Elderly Hospitalised Patients-The Impact of Itch and its Prevalence.

INTRODUCTION: Pruritus in elderly patients can have a significant impact on the quality of life but may be underestimated and poorly addressed by healthcare professionals. MATERIALS AND METHODS: From March to May 2010, a structured interview questionnaire including the Dermatology Life Quality Index (DLQI) was administered to all patients admitted to the geriatric ward in Changi General Hospital, Singapore, except for those with cognitive impairment. RESULTS: A total of 194 patients were enrolled in the study; 94 patients (48.5%) were experiencing itch at the point of the interview; mean DLQI score for patients with itch was 6.7; 35.1% of patients experienced sleep disruption whilst 30.9% reported impairment of concentration levels as a consequence of their itch. Of the patients who had informed their doctor about the problem, 73.7% felt that doctors had not adequately addressed the cause of the itch. Among patients who reported itch, the DLQI score correlates with the severity of pruritus with a regression coefficient of 0.2737 (P <0.001); 9.6% of patients with itch were independent with their activities of daily living compared to 21% of patients who did not experience itch. CONCLUSION: Almost half of the subjects in our study experienced itch and a third of them reported impairment of quality of life. Patients who were independent of their activities of daily living were also less likely to experience itch. This study highlights the importance of increasing awareness of pruritus among physicians as pruritus can have adverse consequences on patients' quality of life when left unaddressed.

Development and clinical validation of a multiplex real-time PCR assay for herpes simplex and varicella zoster virus.

Herpes simplex virus (HSV) and varicella zoster virus (VZV) are related members of the Herpesviridae family and are well-documented human pathogens causing a spectrum of diseases, from mucocutaneous disease to infections of the central nervous system. This study was carried out to evaluate and validate the performance of a multiplex real-time polymerase chain reaction (PCR) assay in detecting and differentiating HSV1, HSV2, and VZV from clinical samples. Consensus PCR primers for HSV were designed from the UL30 component of the DNA polymerase gene of HSV, with 2 separate hydrolysis probes designed to differentiate HSV1 and HSV2. Separate primers and a probe were also designed against the DNA polymerase gene of VZV. A total of 104 clinical samples were available for testing by real-time PCR, conventional PCR, and viral culture. The sensitivity and specificity of the real-time assay was calculated by comparing the multiplex PCR result with that of a combined standard of virus culture and conventional PCR. The sensitivity of the real-time assay was 100%, with specificity ranging from 98% to 100% depending on the target gene. Both PCR methods detected more positive samples for HSV or VZV, compared with conventional virus culture. This multiplex PCR assay provides accurate and rapid diagnostic capabilities for the diagnosis and differentiation of HSV1, HSV2, and VZV infections, with the presence of an internal control to monitor for inhibition of the PCR reaction.

Fluorescence in situ hybridization (FISH) as an aid for the diagnosis of graft-versus-host disease in two multivisceral organ transplant patients.

We herein describe 2 cases of adult multivisceral transplant patients who developed graft-versus-host disease manifesting predominantly as lichenoid skin papules and plaques. The diagnosis was supported by histopathology but ultimately corroborated by the utilization of the fluorescence in situ hybridization (FISH) technique using X and Y chromosome probes on unstained biopsy slides. In both cases, FISH revealed a high percentage of donor-derived cells as part of the inflammatory infiltrate in the skin biopsy. This report adds to the previous publications showing the utility of FISH in corroborating the diagnosis of graft-versus-host disease in transplant patients with unmatched sex donor.

Presumed dapsone-induced drug hypersensitivity syndrome causing reversible hypersensitivity myocarditis and thyrotoxicosis.

INTRODUCTION: A 22-year-old Malay soldier developed dapsone hypersensitivity syndrome 12 weeks after taking maloprim (dapsone 100 mg/pyrimethamine 12.5 mg) for anti-malarial prophylaxis. CLINICAL PICTURE: He presented with fever, rash, lymphadenopathy and multiple-organ involvement including serositis, hepatitis and thyroiditis. Subsequently, he developed congestive heart failure with a reduction in ejection fraction on echocardiogram, and serum cardiac enzyme elevation consistent with a hypersensitivity myocarditis. TREATMENT: Maloprim was discontinued and he was treated with steroids, diuretics and an angiotensin-converting-enzyme inhibitor. OUTCOME: He has made a complete recovery with resolution of thyroiditis and a return to normal ejection fraction 10 months after admission. CONCLUSION: In summary, we report a case of dapsone hypersensitivity syndrome with classical symptoms of fever, rash and multi-organ involvement including a rare manifestation of myocarditis. To our knowledge, this is the first case of dapsone-related hypersensitivity myocarditis not diagnosed in a post-mortem setting. As maloprim is widely used for malaria prophylaxis, clinicians need to be aware of this unusual but potentially serious association.