Actinomycetes Flashcards
what is the gram reaction
positive
what organism has a beaded gram V appearance
nocardia
aerobic
nocardia
streptomyces
nocardiopsis
actionmadura
aerotolerant
actinomyces
proprionibacterium propionicum
branched hyphae
nitrate +
weakly acid fast
orange glabrous colonies
nocardia
nocardia
casein -
tyrosine -
xanthine -
asteroides
nocardia
casein +
tyrosine +
xanthine -
brasiliensis
what illness does nocardia cause
pneumonia
where is nocardia found
soil
what nocardia species cause disease
brasiliensis
asteroides (most common)
otitidiscavarium
what is the route of infection for asteroides>
inhalation of bacilli
what is the route of infection for brasiliensis
traumatic inoculation of skin
nocardia pathogenesis
resist oxidative killing (prod superoxide dismutase and catalase)
inhibit phagosome-lysosome fusion
nocobactin
branching filamentous aerial mycelium chains of spores aerobes earthy odor
streptomyces
not partial acid fast
nitrate -
7-10 days for aerial hyphae
streptomyces
used to make antibiotics
streptomyces
what causes actinomycotic mycetoma
s. somaliensis
what color are the granules in actinomycotic mycetoma
yellow brown
streptomyces pathogenesis
minor traumatic injury to tissue
nocardiopsis pathogenic spp
dassonvillei
synnemataformans
disease caused by nocardiopsis
pulmonary and cutaneous mycetoma
characteristics of nocardiopsis
aerobic non acid fast branched catalase + wrinkled colonies
3 spp of actinomadura
madurae
pelletieri
dassonvillei
how is an actinomadura infection characterized?
granulocytic infiltrates in craterlike openings in skin
what color are a. madurae granules
large and yellow
what color are a pelletieri granules
small and red
what is the only organism that is acid fast
nocardia
what organisms are positive for spontaneous fragmentation of hyphae
nocardiopsis
nocardia
what is the only organism that can grow in the presence of lysozyme
nocardia
what actinomyces spp is a strict anaerobe
meyeri
molar tooth appearance on older colonies
actinomyces
what is the most common organism to cause actinomycosis
israelii
where are actinomyces organisms found
pus drainage
firm yellow sulfur granules
diphtheriod appearance
branching rods
proprionibacterium
how long does it take for proprioninbacterium to grow on columbia agar
18 - 24 hours
small smooth colonies
what do proprionibacterium colonies look like after 7 - 14 days
resemble a. israelii (molar structure)
how long does it take for A. israelii to grow?
7 - 10 days
immediate molar tooth
