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Flashcards in Micro Deck (83)
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1

what mycobacteria are considered rapid growers?

M. fortuitum
M. chelonae
M. abcessus

2

What is a photochromogen?

Turns yellow on plate when grown in light

3

What mycobacteria are photochromogens?

M. kansasii
M. marinum
M. asiaticum

4

What is a scotochromogen?

Turns yellow on plate with growth in light or dark

5

What mycobacteria are scotochromogens?

M. gordonae
M. scrofulaceum
M. xenopi

6

which mycobacteria are considered non-chromogens?

MAC
M. ulcerans
M. haemophilum
MTB**although classification does not technically apply

7

What serogroups of vibrio cholera cause disease?

O1 and O139

8

What type of E. coli produces shiga-like toxin?

Enterohemorrhagic E. coli (EHEC)
*most common strain O157:H7

9

What bacteria is most common cause of Guillan-Barre?

Campylobacter jejuni

10

3 major caauses of pneumonia in COPD patients?

H. flu, moraxella catarrhalis, legionella pneumophilia

11

What are HACEK organisms

Causes of culture negative endocarditis
Haemophilus, Aggregetibacter, cardiobacterium, eikenella, Kingella

12

ideal protocol for blood cultures

3 sets, drawn at separate times (1-8 hrs apart), each paried with adequate volume (20-30cc)

13

Causes of bacterial meningitis in neonates

GBS, gram - bacilli, listeria

14

Causes of bacterial meningitis in kids

N. meningitidis, S. pneumo, H. flu type B

15

Causes of bacterial meningitis in adults

S. pneumo, N. meningitidis

16

Causes of meningitis in AIDS pts

S. pneumo, MTB, cryptococcus neoformans

17

Cause of rate bite fever (fever, rash, b/l ankle + shoulder pain)

streptobacillus moniliformis

18

what are the hemadsorption/hemagglutinin tests? What viruses can they detect?

hemagglutinins adsorb guinea pig RBCs
influenza and parainfluenza viruses

19

Name the 1 ssDNA non-enveloped viruses

Parvovirus

20

2 dsDNA non-enveloped viruses

adenovirus
papillomavirus
polyomavirus

21

3 dsDNA enveloped viruses

herpes virus
hepadnavirus (HBV)
poxvirus

22

ssRNA non-enveloped viruses

Picornaviridae (polio virus, enterovirus, HAV, rhinovirus)
calciviridae (norovirus)
Hepeviridae (HEV)

23

dsRNA non-enveloped virus

reoviridae (rotavirus)

24

ssRNA enveloped virus

-Flaviviridae (HCV, yellow fever, WNV, dengue)
-Togaviridae (rubella, EEE, WEE)
-Retroviridae (HIV, HTLV)
-Orthomyxoviridae (influenza)
-Paramyxoviridae (RSV, parainfluenza, mumps, measles)
-Rhabdoviridae (Rabies)
-Coronavridiae
-Arenaviridae
-Bunyaviridae (hantavirus, california encephalitis)
-Delta virus (HDV)

25

HBV is what type of virus?

enveloped dsDNA

26

HCV is what type of virus?

enveloped ssRNA

27

What subtypes of adenovirus are associated with hemorrhagic cystitis?

11 and 12

28

What subtypes of adenovirus are associated with childhood gastroenteritis?

40 and 41

29

What is antigenic drift and which virus shows this?

Antigenic drift=minor changes, due to point mutations in H&N genes
influenza A

30

What is antigenic shift and which virus shows this?

Antigenic shift=major changes, due to genetic reassortment between strains (causes worldwide pandemics)
Influenza A