The Quellung reaction is a test to detect
A) hemolysins.
B) kinases.
C) pyrogens.
D) capsule antigens.
E) protein M.

Question

Quizplus · Accepted Answer

The Quellung reaction is a serological test used to detect the presence of capsule antigens in bacteria, particularly Streptococcus pneumoniae. The test involves adding specific antibodies to the bacterial sample, which can bind to the capsule antigens and cause them to expand or "swell" (a process called quellung), making them visible under a microscope. This test is commonly used for diagnosis of pneumococcal infections.

The Quellung Reaction Is a Test to Detect