PT  - JOURNAL ARTICLE
AU  - Yaasir Mamoojee
AU  - David Chadwick
TI  - How appropriate are cerebrospinal fluid polymerase chain reaction requests for suspected central nervous system infections?
AID  - 10.7861/clinmedicine.11-6-554
DP  - 2011 Dec 01
TA  - Clinical Medicine
PG  - 554--557
VI  - 11
IP  - 6
4099  - http://www.rcpjournals.org/content/11/6/554.short
4100  - http://www.rcpjournals.org/content/11/6/554.full
SO  - Clin Med2011 Dec 01; 11
AB  - Cerebrospinal fluid (CSF) polymerase chain reaction (PCR) assays have become the main diagnostic tests for central nervous system viral infections in recent years. Previous studies have suggested algorithms based on CSF leukocyte count and total protein levels to determine when CSF PCR assays are indicated. Based on these criteria, 1,469 CSF PCR tests requested over a two-year period were reviewed. A proportion of positive PCR results were found in children with normal CSF, unlike in adults where such occurrences were extremely rare. The results suggest that applying a strategy of screening CSF specimens using leukocyte count, glucose and protein, at least in adults, may have avoided more than half of CSF PCR requests with little detriment to patient care and considerable cost savings. Larger prospective studies are needed to determine whether algorithms using standard CSF parameters and clinical information can optimise the use of CSF PCR assays in clinical practice.