MedicalResearch.com Interview with: [caption id="attachment_27707" align="alignleft" width="120"] Head Louse[/caption] William Ryan B.V.Sc. Ryan Mitchell Associates LLC Westfield, NJ and Bernard Cohen, MD Professor Dermatology and Ellen Koch, MD Division of Pediatric Dermatology Johns Hopkins Medicine, Baltimore, Maryland MedicalResearch.com: What is the background for this study? What are the main findings? Response: As a group we were concerned about the misinformation that continues to be promulgated on the internet and through other sites. Importantly, the group consisted of experts with specific experience in the management of head louse infestations, from pediatric dermatology, pediatrics, school nursing and head louse research fields. Even information sources that we would have expected to be credible are outdated, unreliable or both, often continuing myths about head louse infestations and how they can be controlled.  We wanted to provide a balanced and informed perspective that would help physicians and parents recognize that head louse infestations do not present a serious problem, and can be well managed with an informed approach to treatment. The main findings are that over the counder products (permethrin/pyrethrins) are unlikely to be effective, and that that there are safe and effective products that are available by prescription. Interestingly, head lice do affect Indian and African children in their home countries, but virtually nonexistent in African Americans in North America. There has been speculation about hair grooming regimen or structure of African American hair but the cause is unknown.  In a study we performed assessing resistance to over the counter pediculicide components over a decade ago in Baltimore, we were not able to find a single African American child with head lice. We were not able to recruit any patients from the Baltimore City Schools.