Final answer:
Pharyngitis (strep throat) and scarlet fever are associated with bacterial infections caused by Streptococcus pyogenes.
Step-by-step explanation:
Pharyngitis (strep throat) and scarlet fever are both associated with bacterial infections. They are caused by the bacterium Streptococcus pyogenes, also known as group A streptococcus (GAS). Strep throat is characterized by symptoms such as sore throat, fever, inflammation of the pharynx and tonsils, swollen lymph nodes, and sometimes a rash known as scarlet fever.