none-spore-forming anaerobes

Question 1

characteristics of none-spore-forming anaerobes

Answer 1

• gram-negative
• obligate anaerobes
• involved in suppurative, necrotic conditions (feed on dead tissues)
• often polymicrobial
• can be easily killed by O2
• stinky smell
• part of normal microbiota

Question 2

Fusobacterium necrophorum

Answer 2

• filamentous rods
  virulence factor: leukotoxin
• cattle; calf Diptheria, liver abscesses via rough feed abrasions
• sheep; foot abscesses
  control: resident of GIT, damages tissues so Trueperella and Dichelobacter can invade deeper

Question 3

Dichelobacter nodosus

Answer 3

dumble shaped
virulence factor: type 4 fimbriae, serine protease
host: sheep, goat, cattle, pig
dz: contagious footrot
causes: lameness, reparation of the hoof from skin
control: resident of ruminant foot

Question 4

Prevotella melaninogenica

Answer 4

host cattle
dz: interdigital necrobacillosis
resident of mouth

Question 5

Bacteroides fragillis

Answer 5

host: humans
dz: most common cause of anaerobic infections
- less common in animals
treatment: resistant to penicillin, colistin

Question 6

Capnocytophaga caminorsus

Answer 6

• rods
  host: cats, dogs, humans
  dz: bite wound infections
• most common in old and splenectomized humans
  control: resident of mouth
  treatment: penicillin, rifampin, clindamycin
  resistant to sulfonamides, aminoglycosides

Question 7

streptobacillus moniliformis

Answer 7

host: rodents, humans
dz: rat-bite fever
- fever, cills, headache, v+/D+ within 1 week +/- rash
- bacteremia, endocarditis
resident in mouth of mice, rats, guinea pigs