Photodynamic therapy targets oral dysplasia, oral bacteria

Source: www.drbicuspid.com Author: Kathy Kincade, Editor in Chief Imagine being able to treat a suspicious lesion on a patient's tongue simply by applying a topical agent, waiting a few minutes, then exposing it to light from a handheld laser or light-emitting diode (LED) device. Imagine being able to treat bacterial and fungal infections in the oral cavity, even periodontal disease, using this same approach. That is the promise of photodynamic therapy (PDT), a minimally invasive technique that first came into medicine in the early 1900s and has been used to treat a plethora of medical conditions, including skin diseases, localized infections, age-related macular degeneration, and premalignant and malignant disorders. "PDT in the oral cavity would utilize a photosensitizing compound and a light source to activate the compound," explained Thomas Mang, PhD, research director in the Laser and Lightwave Research Center at the University at Buffalo School of Dental Medicine. "Traditionally, it has been used in head and neck lesions and oral lesions with a photosensitizer given intravenously. But in applications related to early oral lesions and those involving candida and oral species that may be involved with periodontal disease, we look to apply it topically." Distinct advantages Mang has been investigating PDT disinfection of oral biofilm and previously was involved with the development of PDT for treating cutaneous and other cancers while at Roswell Park Cancer Institute. He sees a bright future for PDT in dentistry, providing more selectivity and flexibility when treating patients with early oral lesions and microbial [...]

Candidiasis: new agents for invasive infections

Source: www.clinicaladvisor.com Author: Carl Sherman Infection with the ubiquitous fungus Candida cuts across a broad spectrum of severity that ranges from common and superficial mucocutaneous variants to invasive disease that can be life-threatening. The addition of important new antifungal agents to the candidiasis armamentarium has led the Infectious Diseases Society of America to issue updated Clinical Practice Guidelines for the Management of Candidiasis to replace the 2004 version. These agents—the echinocandins caspofungin, anidulafungin, and micafungin—are essentially reserved for candidemia and other invasive forms of candidiasis. The Guidelines also incorporate new data on the treatment of mucocutaneous disease and on the prevention of invasive disease in high-risk patients. Office-based primary-care providers “probably see [relatively benign] aspects of candidiasis most often: oropharyngeal infection (thrush) and vaginitis. They will see Candida in urine, where the question is whether it is causing infection or just hanging out,” says Carol A. Kauffman, MD, professor of internal medicine at the University of Michigan in Ann Arbor, chief of infectious diseases in the VA Ann Arbor Healthcare System, and an author of the Guidelines. Candidemia and other forms of invasive candidiasis are generally encountered in the hospital setting (candidemia is the fourth most common nosocomial bloodstream infection in the United States) but may develop in community-dwelling patients as well (e.g., those who are leukemic, have an indwelling catheter, are on dialysis, or are receiving cancer chemotherapy via a port or central line), according to Dr. Kauffman. Muccocutaneous Candidiasis: Oropharyngeal infection, when mild, is best treated topically, with [...]

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