811 W. John Street, Yorkville, IL 60560
For 24/7 Mental or Public Health Emergencies, call 630-553-9100
Mon 8:30am - 4:30pm  •  Tue - Thu 8:30am - 7:00pm  •  Fri 8:30am - 4:30pm

Streptococcal Disease

(Streptococcal Sore Throat, Scarlet Fever)



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Group A Beta Hemolytic Streptococci

Signs and Symptoms

High fever, sore throat with pain on swallowing and vomiting. Within 12 hours of onset of rash can develop. Most common in children aged 5 to 10 especially during the months of October to April.

Incubation Period

Time from contact to the development of signs and symptoms usually 28 to 72 hours after close contact. Incidence is highest among small children.

Mode of Transmission

Usually by direct or intimate contact via airborne droplets, i.e.: sneezing and coughing. Occasionally transmitted via contaminated food. Treated cases usually do not transmit after 48 hours. Untreated cases can transmit as long as 21 days.

Period of Communicability

If untreated, uncomplicated cases 10-21 days.

Preventive Measures

Stressing the need for bed rest and isolation from others until antibiotic treatment is effective, completing medication, hand washing and properly disposing of soiled tissues.

Implications for School

Exclude those with respiratory illnesses or skin lesions from food handling. Exclude student from school for at least 24-48 hours, until antibiotic therapy begins. Student must have a note from a healthcare provider to return to school.

Serving the Residents of Kendall County Since 1966
811 W. John Street, Yorkville, IL 60560   •   630-553-9100