Actinomycetes

Question 1

what is the gram reaction

Answer 1

positive

Question 2

what organism has a beaded gram V appearance

Answer 2

nocardia

Question 3

aerobic

Answer 3

nocardia
streptomyces
nocardiopsis
actionmadura

Question 4

aerotolerant

Answer 4

actinomyces

proprionibacterium propionicum

Question 5

branched hyphae
nitrate +
weakly acid fast
orange glabrous colonies

Answer 5

nocardia

Question 6

nocardia
casein -
tyrosine -
xanthine -

Answer 6

asteroides

Question 7

nocardia
casein +
tyrosine +
xanthine -

Answer 7

brasiliensis

Question 8

what illness does nocardia cause

Answer 8

pneumonia

Question 9

where is nocardia found

Answer 9

soil

Question 10

what nocardia species cause disease

Answer 10

brasiliensis
asteroides (most common)
otitidiscavarium

Question 11

what is the route of infection for asteroides>

Answer 11

inhalation of bacilli

Question 12

what is the route of infection for brasiliensis

Answer 12

traumatic inoculation of skin

Question 13

nocardia pathogenesis

Answer 13

resist oxidative killing (prod superoxide dismutase and catalase)
inhibit phagosome-lysosome fusion
nocobactin

Question 14

branching 
filamentous
aerial mycelium
chains of spores
aerobes
earthy odor

Answer 14

streptomyces

Question 15

not partial acid fast
nitrate -
7-10 days for aerial hyphae

Answer 15

streptomyces

Question 16

used to make antibiotics

Answer 16

streptomyces

Question 17

what causes actinomycotic mycetoma

Answer 17

s. somaliensis

Question 18

what color are the granules in actinomycotic mycetoma

Answer 18

yellow brown

Question 19

streptomyces pathogenesis

Answer 19

minor traumatic injury to tissue

Question 20

nocardiopsis pathogenic spp

Answer 20

dassonvillei

synnemataformans

Question 21

disease caused by nocardiopsis

Answer 21

pulmonary and cutaneous mycetoma

Question 22

characteristics of nocardiopsis

Answer 22

aerobic
non acid fast
branched
catalase +
wrinkled colonies

Question 23

3 spp of actinomadura

Answer 23

madurae
pelletieri
dassonvillei

Question 24

how is an actinomadura infection characterized?

Answer 24

granulocytic infiltrates in craterlike openings in skin

Question 25

what color are a. madurae granules

Answer 25

large and yellow

Question 26

what color are a pelletieri granules

Answer 26

small and red

Question 27

what is the only organism that is acid fast

Answer 27

nocardia

Question 28

what organisms are positive for spontaneous fragmentation of hyphae

Answer 28

nocardiopsis

nocardia

Question 29

what is the only organism that can grow in the presence of lysozyme

Answer 29

nocardia

Question 30

what actinomyces spp is a strict anaerobe

Answer 30

meyeri

Question 31

molar tooth appearance on older colonies

Answer 31

actinomyces

Question 32

what is the most common organism to cause actinomycosis

Answer 32

israelii

Question 33

where are actinomyces organisms found

Answer 33

pus drainage

firm yellow sulfur granules

Question 34

diphtheriod appearance

branching rods

Answer 34

proprionibacterium

Question 35

how long does it take for proprioninbacterium to grow on columbia agar

Answer 35

18 - 24 hours

small smooth colonies

Question 36

what do proprionibacterium colonies look like after 7 - 14 days

Answer 36

resemble a. israelii (molar structure)

Question 37

how long does it take for A. israelii to grow?

Answer 37

7 - 10 days

immediate molar tooth