Hepatic Candida infection (HCI; known as chronic disseminated candidosis or CDC) is a distinct form of disseminated Candida infection with predominant involvement of the liver. Diagnosis of HCI is usually made on clinical suspicion together with multiple lesions in liver on ultrasound (US), CT and/or MRI scan. Fungal elements may not always be visible in liver tissue and mycological culture is frequently negative, making the evidence for proven fungal disease difficult. We studied a novel commercially available low-cost and density-array (LCD) chip technique for a molecular diagnosis of HCI. This is a two-step procedure with PCR amplification after DNA extraction followed by hybridization on a small chip provided by the manufacturer (Fungi 2.1, Chipron GmbH). The analysis of DNA from 45 fungal control strains showed an excellent specificity and sensitivity. The DNA from 11 liver biopsies of patients with haematological malignancies suffering from CDC was analysed on the LCD chip and overall 11 fungal pathogens could be detected in eight liver biopsies, supporting the clinical diagnosis of HCI/CDC. Analysis of liver biopsies from controls was negative for fungal DNA in all samples studied. In conclusion, the novel LCD chip technique examined in our study was able to detect fungal pathogens in liver biopsies from patients with haematological malignancies and suspected HCI/CDC but was negative in control biopsies.
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