Streptobacillus moniliformis

Question 1

pleomorphic?
filamentous?
gram
motility
respiration
shape
arrangement
fastidious? oxygen requirement?
oxidase
catalase

Answer 1

highly pleomorphic
filamentous
gram negative
non motile
facultative anaerobe
bacilli
long chains
fastidious microaerophilic (1-10% oxygen)
oxidase negative
catalase negative

Question 2

which form is pathogenic

Answer 2

ancillary form

Question 3

which form is non pathogenic

Answer 3

L form

Question 4

what is L form

Answer 4

lacks a cell wall

Question 5

where does it reside, what does it cause

Answer 5

upper respiratory tract of rodents
rat bite fever

Question 6

transmission

Answer 6

rat bite
ingestion of contaminated products (haverhill fever)

Question 7

do cats and dogs develop disease

Answer 7

cats and dogs asymptomatic
occasionally develop abscesses

Question 8

symptoms

Answer 8

fever
rash
joint and muscle pain
headache
vomiting
sore throat

Question 9

complications

Answer 9

abscesses
pneumonia
hepatitis
nephritis
meningitia
endocarditis

Question 10

growth media

Answer 10

brain heat infusion enriched with 15% blood, 20% horse/calf serum, or 5% ascitic fluid in 5-10% CO2

Question 11

blood agar

Answer 11

non hemolytic
small grey colonies

Question 12

what are L form colonies stained by and what do they look like

Answer 12

diene’s stain
fried egg appearance

Question 13

treatment

Answer 13

antibiotic therapy
surgical drainage of abscesses