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October 14, 2013
5 myths about lice parents should know, from a Loyola infectious disease expert
MAYWOOD, Ill. – Perhaps nothing terrifies a parent so much as a note home from school that a case of lice has been detected.
According to the Centers for Disease Control and Prevention (CDC), an estimated 6 million to 12 million infestations occur each year in the United States among children 3 to 11 years of age.
But Dr. Andrew Bonwit, a pediatric infectious disease expert at Loyola, said the bite will rarely, if ever, be painful. It is more likely to itch. “Lice cause more emotional distress than any real physical harm,” he said. “The infestation is usually a nuisance and almost never a serious problem in itself."
“Parents and school staff may become understandably upset by outbreaks of head lice, but it is important to remember that if the problem occurs, it is treatable, although repeat applications of medicine are usually needed,” said Bonwit, who is also an assistant professor, pediatric infectious disease, Loyola University Chicago Stritch School of Medicine.
Bonwit’s Top Tall Tales about Lice
Myth 1. Lice are caused by being dirty. “Personal hygiene and socioeconomic status have nothing to do with having or transmitting head lice. The head louse is an equal opportunity pest!"
Myth 2. Pets spread lice. “Animals are not known to carry head lice nor to transmit them to people."
Myth 3. Beware sharing hairbrushes and personal items to avoid lice. “Although it’s probably best not to share such items as combs, hairbrushes and hats, these do not seem to transmit the pest. Transmission of lice seems to occur only by direct head-to-head contact from one person to another."
Myth 4. Kids with lice should be sent home from school immediately. “The American Academy of Pediatrics does not endorse “no-nit” policies that exclude children from school because nits are present. In fact, even the presence of mature head lice is not considered a valid reason to exclude children, only a cause for prompt referral to the physician for treatment."
Myth 5. Lice carry disease. “Head lice do not transmit serious infectious disease."
The Truth about Lice
“Lice are very small, about the length of George Washington’s nose on a quarter,” Bonwit said. “The lice produce eggs, called nits, which become strongly cemented to the host’s hair shafts.” When an infestation occurs, live lice may be visible and the nits may be seen as tiny, dark dots on the side of the hair shafts.
“Sometimes patients get so itchy that they scratch the scalp to the point of minor skin infections and even cause some enlarged lymph nodes on the back of the neck or behind the ears,” Bonwit said. “While these changes may alarm parents, they aren’t directly harmful.” A child’s physician can prescribe remedies to clear up those secondary problems.
Getting Rid of Lice
The most common treatment is over-the-counter or prescription insecticidal shampoos or lotions applied to the scalp, left on for a specified time and rinsed off. You must also use a fine-toothed comb to remove as many “nits” or eggs as possible to prevent further infestation.
“The life cycle is about seven days from the laying of the eggs to the hatching, so a second insecticide treatment is recommended after the first application,” Bonwit said. “If the treatments are used as directed, problems other than scalp irritation are unlikely to occur.”
Loyola University Health System (LUHS) is a member of Trinity Health. Based in the western suburbs of Chicago, LUHS is a quaternary care system with a 61-acre main medical center campus, the 36-acre Gottlieb Memorial Hospital campus and more than 30 primary and specialty care facilities in Cook, Will and DuPage counties. The medical center campus is conveniently located in Maywood, 13 miles west of the Chicago Loop and 8 miles east of Oak Brook, Ill. The heart of the medical center campus is a 559-licensed-bed hospital that houses a Level 1 Trauma Center, a Burn Center and the Ronald McDonald® Children's Hospital of Loyola University Medical Center. Also on campus are the Cardinal Bernardin Cancer Center, Loyola Outpatient Center, Center for Heart & Vascular Medicine and Loyola Oral Health Center as well as the LUC Stritch School of Medicine, the LUC Marcella Niehoff School of Nursing and the Loyola Center for Fitness. Loyola's Gottlieb campus in Melrose Park includes the 255-licensed-bed community hospital, the Professional Office Building housing 150 private practice clinics, the Adult Day Care, the Gottlieb Center for Fitness, Loyola Center for Metabolic Surgery and Bariatric Care and the Loyola Cancer Care & Research at the Marjorie G. Weinberg Cancer Center at Melrose Park.