6 - anaerobic bacteria

Question 1

gram negative rods

Answer 1

porphyromonas
prevotella
bacteroides
fusobacterium

Question 2

gram positive rods

Answer 2

clostridium
lactobacillus
propionibacterium
actinomyces

Question 3

gram negative cocci

Answer 3

veillonella

Question 4

gram positive cocci

Answer 4

peptostreptococcus
anaerococcus
fine goldia
peptoniphilus

Question 5

anaerobic bacteria

Answer 5

commensal flora

requires special equipment to culture

Question 6

when to investigate anaerobic bacteria

Answer 6

presence on clinical. specimens not always significant

anaerobic bacteria found in normally sterile sites should be investigated

Question 7

labs will generally not attempt to culture anaerobes from specimens collected from

Answer 7

oropharynx, genital tract or bowel because cultures will always be positive

Question 8

culturing for anaerobic bacteria

Answer 8

○ Pus, fluid or tissue swaps usually not optimal because anaerobic bacteria do not survive long on them
○ Anaerobic culture requires special equipment

Question 9

why do anaerobic often cause abscesses

Answer 9

because there is low O2 tension in pus

Question 10

anaerobes cause

Answer 10

dental infections 
aspiration pneumonia
peritonitis 
pelvic inflammatory disease 
bite wounds 
diabetic foot ulcers 
necrotising fasciitis

Question 11

dental infections

Answer 11

periodontal disease
root canal infections
odontogenic infections

Question 12

aspiration pneumonia

Answer 12

risk for unconscious patients
aspiration of oropharyngeal contents, vomit
pleural empyema

Question 13

pleural empyema

Answer 13

pus in the pleural space

Question 14

peritonitis

Answer 14

usually due to bacteria leaking from the bowel

Question 15

PID

Answer 15

pelvic inflammatory disease
bacteria ascending from the vagina 
endomitritis 
salpingitis 
tubovarian abscess

Question 16

bite wounds

Answer 16

human or animal
polymicrobial
clenched fist injury - resulting from punching someone in the mouth

Question 17

diabetic foot ulcers

Answer 17

and those with peripheral vascular disease
§ Chronic non healing ulcers on the foot
§ Often infected with anaerobes and other bacteria

Question 18

diabetic foot ulcer infections may penetrate into

Answer 18

bones, establishing osteomyelitis

Question 19

necrotising fasciitis also called

Answer 19

myonecrosis or gas gangrene

Question 20

necrotising fascitis caused by

Answer 20

destructive condition may result from clostridium perfringens (exogenous) or polymicrobial infections in which commensal anaerobes are included (endogenous)