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3RD YR 2ND SEM
bactelec
pt2
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Cards (82)
What
type of bacteria is Actinomyces?
Non-motile
,
non-spore
forming
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What type of environment does Actinomyces prefer?
Capnophilic
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What is the Gram stain result for Actinomyces?
Gram-positive
bacteria
, branching rods
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What type of media is required for Actinomyces to grow?
Enriched media like
serum
or
blood
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What structure do most Actinomyces species produce?
A true
mycelium
that fragments
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How many species of Actinomyces commonly cause disease in domesticated animals?
Four
species
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Name one species of Actinomyces that causes disease.
bovis
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Where is Actinomyces normally found in animals?
Oral
,
gastrointestinal
,
urogenital
tracts
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How is Actinomyces affected by heat and disinfectants?
Readily
killed
by
heat
and
disinfectants
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What was Arcanobacterium pyogenes formerly called?
Actinomyces
pyogenes
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What type of lesions does Arcanobacterium pyogenes commonly cause?
Suppurative
lesions
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What condition is associated with Arcanobacterium pyogenes in cattle?
Summer mastitis
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What
does the term "
pyogenic
" refer to in Arcanobacterium
pyogenes
?
Pus-producing
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How does Arcanobacterium pyogenes appear on blood agar plates?
Hemolytic
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What disease does Actinomyces bovis cause?
Lumpy jaw
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What is the primary site of infection for Actinomyces bovis?
Mandible
and
maxilla
of cattle
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How does Actinomyces bovis typically invade tissues?
Following
trauma
to the mucosa
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What are "sulphur granules" associated with in Actinomyces bovis infections?
Characteristic club colonies in
exudate
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What is the treatment of choice for small lesions caused by Actinomyces bovis?
Surgery
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What media is good for isolating Actinomyces bovis?
Loeffler’s blood serum slants
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Which antibiotics is Actinomyces bovis sensitive to?
Penicillin
and
streptomycin
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What is one treatment option for Actinomyces bovis infections?
Iodine compound
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What condition does Actinobaculum suis cause?
Porcine cystitis and pyelonephritis
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How is Actinobaculum suis transmitted?
At
coitus
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What disease does Actinomyces viscosus cause in hamsters?
Periodontal disease
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How does Actinomyces viscosus affect dogs?
Causes
abscessation
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How is Actinomyces viscosus diagnosed?
Lack of
club formation
in lesions
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What distinguishes Actinomyces viscosus from Nocardia species?
Failure to grow on
SDA
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What shape are Mycobacterium bacteria?
Rod-shaped
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What is a key feature of Mycobacterium's cell wall?
Rich in lipids and
mycolic acid
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What staining method is used for Mycobacterium?
Ziehl-Neelsen staining
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How long can Mycobacterium survive in the environment?
For
months
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What type of media do pathogenic Mycobacterium species require?
Complex egg-enriched
media
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How do pathogenic Mycobacterium species grow?
Slowly,
colonies
not visible for 3
weeks
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What is a characteristic of Mycobacterium's resistance?
Resistant
to adverse environmental influences
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What is Mycobacterium's susceptibility to heat treatment?
Susceptible
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Name one closely-related member of Mycobacterium that causes tuberculosis in humans.
tuberculosis
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What disease does Mycobacterium bovis cause in cattle?
Tuberculosis
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Which animals are relatively resistant to Mycobacterium bovis?
Dogs
,
sheep
, and goats
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How is Mycobacterium bovis primarily transmitted?
Aerosol
/inhalation of infected droplets
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