Is herpes simplex a systemic disease?

Orofacial herpes simplex virus infections are usually caused by herpes simplex virus 1 (HSV-1), and HSV-2 infections have been accepted as a sexually transmitted disease. HSV establishes a latent infection in the dorsal root ganglia of the host and remains there for the rest of life. HSV affects mainly skin and genitalia, although in immunocompromised patients it may cause local infection with vast skin involvement, chronic herpetic ulcers, or widespread mucous membrane damage, as well as systemic infections localized in the central and peripheral nervous systems, gastrointestinal tract, and ocular system.

Herpes zoster as a systemic disease.

Herpes zoster (shingles, zona) is a viral infection commonly affliccting the skin and the nervous system with an overall occurring rate of 3 to 5 cases per 1000 persons per year, with higher rates in middle or later life. With the advancement of medicine, more and more case reports have started to emerge showing different incidences of VZV, some new localizations, clinical presentations, and complications, which break the well-known fact that "VZV affects the skin and nervous system." Skin lesions are the most important ones for the early and exact diagnosis of herpes zoster (HZ), due to its visibility and well-defined clinical picture of lesions.

Evidence-based medicine: facts and controversies.

Evidence-based medicine is a paradigm shift in the biomedical field toward scientific-based clinical practice. It is recognized as the process of acquiring and applying into practice the best available research findings in a defined filed. Although the roots of evidenced-based medicine date back more than 150 years, the modern evidenced-based medicine concept has been rapidly and constantly developing in the past two decades.

Ultrasonically assisted extraction of total phenols and flavonoids from Rhodiola rosea.

This work deals with ultrasonically assisted extraction (UAE) of biologically active compounds from rhizomes of Rhodiola rosea, a popular medicinal plant. The influence of temperature, type of solvent and solid/solvent ratio on the yield of total extracts, total phenols and flavonoids was established. The best extraction of total phenols and flavonoids was achieved by using 50% aqueous EtOH and MeOH, respectively.