Microbiology Lecture Chapter 25 - Microbial Diseases of the Digestive System

Helpfulness: 0
Set Details Share
created 8 years ago by mermaidsmom
488 views
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

Diseases of the digestive tract are the _____ most common type of disease in the US.

second

2

Typical transmission is the _______ route.

fecal-oral route

3

Digestion

food is broken down

4

Absorption

food is absorbed in the small instestine

5

Distribution

food is taken up by blood and lymph and transferred to body cells

6

Further absorbtion

further absorption in large intestine of water, nutrients and vitamins (produced by some bacteria)

7

elimination

undigested food (feces) is eliminated from body
microbially produced gas expelled (2-L per day)

8

Liver produces bile and bile salts inhibit

gram (-) bacteria

9

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
paneth cells
defensins-
Peyers patches
-M cells
Phagocytic cells

10

Peyer's patches are secondary ______ ________ on the intestinal wall.

lymphoid organs

11

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.

true

12

Paneth cells are found in the _______.

crypts in the small intestines /illium

13

Are cavities a transmissible disease?

yes

14

True or false they have found 700 species of microbes in a human mouth?

true

15

bacteria live on ______ in the saliva in your mouth.

protein, old food not washed off, sugar

16

Biofilm is?

plaque

17

Plaque can be ____-______ cells thick.

500-700

18

Bacteria breaks down ______ which produces ______
that break down tooth ________.

sugars
acids
enamel

19

____ of lymphoid tissue is in the _______.

80%
GI tract

20

Does the normal digestive system contain normal microbiota?

yes

21

Typhoid fever is caused by

salmonella

22

What causes peptic ulcers?

Helicobacter pylori