" Strep Throat, or in technical terms, streptococcal pharyngitis, is an infection in the tonsils and larynx. This is a common illness in children ages 5 – 15. The main symptom is a sore throat. Keep in mind though, not all sore throats are strep throat. This main symptom is also accompanies by swollen tonsils, swollen lymph nodes, and a fever. To diagnose, a doctor will order a throat culture or rapid strep test. Strep throat can ...