4-1 Orthomyxo Flashcards

(44 cards)

0
Q

Subtypes are dt antigenic variations of surface glycoproteins

A

HA

NA

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1
Q

Antigenically stable

A

Type C

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2
Q

LRTI caused by?

A

Abc
Rsv
Parainfluenza

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3
Q

Proteins of ortho

A

9 sp

1nsp

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4
Q

CAuses highly infectious viral illness

A

Orthomyxo

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5
Q

Found in mosquitoes, ticks, and banded mongoose

A

Thogotovirus

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6
Q

7 segments?

A

C

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7
Q

Enveloped?

A

Yes

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8
Q

For Release of virus

A

Neuraminidase

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9
Q

For Core receptor

A

Nucleoprotein

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10
Q

Protein For attachment

A

Hemaglutinin

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11
Q

For regulation of mrna splicing

A

Ns1 ns2

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12
Q

Antiviral drugs target what?

A

M2 protein

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13
Q

Target of neutralizing antibodies

A

Hemagglutinin

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14
Q

Ha causes antigenic changes of what?

A

Minor drift

Major shift

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15
Q

Describe the receptor for HA

A

Trisaccharide of sialic, gal, glu

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16
Q

Neuraminidase is important in determination of what?

A

Subtypes!

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17
Q

THGSY is?

A

Standard nomenclature

18
Q

Human and animal strains

19
Q

Human and swine

20
Q

Ha has ? Subtypes?

21
Q

Hiw many subtypes of ha and na recovered in humans

22
Q

H5n1?

A

Chickens to humans

23
Q

Shift or drift?
New subtype
Minor
Pandemic

A

Shift
Drift
Shift

24
Transmission
Inhalation
25
Survives what?
``` Slow drying Dust 4c Seawater -70c ```
26
Systemic sx?
Dt interferon and lymphokines
27
Local sx?
Cilia and mucus secreting cells
28
Important for future protection against infection
Antibody
29
Important cause of croup in children Under 1yo
A
30
Gastric flu. Type?
B
31
Afebrile urti. Type?
C
32
Croup is associated with what sx?
Otitis media
33
Lung complications?
PRimary inf pneumonia Bacterial pneumonia Cardiac involvment Neuro (GBS, reyes, enceph)
34
Sequelae that Affects 2-6yo?
Reyes
35
Reyes manifestations
``` hHiME Hepato Hypogly Mental stat Inclease bloood ammonia Enceph ```
36
Immunity important?
IgA IgG | Celular immunity
37
Antibodies to this is the only way to be protective
Ha and na, others are not
38
T or f? No cross protection to the types?
T
39
Samples best Obtained at what time?
3 days after onset
40
Detects hemadsorbing virus
Hemadsorption
41
Detects virus antigens
Hsf elisa
42
M2 ion channel inhibitors
Rimantidine
43
Ineffective against b and c
A..amantadine