wk 5 2 - GI pathogens

Question 1

3 examples of abiotic resistance for bacteria

Answer 1

pH
temp
salinity

Question 2

biotics restance to bacteria 3

Answer 2

competition
antagonism
attacking

Question 3

outline how a pathogen infects 6

Answer 3

exposure
adhesion 
invasion 
colonisation 
toxicity 
tissue damage + disease

Question 4

t/f complement system only activates for bacteria

Answer 4

true

Question 5

viruses would cause an elevated response by 2

Answer 5

t cells
b cells (+antibodies)

Question 6

define cholangitis

Answer 6

infection of common bile duct

Question 7

type of bacteria which ferments sugar

Answer 7

enterobacteriaceae
non-spore forming
(gram-ve, e.coli,salmonella ect)

Question 8

4 factors which allow enterobacteriaceae cause disease

Answer 8

motility - (flagella moves, klebsiella doesnt)
colonisation - fimbriae allows tight binding
endotoxin
enterotoxin (shiga toxin)

Question 9

which 2 species are difficult for MALDI-TOF to differentiate

Answer 9

e.coli

salmonella

Question 10

all enterobacteriaceae are negative in an oxidative test except

Answer 10

plesiomona shigelloides

Question 11

4 gram +ve species may be found in mouth

Answer 11

strep viridans 
neisseria sp.
anaerobes
candida sp, 
staphylococci

Question 12

faecal flore 3

Answer 12

coliforms
anaerobes
enterococcus faecalis

Question 13

t/f strict anaerobes will grow in Oxygen

Answer 13

false
clostridium sp,
bacteriodes sp,
anaerobic cocci #