E. Chryssanthou et al., PCR and other non-culture methods for diagnosis of invasive Candida infections in allogeneic bone marrow and solid organ transplant recipients, MYCOSES, 42(4), 1999, pp. 239-247
In this prospective study 197 serum and 152 urine samples were collected fr
om 40 bone marrow and solid organ transplant recipients with clinically sus
pected invasive fungal infection before, during and after empirical treatme
nt with lipid formulation of amphotericin B or fluconazole. Serum was analy
sed by Candida polymerase chain reaction (PCR) and urine by measurement of
D/L-arabinitol ratio. One serum from each patient was also tested for conce
ntration of (1-->3)-beta-glucan and two commercial Candida antigens. Invasi
ve fungal infection was diagnosed in four candidosis and one aspergillosis
patients(13%). Positive PCR, elevated D/L-arabinitol ratio, (1 --> 3)-beta-
glucan concentration and antigens were detected in nine, 15, 17, and seven
patients, respectively. The agreement between PCR and D/L-arabinitol assays
was poor. However, 56% agreement was observed between positive PCR and bet
a-glucan and/or antigen assays, and 60% agreement between positive D/L-arab
initol and beta-glucan and/or antigen assays. Combination of several non-cu
lture assays is needed to diagnose invasive fungal infection in high-risk t
ransplant recipients. No single test was sufficient for diagnosis.