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Journal of Clinical Microbiology, March 2003, p. 1259-1262, Vol. 41, No. 3
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.3.1259-1262.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Casein Agar: a Useful Medium for Differentiating Candida dubliniensis from Candida albicans

Christian O. Mosca,1,{dagger} María D. Moragues,2 José Llovo,3 Asmaa Al Mosaid,4 David C. Coleman,4 and José Pontón1*

Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología,1 Departamento de Enfermería I, Universidad del País Vasco, Vizcaya,2 Servicio de Microbiología, Hospital Clínico Universitario de Santiago, A Coruña, Spain,3 Microbiology Research Unit, Department of Oral Medicine and Oral Pathology, School of Dental Science, Trinity College, University of Dublin, Dublin 2, Republic of Ireland4

Received 20 May 2002/ Returned for modification 9 July 2002/ Accepted 28 November 2002

Production of chlamydospores on casein agar at 24°C for 48 h provides a simple means for differentiating Candida dubliniensis from Candida albicans based on chlamydospore production. Of 109 C. dubliniensis isolates tested on this medium, 106 (97.2%) produced abundant chlamydospores and three produced few chlamydospores. In contrast, of the 120 C. albicans isolates tested, 111 (92.5%) failed to produce any chlamydospores, whereas the remaining nine isolates produced few chlamydospores. These findings indicate that abundant chlamydospore production on casein agar is a useful test for discriminating between C. dubliniensis and C. albicans.

* Corresponding author. Mailing address: Departamento de Inmunología, Microbiología y Parasitología, Facultad de Medicina y Odontología, Universidad del País Vasco, Apartado 699, E-48080 Bilbao, Vizcaya, Spain. Phone: 94-601-2855. Fax: 94-464-9266. E-mail: oipposaj{at}lg.ehu.es.

{dagger} Present address: Departamento de Microbiología e Inmunología, Facultad de Odontología, Universidad de Buenos Aires, Buenos Aires, Argentina.

Journal of Clinical Microbiology, March 2003, p. 1259-1262, Vol. 41, No. 3
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.3.1259-1262.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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