Complex sentence: The diagnosis of GABHS tonsillitis can be confirmed by culture and samples obtained by swabbing both tonsillar surfaces and the posterior pharyngeal wall are plated on sheep blood agar medium.
Split into simpler sentences: The diagnosis of GABHS tonsillitis can be confirmed by culture. Samples are obtained by swabbing both tonsillar surfaces and the posterior pharyngeal wall are plated on sheep blood agar medium.