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Journal of Clinical Microbiology, January 2004, p. 236-238, Vol. 42, No. 1
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.1.236-238.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Nonvalue of Culturing Cerebrospinal Fluid for Fungi

Joan Barenfanger,* Jerry Lawhorn, and Cheryl Drake

Memorial Medical Center, Springfield, Illinois

Received 31 July 2003/ Returned for modification 20 September 2003/ Accepted 11 October 2003

No studies have evaluated the efficacy of culturing cerebrospinal fluid (CSF) for fungi. Because of the facts that the most common fungi responsible for meningitis grow well in media utilized for routine bacterial cultures and that cryptococcal antigen tests are commonly ordered, the efficacy of routinely performing fungal cultures specifically to recover fungi has been questioned. We examined data from 1,225 samples of CSF which were cultured for both bacteria and fungi. Twelve specimens yielded fungi, 10 from fungal cultures and 8 from bacterial cultures. Cryptococcus neoformans was found in 10 specimens, Candida albicans was found in 1, and a Cladosporium sp. was found in 1. Eight of 12 positive specimens had concordant culture results. The discordant cases were one specimen that was bacterial culture positive but fungal culture negative and three specimens that were fungal culture positive but bacterial culture negative. Of the latter discrepant cultures, one had fungal contamination only and the other two were positive for cryptococcal antigen. Therefore, omitting the fungal cultures on these specimens would not adversely impact patients. When both cryptococcal antigen tests and bacterial cultures are ordered routinely, eliminating fungal cultures on CSF would have had no impact on the patients in this study. All the clinically significant fungi were detected by the cryptococcal antigen test and/or bacterial culture. With a few exceptions, the combined use of cryptococcal antigen test and bacterial cultures of CSF could replace routine fungal cultures of CSF. Exceptions include settings where fungal pathogens other than Cryptococcus and Candida remain important causes of meningitis.

* Corresponding author. Mailing address: Laboratory Medicine, Memorial Medical Center, 701 N. First St., Springfield, IL 62781. Phone: (217) 788-3000. Fax: (217) 788-5577. E-mail: barenfanger.joan{at}mhsil.com.

Journal of Clinical Microbiology, January 2004, p. 236-238, Vol. 42, No. 1
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.1.236-238.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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