most helpful answer that would be difficult to accurately determine since some people can harbor strep for years. i would assume that your son was more contagious within a day of his symptoms. strep can be passed on to others for about a day after an appropriate treatment has started. not all people are susceptible to getting strep easily since our immune system does a good job fighting it off. your other children have just as much chance of getting it from someone else at school than from a sibling. make sure your son with the strep does not share a drink/glass and change his toothbrush to a new one. if the toothbrushes are thrown into a drawer where they can touch other toothbrushes this is a good way to pass it on.
my son has strep throat. how long before his symptoms started showing was he contagious? . our doctor confirmed strep but i forgot to ask: how long before his symptoms started showing was he contagious? and how long does the bug take to incubate? how long to stop actively looking for symptoms in my other children?