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Clinical Microbiology Reviews, April 2001, p. 398-429, Vol. 14, No. 2
0893-8512/01/$04.00+0   DOI: 10.1128/CMR.14.2.398-429.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Experimental Oral Candidiasis in Animal Models

Yuthika H. Samaranayake and Lakshman P. Samaranayake*

Oral Biosciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China

Oral candidiasis is as much the final outcome of the vulnerability of the host as of the virulence of the invading organism. We review here the extensive literature on animal experiments mainly appertaining to the host predisposing factors that initiate and perpetuate these infections. The monkey, rat, and mouse are the choice models for investigating oral candidiasis, but comparisons between the same or different models appear difficult, because of variables such as the study design, the number of animals used, their diet, the differences in Candida strains, and the duration of the studies. These variables notwithstanding, the following could be concluded. (i) The primate model is ideal for investigating Candida-associated denture stomatitis since both erythematous and pseudomembranous lesions have been produced in monkeys with prosthetic plates; they are, however, expensive and difficult to obtain and maintain. (ii) The rat model (both Sprague-Dawley and Wistar) is well proven for observing chronic oral candidal colonization and infection, due to the ease of breeding and handling and their ready availability. (iii) Mice are similar, but in addition there are well characterized variants simulating immunologic and genetic abnormalities (e.g., athymic, euthymic, murine-acquired immune deficiency syndrome, and severe combined immunodeficient models) and hence are used for short-term studies relating the host immune response and oral candidiasis. Nonetheless, an ideal, relatively inexpensive model representative of the human oral environment in ecological and microbiological terms is yet to be described. Until such a model is developed, researchers should pay attention to standardization of the experimental protocols described here to obtain broadly comparable and meaningful data.

* Corresponding author. Mailing address: Oral Biosciences, Faculty of Dentistry, University of Hong Kong, 34 Hospital Rd., Hong Kong SAR, China. Phone: (852) 2859-0480. Fax: (852) 2547-6133. E-mail: lakshman{at}hkucc.hku.hk.

Clinical Microbiology Reviews, April 2001, p. 398-429, Vol. 14, No. 2
0893-8512/01/$04.00+0   DOI: 10.1128/CMR.14.2.398-429.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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