity of Trichophyton mentagrophytes, T. rubrum, Candida albicans, Streptococcus pyrogenes, Staphylococcus aureus and Propionibacterium acnes to acidified nitrite.Methods and Results: Organisms were cultured in varying concentrations of nitrite and pH for different lengths of time, before being transferred to recovery medium. With the exception of Strep. pyogenes, addition of nitrite increased the antimicrobial activity of acid solutions against all organisms tested. The rank order of sensitivity was: C. albicans < T. rubrum < T. mentagrophytes < Staph. aureus < P. acnes, with P. acnes being most sensitive.Conclusions: This work has shown that acidified nitrite is microbiocidal to common cutaneous pathogens. The concentrations of nitrite required to kill pathogenic fungi and bacteria in in vitro assays were higher than the concentrations of nitrite measured in sweat. However, additional co-factors in vivo and in sweat may potentiate the effect of acidified nitrite.Significance and impact of the Study: Pharmacological preparations of acidified nitrite are novel antimicrobial agents. These data suggest skin organisms which may be sensitive to this treatment.

AB - Aims: Nitric oxide is generated from sweat nitrite in the acidic environment of the skin surface and is thought to contribute to protection against infection. This study examined the sensitivity of Trichophyton mentagrophytes, T. rubrum, Candida albicans, Streptococcus pyrogenes, Staphylococcus aureus and Propionibacterium acnes to acidified nitrite.Methods and Results: Organisms were cultured in varying concentrations of nitrite and pH for different lengths of time, before being transferred to recovery medium. With the exception of Strep. pyogenes, addition of nitrite increased the antimicrobial activity of acid solutions against all organisms tested. The rank order of sensitivity was: C. albicans < T. rubrum < T. mentagrophytes < Staph. aureus < P. acnes, with P. acnes being most sensitive.Conclusions: This work has shown that acidified nitrite is microbiocidal to common cutaneous pathogens. The concentrations of nitrite required to kill pathogenic fungi and bacteria in in vitro assays were higher than the concentrations of nitrite measured in sweat. However, additional co-factors in vivo and in sweat may potentiate the effect of acidified nitrite.Significance and impact of the Study: Pharmacological preparations of acidified nitrite are novel antimicrobial agents. These data suggest skin organisms which may be sensitive to this treatment.

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KW - REACTIVE OXYGEN

KW - IN-VITRO

KW - SYNTHASE

KW - SUSCEPTIBILITY

KW - RESISTANCE

KW - REDUCTION

KW - PSORIASIS

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M3 - Article

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JO - Journal of Applied Microbiology

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SN - 1364-5072

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