Role of (1-3)-Β-D-Glucan Test in the Diagnosis of Invasive Fungal Infections among High-Risk Patients in a Tertiary Care Hospital.

Background Invasive fungal infections (IFI) are associated with high mortality. Serum fungal biomarkers offer an advantage over the traditional methods in early diagnosis and better clinical outcomes. The aim of the study was to evaluate the role of (1-3)-ß-D-glucan (BDG) assay in the patients suspected of IFI. Materials and Methods This prospective study was conducted in the Department of Microbiology, Dayanand Medical College and Hospital, Ludhiana, over a period of 1 year. A total of 862 serum samples were received from patients suspected of IFI, for the BDG test (Fungitell, Associates of Cape Cod Inc., USA). The test was performed as per kit protocol. Appropriate samples were processed for KOH fungal smear and fungal culture. Blood culture was done by Bactec (Biomerieux). Statistical Analysis Results were analyzed using descriptive statistical methods. Sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) were calculated at different cutoffs. In addition, the receiver operating characteristic (ROC) curve using SPSS 21.00 software was calculated and the diagnostic accuracy was shown by the area under the ROC curve (AUC). Results Among 862 patients, 546 (63.3%) were males. The predominant age group (25.6%) was between 61 and 70 years. The most common risk factor (54.8%) was prolonged intensive care unit stay. Out of the total samples, 455 (52.8%) samples were found positive for BDG. Fungal elements were seen in 48 (10.5%) KOH smears and fungal growth was obtained in 81 (17.8%) cultures. Comparison of BDG assay and culture at different cutoffs yielded AUC-0.823. Sensitivity (100%), specificity (51.3%), accuracy (55.6%), PPV (15.8%), and NPV (100%) were observed at the kit cutoff of 80 pg/mL. Optimum sensitivity and specificity of 79.2% and 70.3%, respectively, were observed at a cutoff of 142.4pg/mL. A significant correlation was observed between BDG positivity and piperacillin-tazobactam use and dialysis. Among BDG positive patients, 38(8.4%) succumbed to death. Conclusion Detection of BDG helps in the early diagnosis of IFI in critically ill patients. As the assay has a high NPV, a negative test can be used to stop the empirical antifungal drugs. The use of a higher cutoff can be useful to avoid false-positive results.

Cerebral Phaeohyphomycosis due to Cladophialophora bantiana - A Case Report and Review of Literature from India.

Cerebral phaeohyphomycosis is a rare disease caused by dematiaceous fungi. It has poor prognosis irrespective of the immune status of the patient. Cladophialophora bantiana is the most commonly isolated species. We report a case of multiple brain abscesses caused by C. bantiana in an immune competent patient. The diagnosis was based on CT scan of head, direct examination and culture of the aspirate from the abscess. Despite complete surgical resection of the abscesses and antifungal therapy with amphotericin B and voriconazole the patient could not be saved. All the cases of cerebral phaeohyphomycosis due to this rare neurotropic fungus reported from India between 1962 and 2009 have also been reviewed.

Liver function tests in patients with dengue viral infection.

To assess the frequency and degree of hepatic dysfunction in patients with dengue infection, records of214 serologically confirmed cases of dengue infection with available biochemical liver tests, admittedto our tertiary-care institute, were analysed. Patients were classified as classical dengue fever (DF) –81.3%, dengue haemorrhagic fever (DHF) – 13.6% and dengue shock syndrome (DSS) – 5.1%. Themean age was 31.6 years (male:female = 3.3:1). Deranged total bilirubin, aspartate aminotransferase(AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), albumin and prothrombin timeindex (PTI) [international normalized ratio (INR)] was present in 19.5% (29/143), 97.7% (209/214),93.9% (199/214), 32.6% (47/144), 29.1% (44/151) and 15.5% (22/156) patients respectively. Themean (± SE) total bilirubin, AST, ALT, ALP, albumin and INR values were 0.93 ± 0.09 mg/dl, 353.7 ±49.6 U/L, 218.6 ± 27.2 U/L, 135.2 ± 6.5 U/L, 3.2 ± 0.04 g/dl and 1.2 ± 0.03 respectively. The meanvalue of AST was significantly higher than ALT. The degree of rise of AST and ALP was significantly morein DHF and DSS, as compared to DF; but the frequency of rise was similar in all groups. Mean serumbilirubin, ALT and ALP values were significantly higher in patients with haemorrhage as compared tothose without haemorrhage, in patients with secondary dengue infection as compared to primary infection, and in non-survivors. Hepatic dysfunction was very common in all forms of dengue infection,with AST rising significantly more than ALT. Serum bilirubin, ALT and ALP were significantly higher inpatients with DSS, haemorrhage, sequential infection and non-survivors. While preferentially high AST may serve as an early indicator of dengue infection, high bilirubin, ALT and ALP may act as poorprognostic markers.