Final answer:
Streptococcus pyogenes, also known as Group A strep, is confirmed by a partial agglutination assay. This bacterium causes a variety of human diseases including strep throat, scarlet fever, and skin infections.
Step-by-step explanation:
The bacteria that is confirmed by partial agglutination assay is Streptococcus pyogenes, also known as Group A strep. This bacterium causes a variety of human diseases including strep throat, scarlet fever, and skin infections. The partial agglutination assay, developed by Rebecca Lancefield, uses antibodies to identify the M protein on streptococci, which is necessary for the bacteria's ability to cause disease.