Microbiology Lecture Chapter 25 - Microbial Diseases of the Digestive System
Diseases of the digestive tract are the _____ most common type of disease in the US.
Typical transmission is the _______ route.
food is broken down
food is absorbed in the small instestine
food is taken up by blood and lymph and transferred to body cells
further absorption in large intestine of water, nutrients and vitamins (produced by some bacteria)
undigested food (feces) is eliminated from body
microbially produced gas expelled (2-L per day)
Liver produces bile and bile salts inhibit
gram (-) bacteria
Protection of the digestive system
High acidity of the stomach pH 2.0
lysozyme- break down any foreign pathogen
Crevicular fluid- produced by gums in mouth can kill microbes
Peyer's patches are secondary ______ ________ on the intestinal wall.
True or false. M cells are well adapted to take up antigens from the intestinal tract and allow their transfer to the lymphocytes and antigen presenting cells throughout the intestinal tract but especially in the Peyer's patches.
Paneth cells are found in the _______.
crypts in the small intestines /illium
Are cavities a transmissible disease?
True or false they have found 700 species of microbes in a human mouth?
bacteria live on ______ in the saliva in your mouth.
protein, old food not washed off, sugar
Plaque can be ____-______ cells thick.
Bacteria breaks down ______ which produces ______
that break down tooth ________.
____ of lymphoid tissue is in the _______.
Does the normal digestive system contain normal microbiota?
Typhoid fever is caused by
What causes peptic ulcers?