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Is it really an ear infection? | Miami Herald

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Latest News

Is it really an ear infection?

MELINDA WENNER MOYER

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January 11, 2013 06:00 AM

Last March, while on vacation in Florida, my 11-month-old came down with a fever. We took him to a local pediatrician who quickly diagnosed him with a middle ear infection and prescribed him a 10-day course of antibiotics. Two days later, back home in New York, our pediatrician said our son probably never had an ear infection, and that regardless, he should stop taking the drugs.



At the time, I was exceptionally annoyed. What irked me wasn't just the misdiagnosis; it was that he had recommended unnecessary drugs that may have upset my baby's stomach and potentially, research suggests, increased his risk for asthma and irritable bowel disease. But it turns out Dr. Florida's actions were less the exception than the rule: Many U.S. pediatricians overdiagnose and overtreat ear infections, in part because of how difficult it is to accurately perform ear exams and in part because doctors feel you breathing down their stethoscope-adorned necks for the meds.

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To make things even more complicated, the microbes that cause ear infections are changing: Vaccines have shifted the microbial flora blooming in American children, and thanks in part to routine antibiotic overuse, some bugs have become much harder to treat.





Common in the wintertime, middle ear infections — technically called acute otitis media, not to be confused with outer ear infections (swimmer's ear) or rare inner ear infections — aren't a big deal. Nearly 80 percent of American kids have had one by the time they turn 3; many seem to battle them constantly — perhaps yours?





No one knows why some kids are more prone to them than others, but some research suggests that genetics plays a role, and environmental factors such as day care, exposure to tobacco smoke and formula feeding are known to boost the risk as well.





Ear infections can, however, be more than just a painful, oozing nuisance: They sometimes cause fluid to build up in the middle ear, leading to long-term hearing loss and language and literacy problems, and maybe even picky eating. Serious infections, left untreated, can also cause meningitis or mastoiditis, an infection of the mastoid bone in the skull, which requires surgery.





So, no, ear infections should not just be ignored. But a 2008 French study reported that one-fifth of ear infections diagnosed by general practitioners are in reality something else, like minor ear inflammation; 7 percent of the time, doctors deem perfectly healthy ears infected. Why is ear health such a medical mystery? Fevers, ear pulling and ear pain don't necessarily predict the presence of an infection, so doctors have to examine the middle ear to be sure — and that's really hard to do to a sick child. Doctors typically have to insert an instrument into the kid's ear, establish an airtight seal, squeeze a rubber bulb to release several bursts of air, and then watch to see how the child's eardrum responds.





Oh, and if there's any earwax, the doc has to pluck it out with tweezers and try the whole thing again. As you can imagine, this doesn't always go well, so many pediatricians end up just peering into your kid's ear, seeing a little redness and guessing at a diagnosis instead.





Even if a doctor is certain of an infection, there's the problem of knowing what kind of ear infection it is. Some are caused by viruses, which are immune to antibiotics, whereas others arise because a respiratory virus like the cold or flu made it easier for pre-existing bacteria to grow in the middle ear canal. The only way a doctor can tell an infection's microbial origin is by inserting a needle into a child's eardrum and aspirating out some of the middle ear fluid, which thankfully few doctors do.





Problem is, without knowing what's causing an infection, it's difficult to know how best to treat it. Since 2004, the American Academy of Pediatrics has advised doctors against giving antibiotics to kids over the age of 2 if their ear infections are not severe. (All children under 6 months should get antibiotics, and kids between 6 months and 2 years should get them only if the doctor is absolutely certain of the infection, which is apparently only half the time.)





Under this "watchful waiting" approach, doctors are supposed to re-examine the child a few days later to see if the infection is getting better; if it's not, drugs then might be in order.





There's a good reason for this conservative approach: No matter what their cause, most ear infections go away on their own. In a 2011 clinical trial, University of Pittsburgh researchers reported that 74 percent of children under 2 who were suffering from ear infections got better after one week when they weren't given any treatment; 80 percent of those who got antibiotics got better in the same time frame. Yet half of the kids treated with antibiotics in the study got bouts of diarrhea, compared with only 27 percent of the kids who didn't take anything.





So, yes, after a week on amoxicillin your son finally stopped wailing, waking in the night, and tugging at his ear. But that could very well have been just because time had passed and his immune system fought the bug off.

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