Bacteroidales

Question 1

Bacteroidales

Gram

Answer 1

Gram− bacteria of the human colon/oral cavity

Bacteroides

Question 2

Bacteroidales

Strict…..

Answer 2

Strict anaerobes
Commensals
Opportunistic pathogens

Question 3

Bacteroides fragilis

Answer 3

most frequently isolated from clinical specimens of abscesses caused by intestinal bacteria
-most oxygen-resistant Bacteroides

Question 4

Virulence Factors:

Answer 4

Superoxide dismutase - detoxifies oxygen radicals
Ø Catalase - breaks down hydrogen peroxide
Ø Polysaccharide capsule

Question 5

Disease

Answer 5

caused when bacteria are introduced into deep tissues

• peritonitis - rupture of infected appendix/diverticulum
• pulmonary abscess - aspiration of oropharyngeal bacteria

Question 6

peritonitis

Answer 6

rupture of infected appendix/diverticulum

Question 7

pulmonary abscess

Answer 7

aspiration of oropharyngeal bacteria

Question 8

polymicrobial diseases

Answer 8

biphasic - start with acute inflammation
progress to formation of localized abscesses
bacterial composition changes as disease progresses
100’s of different species in inoculum
few species in abscess

Question 9

biphasic

Answer 9

start with acute inflammation

progress to formation of localized abscesses

Question 10

polymicrobial diseases

bacterial composition changes

Answer 10

as disease progresses
100’s of different species in inoculum
few species in absces