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Flashcards in Orthomyxoveridae Deck (20)
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1

How many genera are found in the Orthomyxoviridae family of viruses?
A. 4
B. 7
C. 5
D. 6

C. 5

2

What are hemagglutinin and neuraminidase?
A. Proteins found in the nucleus of influenza virus
B. Secretory proteins produced by the orthomyxovirus
C. Lipoprotein ligands on orthomyxovirus target cells
D. Glycoproteins on orthomyxovirus that contribute to virus attachment

D. Glycoproteins on orthomyxovirus that contribute to virus attachment

3

Which of the following sentences best describes the type and configuration of the nucleic acid in orthomyxovirus?
A. 6-8 segments of linear, negative sense, single stranded RNA
B. 6-8 segments of circular, negative sense sense, dsDNA
C. 6-8 segments of circular, positive sense dsRNA
D. 6-8 segments of linear, positive sense, single stranded RNA

A. 6-8 segments of linear, negative sense, single stranded RNA

4

When influenza viruses re-assort their gene segments, it is said that they undergo an:
A. antigenetic drift
B. Antigenic rearrangement
C. Antigenic drift
D. Antigenic shift

D. Antigenic shift

5

Retrovirus, orthomyxovirus, and paramyxovirus have lipid envelope and so are sensitive to:
A. Acidic pH
B. Lipid solvents
C. Heat (e.g., 56C/30 min)
D. All of the above

D. All of the above

6

Uncoating of the orthomyxovirus envelope takes place in the:
A. None of the above
B. Both in nucleus and cytoplasm
C. Cytoplasm
D. Nucleus

C. Cytoplasm

7

Which of the following names of an influenze virus is correct according to the naming scheme of influenza viruses?
A. A/swine/Iowa/15/30
B. Swine/A/Iowa/15/’30 (H1N1)
C. A/Iowa/swine/15/30 (H1N1)
D. A/swine/Iowa/15/1930 (H1N1)

D. A/swine/Iowa/15/1930 (H1N1)

8

Which of the following statements best describes transmission of Influenza virus?
A. In aquatic birds fecal-oral transmission is common
B. In poultry- ingestion and inhalation
C. In mammals- aerosol, droplets, and fomites
D. A, B, and C

D. A, B, and C

9

What type of horses are at risk of contracting equine influenza?
A. Breeding stock horses
B. Race horses
C. Show horses
D. All of the above

D. All of the above

10

Equine influenza is primarily a disease of the:
A. Immune system
B. Reproductive tract
C. Respiratory tract
D. Digestive tract

C. Respiratory tract

11

Prolonged high fever in pregnant mares infected with equine influenza virus can lead to:
A. Emaciation
B. Abortion
C. No consequence
D. Severe dehydration

B. Abortion

12

What feasible therapeutic options are available for treatment of swine influenza in swine?
A. Antivirals
B. None exist
C. Steroid therapy
D. Antibiotics

B. None exist

13

Which of the following virus families has a herringbone shaped nucleocapsid?
A. Picornaviridae
B. Orthopoxviridae
C. Orthomyxoviridae
D. Paramyxoviridae

D. Paramyxoviridae

14

Which orthomyxovirus genus contains pathogens for humans, swine, horses, and chicken?
A. Thogotovirus
B. Influenza B
C. Influenza A
D. Influenza C

C. Influenza A

15

What diagnostic course would take to assess herd immunity to equine influenza?
A. ELISA, to measure residual virus antigens
B. Biological assay, to challenge animals and see if they will be infected with equine influenza virus
C. RT-PCR, to measure the residual viral RNA
D. Retrospective serology to measure the level of antibodies against equine influenza virus

D. Retrospective serology to measure the level of antibodies against equine influenza virus

16

What control approach is usually adopted by many countries to control influenza in chicken and swine?
A. Separation of infected animals from non-infected
B. Culling of birds or pigs in an outbreak of influenza
C. Treatment of sick birds or animals
D. Interventional vaccination of animals within the outbreak area

B. Culling of birds or pigs in an outbreak of influenza

17

Influenza, in whatever animal species the disease occurs, it is manifested as a disease of the
A. Reproductive tract
B. Immune system
C. Digestive tract
D. Respiratory tract

D. Respiratory tract

18

Infection of poultry caused by any influenza A virus of the H5 or H7 subtype or any AI virus that causes at least 75% mortality should be considered as:
A. Not an imminent threat
B. A pandemic
C. Non-notifiable avian influenza
D. Notifiable avian influenza

D. Notifiable avian influenza

19

What are the names of the 2 important envelope proteins in the orthomyxovirus?
A. NP and P proteins
B. Matrix and NP proteins
C. Hemagglutinin and neuraminidase
D. NEP and NS2

C. Hemagglutinin and neuraminidase

20

Antigenic shift and antigenic drifts are characteristic of:
A. Retrovirus
B. Nipah virus
C. Chikungunya virus
D. Influenza A virus

D. Influenza A virus