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Clinical Pathology > Microbiology 10 (Mycobacteria) > Flashcards

Microbiology 10 (Mycobacteria) Flashcards

1
Q

Broad bacilli with cross-banding

A

M. marinum

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2
Q

Bacilli with shepherds crook

A

M. kansasii

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3
Q

Presumptive MTB

A

Acid fast with cording or

NAP sensitive

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4
Q

Rapid growers (<7 days)

A

M. fortuitum (arylsulf +, nitrate +)
M. chelonae (arylsulf +, nitrate -)
M. smegmatis
M. abscessus

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5
Q

Photochromogens

A

M. kansasii
M. simiae
M. marinum
M. asiaticum

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6
Q

Scotochromogens

A

M. scrofulaceum
M. gordonae
M. flavescens

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7
Q

M szulgai

A

scotochromogen at 37

photochromogen at 22

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8
Q

diff MTB from MAI or M. bovis by naicin

A

MTB niacin +

MAI, M. bovis niacin -

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9
Q

MTB characteristics

A 
NAP+, 
cording +
niacin +
ruff buff colonies
catalase -
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10
Q

M. scrofulaceum

A

cervical lymphadenopathy in children

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11
Q

M. kansaii

A

pulmonary dz with underlying pneumoconiosis

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12
Q

Buruli ulcer

A

M. ulcerans

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13
Q

Lepromatous leprosy

A

skin
lots of AFB in foamy histiocytes
Strongyloides superinfection

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14
Q

Tuberculoid leprosy

A

noncaseating granulomas

very few AFB

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15
Q

katG

inhA

A

Genes for isoniazid resistance

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16
Q

rpoB

A

Gene for rifampin resistance

17
Q

pncA

A

Gene for pyrazinamide resistance

18
Q

rpsL, S12 ribosomal protein

rrs 16S ribosomal RNA

A

Genes for streptomycin resistance

19
Q

Runyoun classification

A

I: photochromogen
II: scotochromogen
III: non-chromogen
IV: rapid growers

20
Q

Examples of Runyoun I

A

Kansasii
Marinum
Asiaticum
Simiae

21
Q

Examples of Runyoun II

A

Scrofulaceum
Gordonae
Flavescens

22
Q

Examples of Runyoun III

A

Avium-Intracellulare
Xenopi
Terrae

23
Q

Examples of Runyoun IV

A

Fortuitum
Abscessus
Chelonae
Peregrinum

24
Q

Assd with strongyloides infection

A

Lepromatous leprosy

Clinical Pathology (59 decks)

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