Bacillus Flashcards
Bacillus is a spore forming Bb T/F
T
The habitat of spores are diseased animals T/F
F habitat of vegetative Bb
describe morphology of bacillus
4-5 micrometer rod with a central spore
Bacillus is a flagellated Bb T/F
F
falgella is the essentail virulaence factor in bacillus T/F
F the capsule is
Resistance of Bacillus is weak T/F
F it’s fair can survive in a carcass for several days
56°c for several minutes
the spore can survive for up to 50 y !
in boiling it can survive up to 10 minutes
Capsule production is dependent on what
CO2
R-S Colonies are dependent on what
CO2
You should quickly open the carcass after the animal has deceased T/F
F do not open the carcass
depending on the temperature you need to wait up to 3 days
What temp. is needed for spore formation
15°c
B. anthracis is a haemolytic Bb T/F
F only B.cereus is capable of haemolysis
Oxidase?
Catalase?
O -
C +
What is the ascoli test good for
detection of B anthracis
Which cross reactions are important
B cereus - B anthracis
How is the ascoli test performed
normal saline + 2 organ samples + acetic acid
-boil - filter - 1-2 drops of Ag - check for precipitation ring
Name all the B. species
- B.subtillis
- B. megaterium
- B. cereus
- B. licheniformis
- B. thuringiensis
- Paenibacillus (B.) polymyxa
- Geobacillus (B.) stearothermophilus
- Paenibacillus larvae
Describe the disease caused by B.anthracis
-Ro,Ov - acute/peracute septicaemic anthrax
Pigs get very lethal Anthrax T/F
F high mortality is not common
Birds are very susceptible to Anthrax T/F
F Birds are completely resistant
B.anthracis is a obligate aerobic Bb T/F
F facultative aerobic
What is needed for spore formation
O2
What symptoms do humans show with B.anthracis
skin, pulmonary and intestinal form of anthrax
How do carnivores handle anthrax
they are comparatively resistant
B. subtillis, B.cereus and B. megaterium are flagellated Bb T/F
T
What kind of Bb is B.anthracis in regards to pathogenicity
obligate pathogen
What can B.cereus cause
human Gi infect, sporadic abortions of cattle
What can Paenibacillus larvae cause
american foulbrood of honey bees
How can you differentiate B. anthracis from B. cereus
B.cereus is capapble of haemolysis and has flagella
How can you differentiate B.anthracis from B.megaterium
B.megaterium can produce capsules
