Garlic (Allium sativum) as an anti-Candida agent

a comparison of the efficacy of fresh garlic and freeze-dried extracts

Lemar, K. M.
Turner, M. P.
Lloyd, D.

Microbiology (BIOSI 1), Cardiff University, Cardiff, Wales, UK

Correspondence to: K.M. Lemar, Microbiology (BIOSI 1), Cardiff University, Cardiff CF10 3TL, UK (e-mail: [email protected]).

2002/5: received 15 January 2002, revised 29 April 2002 and accepted 13 May 2002

Journal of Applied Microbiology 93(3):p 398-405, September 2002.

Aims

To determine the effects of fresh and freeze-dried extracts of Allium sativum on the physiology and morphology of Candida albicans.

Methods and Results

Inhibition of growth in glucose-yeast extract-peptone was measured using a multiwell plate reader. Scanning and transmission electron microscopy investigations indicated loss of structural integrity. Gas chromatography-mass spectrometry of extracts was employed to separate and quantify putative inhibitory sulphur-containing components.

Conclusions

Fresh garlic extract has a greater efficacy than garlic powder extract as indicated both by its effects on morphology and inhibition of growth.

Significance and Impact of the Study

The ubiquitous opportunistic pathogen C. albicans is sensitive to garlic; resistance to the broad spectrum of active principles present is unlikely so that its anticandidal effects may provide an important alternative route to chemotherapy.