Methicillin-resistant Staphylococcus aureus: an overview of basic and clinical research.

Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most successful modern pathogens. The same organism that lives as a commensal and is transmitted in both health-care and community settings is also a leading cause of bacteraemia, endocarditis, skin and soft tissue infections, bone and joint infections and hospital-acquired infections. Genetically diverse, the epidemiology of MRSA is primarily characterized by the serial emergence of epidemic strains. Although its incidence has recently declined in some regions, MRSA still poses a formidable clinical threat, with persistently high morbidity and mortality. Successful treatment remains challenging and requires the evaluation of both novel antimicrobials and adjunctive aspects of care, such as infectious disease consultation, echocardiography and source control. In this Review, we provide an overview of basic and clinical MRSA research and summarize the expansive body of literature on the epidemiology, transmission, genetic diversity, evolution, surveillance and treatment of MRSA.

Detection of Biomarkers of Periodontal Disease in Human Saliva Using Stabilized, Vertical Flow Immunoassays.

We report methods for stabilizing cellulose-based immunoassays and using this platform to analyze human saliva. Stabilization treatments of immunoassays for matrix metalloproteinases (MMP)-8 and -9, biomarkers of periodontal disease, were conducted and compared, revealing that anti-MMP-8 and -9 capture antibodies could be stabilized with the addition of a 5% trehalose solution to the test zones, followed by drying in a vacuum oven. After stabilization, the paper devices retained equivalent binding activity to that of freshly prepared tests for 14 days-a time frame that enables US-based clinical testing of this diagnostic assay. A saliva pretreatment method was developed to remove viscous elements without reducing the concentration or binding activity of dissolved proteins. Immunoassays were stored in ziplock bags containing desiccant, and used to detect nanomolar concentrations of MMP-9 in human saliva across the relevant clinical concentration range. These methods and findings facilitate rapid, affordable validation studies of this and other biomarkers that are found in saliva using vertical flow immunoassays.

Chronic desquamative gingivitis in siblings: A report of two cases.

Desquamative gingivitis is a gingival response associated with a variety of clinical conditions and characterized by intense erythema, desquamation and ulceration of free and attached gingiva. A variety of diseases such as lichen planus, pemphigus, pemphigoid, dermatitis herpetiformis, linear IgA disease, lupus erythematosus, erythema multiformae manifest clinically as desquamative gingivitis. Of all the disease entities, Lichen Planus is a relatively common disorder affecting the skin and mucous membrane. Very often it has oral manifestations. These lesions of oral lichen planus (OLP) have myriad but distinct morphology. As they mimic other mucocutaneous disorders with regard to clinical appearance, many lesions of oral lichen planus go undiagnosed or are wrongly diagnosed. Reported here are two cases of desquamative gingivitis. One of these was diagnosed as erosive lichen planus based on the symptoms, clinical findings, histologic, and immunofluorescent examination. Further management was done in consultation with a dermatologist.