Which of the Following Tests is an Agglutination Test for the Bacterium

Question

Which of the following tests is an agglutination test for the bacterium causing typhoid fever?
A)Quellung reaction
B)API 20E system
C)Widal test
D)IMViC

Accepted Answer

The Widal test is an agglutination test commonly used for the serodiagnosis of typhoid fever caused by Salmonella typhi. This test detects antibodies against S. typhi O and H antigens in the serum of patients. The other options are not related to the diagnosis of typhoid fever.