Poxvirus Flashcards

(47 cards)

0
Q

In EM they appear?

A

Brickshaped or ellipsoid

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1
Q

Largest virus

A

Pox

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2
Q

Replication takes place in

A

Cytoplasm

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3
Q

Released thru?

A

Lysis ( envelope acquired in the cytoplasm)

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4
Q

Etiologic agent of small pox

A

Variola

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5
Q

Dna is rich in whay bases?

A

AT

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6
Q

Used for smallpox vaccines

A

Vaccinia

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7
Q

Describe virion of pox

A

Core and lateral bodies;
Ridges;
Oval/brickshaped

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8
Q

Has low GC content except for

A

ParaPoxvirus

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9
Q

This step requires newly synthesiZed virus

A

Uncoating

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10
Q

Primary hosts are humans

A

Variol
Vaccinia
Molluscum

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11
Q

Difference of variola and vaccinia

A

Variola has NARROW host range

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12
Q

Similarities of variola and vaccinia

A

Bth grow on culture (egg, animal)

Similar nucleotide

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13
Q

______ infection does not occur in variola

A

Asymptatic

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14
Q

Transmision of variola

A

Resp droplet

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15
Q

Types of variola major

A
OMFH
Ordinary
Modified
Flat
Hemorrhagic
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16
Q

What do you call the intracytoplasmic inclusion body of variola?

A

Guarneri bodies

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17
Q

Primary viremia occurs in variola where?

A

Lymph nodes ( spleen, BM, liver…)

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18
Q

Secondary viremia

A

Skin and mucus membrane

19
Q

Clinical disease of variola

A

Pre eruptive phase;
Early (6-9thday);
Late

20
Q

Epithelial cells of malphigian layer became swollen and underwent

A

Balooning defeneration

21
Q

Variola has Similar histopath occurs with vaccinia the difference is…

A

Localized pustular lesions only

22
Q

Orthopox cannot be diffd in EM w one another, in what genera can it be diffd

A

Tana and parapox

23
Q

How to diffd orthopox groups?

A

Embryo chick: vaccinia are large w necrosis; variola are smaller

24
Poxvirus that cannot be cultured?
Molluscum
25
Immune system used by hosts w variola
Cell mediated immunity rather than antibody
26
Effective as prophylaxis for smallpox
Methiazone
27
Order of primary response in vaccinia
``` Papule Vesiculation Pustule Crust Pochmark ```
28
Termed as partial response only; lesions are seen rapidly and less severe
Vaccinoid response
29
Most serious compliacation of vaccinia
CNS disease
30
Most common complication of vaccinia
Inadvertent autoinoculation
31
Vaccinia Contraindicated in?
Pregnant ( fetal vaccinia)
32
Failure of initial lesion to heal and appearance of sec lesion elsewhere
Progressive vaccinia
33
Only diff of monkeypox to orthopox
Cervical and inguinal lymphadenopathy
34
Cowpox Diffd from vaccinia by these lesions on chick embryo
Deep red hemorrhagic lesions
35
Natural reservoir of cowpox
Rodents
36
Autoinoculation to the eyes
Cowpox
37
Painful lesions ( macules, papules, papillomatous)
Parapox orf
38
Milkers nodule virus
Pseudocowpox
39
Painless but itchy ( papules then nodules)
Pseudocowpox
40
2 stages of tanapox disease
Pre eruptive | Eruptive
41
Define pre eruptive of tanapox
Fever, headache, itching
42
Transmission of tanappx?
Vector
43
Transmission of molluscum
Fomites
44
Umbilicated lesions with satellite nodules in molluscum
Asymptomatic lesion
45
Discrete dome shaped waxy papules that changes color from white to pink to yellow in nolluscum
Charracteristic lesion
46
Found from rhesus monkeys
Yaba monkey pox