References . . . . . . . . . . . . . 79 Subject Index . . . . . . . . . . . . . . . . . . . 93 VII Abbreviations AB Alcian blue AB-PAS Alcian blue - periodic acid Schiff ABC avidin biotin complex a...

In the intestine, a unique immunological system that is different from the systemic immune system exists to provide adaptive immunity in response to luminal bacteria and dietary antigens. There are...