Hi and thanks for the query, The commonest cause of throat infections is Streptoccocus, so it could certainly be from it. However, what could differ from time to time is the species of the Strep. However, response to adequate treatment is usually favorable. Amoxicilline is you are taking at a recommended dose to me is very appropriate. failure to respond to this treatment after 7 to 10 days should demand a reevaluation. This could be due to an abscess that might require incision or the germ being resistant to the used antibiotic, which might require a different antibiotic., This explains why it is routine practice to do a throat culture and sensitivity testing prior to commencement of treatment with antibiotics. The possibility of Infectious Mononucleosis or viral origin is very unlikely under these circumstances and there is no need to panic with respect to the little one catching the infection as of now. Following normal hygienic practice, washing of hands before touching her and reporting back to your physician in case symptoms persist 7 to 10 days after you are on treatment for a proper clinical review is my advice. Kind regards, Bain LE, MD.