Sore throat is the telltale sign. About one in 10 adults with a sore throat has strep, according to the C.D.C. 2023 April 14, Dani Blum, “Strep Is on the Rise. Here’s How to Minimize Your Risk.”, in The New York Times, →ISSN:
(countable, informal, uncountable) A streptococcus.
On my arrival at the nursery which (like so many of its kind) is tucked in the back of beyond, Rex was anxious to show me his beloved ‘streps’ (Streptocarpus) and seemed almost disappointed that I should insist instead on viewing his ‘chiris’ (Chirita). 2003, The Garden, volume 128, page 847:
I also have a WWW page with pictures if interested: […] look under the Convention '95 page, there are several streptos. Also look under "Take a bite of the strang stuff" for a view of a^([sic]) unifoliate strep. 1996 June 16, Justin Thyme, “Re: Streptocarpus”, in uk.rec.gardening (Usenet):