Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A, B) Serum anti-toxin A and B IgG levels respectively in patients without a history of C. difficile infection. (C, D) Anti-toxin A and B IgG levels respectively in patients with a history of C. difficile infection.
Data are for patients from whom three or more serum samples were obtained.
