Q: Is Cefaclor effective for Mycoplasma pneumonia in a teenager with a fever and earache?

Medically reviewed by Sang Hyun Ahn, MD

Content edited by Myeongchan Kim, MD

This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.

Question:

Three days ago, my teenager complained of a fever, phlegm, and an earache. We visited the clinic, and the flu test came back negative. Since pneumonia and pertussis are going around, the doctor mentioned that we should test for Mycoplasma if the fever continues, but for now, they prescribed Cefaclor, an antibiotic.

For the first two days, the fever went over 38.5°C, so I gave them fever reducers. Now, it doesn't go over 38°C but lingers as a mild fever around 37.6°C. At night, it drops to the 36°C range. I feel like we should get the Mycoplasma test done. When I searched online, I read that macrolide antibiotics are the first line of treatment for Mycoplasma, and if they don't work, a second-line antibiotic is used. It doesn't seem like Cefaclor is a macrolide antibiotic. Is this still considered a first-line treatment for Mycoplasma?

Answer:

It is completely understandable to be worried when your child has been struggling with a fever, phlegm, and ear pain for several days.

To answer your main question: Cefaclor is a cephalosporin antibiotic, and it is not effective against Mycoplasma pneumonia. Mycoplasma bacteria lack a cell wall, which means cephalosporin and penicillin antibiotics do not work against them. The first-line treatment for Mycoplasma is a macrolide antibiotic (such as azithromycin or clarithromycin).

Why might the doctor have prescribed Cefaclor?

Currently, your child has a mild fever (37.6°C), a negative flu test, phlegm, and notably, an earache. Cefaclor is highly effective for treating bacterial otitis media (middle ear infections) and sinusitis. It is very likely that the doctor prescribed Cefaclor to address the ear pain and a suspected bacterial infection in that area first. However, if Mycoplasma is the true cause of the illness, the antibiotic type will need to be changed.

What to discuss with your doctor:

Since the mild fever is persisting, it is best to follow up with your prescribing doctor. When you see or speak with them, you can ask:

1. "Do the current symptoms point more toward a bacterial ear infection or sinusitis rather than Mycoplasma?"

2. "Since the mild fever is continuing even while taking Cefaclor, should we switch to a macrolide antibiotic?"

3. "When is the best time to perform the Mycoplasma test?"

Home Care Instructions:

• Encourage your child to drink plenty of water and warm tea, which helps thin out and expel phlegm.

• A mild fever of 37.6°C can generally be observed without giving a fever reducer. You only need to give medication if the fever reaches 38.5°C or if your child is very uncomfortable.

When to seek immediate medical evaluation:

Please take your child to see a doctor on the same day if you notice any of the following:

• Difficulty breathing, shortness of breath, or chest pain.

• Discharge coming from the ear or worsening ear pain.

• A fever that lasts for more than 5 days or spikes again above 38.5°C.

• Refusal to drink water or eat, or no urination for more than 8 hours.

Since your doctor specifically mentioned testing for Mycoplasma if the fever continues, please contact the clinic or visit them again today or tomorrow to update them on your child's condition and discuss whether the antibiotic needs to be adjusted.

For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.

fevercoach.us

Apple App Store

Google Play

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