incubation period for strep throat
1 Close contact with strep: the child lives in a home where a sibling, parent or other household member has a throat culture or rapid-strep test that is positive for strep throat. 2  Usually the contact is within the previous 7 days (reason: incubation period for strep is 2 to 5 days).ymptom Definition. 1  Close contact with strep: the child lives in a home where a sibling, parent or other household member has a throat culture or rapid-strep test that is positive for strep throat. 2  Usually the contact is within the previous 7 days (reason: incubation period for strep is 2 to 5 days).