Gut-associated lymphoid tissue

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


The digestive tract's immune system is often referred to as gut-associated lymphoid tissue (GALT) and works to protect the body from invasion. GALT is an example of mucosa-associated lymphoid tissue.


About 70% of the body's immune system is found in the digestive tract. The GALT is made up of several types of lymphoid tissue that produce and store immune cells that carry out attacks and defend against pathogens.

New research indicates that GALT may continue to be a major site of HIV activity, even if drug treatment has reduced HIV count in the peripheral blood.[citation needed]


Lymphoid tissue in the gut is comprised of the following :

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