The Widal test detects antibodies in the blood against the bacteria Salmonella typhi, which causes typhoid fever. A significant rise in antibody levels confirms the infection.
The Widal test detects antibodies in the blood against the bacteria Salmonella typhi, which causes typhoid fever. A significant rise in antibody levels confirms the infection.

Study the chemical structure of an addictive drug shown below and answer the questions that follow.