Dermatology, Infections / 06.03.2026
Why Over-the-Counter Lice Treatments Often Fail — and How Professional Nit Removal Solves the Problem
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CDC image[/caption]
Every year, an estimated 6–12 million children in the United States between the ages of 3 and 11 contract head lice (Pediculus humanus capitis). For most families, the first response is a trip to the pharmacy — and that response is increasingly likely to fail. Decades of widespread, often incorrect use of over-the-counter (OTC) pediculicides has driven a well-documented phenomenon: the emergence of "super lice," strains that carry genetic mutations conferring near-complete resistance to the insecticides most commonly found on pharmacy shelves.
This article examines the clinical and biological reasons OTC treatments fail so frequently, reviews what the research literature says about resistance and re-infestation, and explains why professional nit removal services represent the most evidence-aligned path to genuine, lasting resolution.
CDC image[/caption]
Every year, an estimated 6–12 million children in the United States between the ages of 3 and 11 contract head lice (Pediculus humanus capitis). For most families, the first response is a trip to the pharmacy — and that response is increasingly likely to fail. Decades of widespread, often incorrect use of over-the-counter (OTC) pediculicides has driven a well-documented phenomenon: the emergence of "super lice," strains that carry genetic mutations conferring near-complete resistance to the insecticides most commonly found on pharmacy shelves.
This article examines the clinical and biological reasons OTC treatments fail so frequently, reviews what the research literature says about resistance and re-infestation, and explains why professional nit removal services represent the most evidence-aligned path to genuine, lasting resolution.
Dr. Crosbie[/caption]
Eric Crosbie, PhD, MA
Assistant Professor
School of Community Health Sciences
Ozmen Institute for Global Studies
University of Nevada Reno
MedicalResearch.com: What is the background for this study?
Response: My colleague Dr. Laura Schmidt and I established a framework for studying preemption (when a higher level of government limits the authority of lower levels to enact laws) by studying the 
Dr. Sachdev[/caption]
Darpun D. Sachdev, M.D.
Case investigation and Contact tracing Branch Chief
SFDPH Covid Command Center
San Francisco Department of Public Health
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: The ultimate goal of contact tracing is to rapidly identify and isolate contacts who are COVID-19 positive before they have time to transmit to others. As mentioned in the published research letter by SFDPH, through JAMA, during early shelter-in-place (from April to June 2020), our contact tracing program successfully reached greater than 80% of cases and contacts within a median timeframe of 6 days from the onset of their case’s symptoms. Approximately 10% of named contacts were newly diagnosed with COVID-19 (compared to 2% positivity during this time period). Household contacts made up approximately 80% of all identified contacts, but 90% of contacts who tested positive lived in the same household as the case. Secondary cases (contacts who were found to be newly diagnosed with COVID-19) were traced and quarantined within 6 days of the case’s symptom onset.
With that said, the 6-day time difference between symptom onset and contact notification raises concern regarding the overall effectiveness of tracing in preventing onward transmission by infected contacts. We are working with community-based organizations to scale up access to testing and culturally competent tracing and wraparound services. Currently, we have now decreased the time difference to 5 days. Moreover, given that the majority of contacts resided in the same household, transmission could have occurred presymptomatically such that by the time infected contacts were identified, they might have already transmitted the virus. Hence, why SFDPH, on May 5, 2020, implemented the recommendation of universal testing for COVID-19 contacts, regardless of symptoms.
We recommend that testing should be offered to all contacts regardless of symptoms and encourage local health departments to adopt novel ways of increasing testing access for contacts.
Leighton Ku, PhD, MPH
Professor, Dept. of Health Policy and Management
Director, Center for Health Policy Research
Milken Institute School of Public Health
George Washington University
Washington, DC 20052
MedicalResearch.com: What is the background for this study?
Response: In this study, we examined how requirements that low-income adults work in order to keep their food assistance benefits (SNAP, formerly called food stamps) affects the number of people receiving benefits. Briefly, we found, based on analyses of data from 2,410 counties from 2013 to 2017, that soon after work requirements are introduced, more than a third of affected participants lose their food assistance. This meant that about 600,000 poor adults lost food assistance very quickly.
This is important for two reasons:
(1) Work requirements create greater hardship, including food insecurity and increased risk of health problems, when poor people lose their nutrition benefits.
(2) The Trump Administration is trying to broaden this policy, expanding it further in SNAP, but also applying work requirements to Medicaid (for health insurance) and public housing benefits. This is a massive effort at social experimentation that will cause tremendous harm.
And the sad part is that we already know, from other research, that these work requirement programs do not actually help people get jobs, keep them or to become more self-sufficient. This is because the work requirements do not address the real needs of low-income unemployed people, to learn how to get better job skills or to have supports, such as child care, transportation or health insurance, that let them keep working.
Faiz Gani, PhD
Postdoctoral research fellow
Department of Surgery
Johns Hopkins University School of Medicine
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Firearm related injuries are a leading cause of injury and death in the United States, yet, due to combination of factors, limited data exist that evaluate these injuries, particularly among younger patients (patients younger than 18 years).
The objective of this study was to describe emergency department utilization for firearm related injuries and to quantitate the financial burden associated with these injuries.
In our study of over 75,000 emergency department visits, we observed that each year, over 8,300 children and adolescents present to the emergency department for the treatment / management of a gunshot injury. Within this sub-population of patients, we observed that these injuries are most frequent among patients aged 15-17 years and while these injuries decreased over time initially, were observed to increase again towards the end of the time period studied.
In addition to describing the clinical burden of these injuries, we also sought to describe the financial burden associated with these injuries. For patients discharged from the emergency department, the average (median) charge associated with their care was $2,445, while for patients admitted as inpatients for further care, the average (median) charge was $44,966.
Collectively these injuries resulted in $2.5 billion in emergency department and hospital charges over the time period studied. This translates to an annual financial burden of approximately $270 million.
