Strep Throat in Baby or Toddler
The short answer
Strep throat (Group A Streptococcus infection) is uncommon in babies under 2 years but can occur in toddlers. It is most common in children ages 5-15. In toddlers, strep may present differently than in older children - instead of the classic sore throat, toddlers may have low-grade fever, irritability, decreased appetite, runny nose, and swollen lymph nodes. A rapid strep test or throat culture is needed for diagnosis. Strep throat requires antibiotic treatment (usually amoxicillin for 10 days) to prevent complications including rheumatic fever.
By Age
What to expect by age
Strep throat is very rare in babies under 1 year, partly because maternal antibodies offer some protection and partly because babies have less exposure. If a baby has a sore throat, it is almost always caused by a virus, not strep. However, babies can carry Group A Strep and may develop a "streptococcal fever" with irritability, low-grade fever, nasal discharge, and decreased appetite without the classic sore throat. If a household member has confirmed strep, mention this to your pediatrician.
Strep throat in toddlers often looks different from the classic presentation in older children. Toddlers may have: fever, irritability, decreased appetite, thick or bloody nasal discharge, swollen tender lymph nodes in the neck, and a widespread fine red rash (scarlet fever). They may not complain of a sore throat. A rapid strep test can be done at the pediatrician's office. If positive, antibiotics (typically amoxicillin for 10 days) are prescribed. Your child is no longer contagious after 24 hours of antibiotics. Complete the full antibiotic course even if symptoms improve.
What Should You Do?
When to take action
- A sore throat with a runny nose, cough, and hoarse voice (more likely viral, not strep)
- Mild throat redness during a cold
- Sore throat that improves within 2-3 days without treatment (likely viral)
- Sore throat with fever above 101 degrees F (38.3 degrees C) and no cough (this pattern suggests strep)
- A household member has confirmed strep throat
- Sore throat lasting more than 2-3 days
- Your child has a fine, sandpaper-like rash along with fever and sore throat (possible scarlet fever)
- Difficulty breathing or swallowing
- Drooling because swallowing is too painful
- Muffled voice or inability to open the mouth fully (possible peritonsillar abscess)
- High fever with a severely ill-appearing child
- Joint pain or swelling developing after a strep infection (possible rheumatic fever)
Sources
Related Resources
Related Medical Concerns
Scarlet Fever in Babies and Toddlers
Scarlet fever is a bacterial infection caused by group A streptococcus (the same bacteria that causes strep throat). It produces a distinctive rough, sandpaper-like red rash along with fever and often a sore throat. While the name sounds alarming, scarlet fever is very treatable with antibiotics and is not more dangerous than strep throat itself. Most children recover fully within a week of starting treatment.
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