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EXAM VIROLOGY > 24. Coronaviridae > Flashcards

24. Coronaviridae Flashcards

1
Q

MEMBERS OF THE FAMILY CORONAVIRIDAE (2 subfamilies)

A
  1. Subfamily Coronavirinae, contains a substantial number of pathogens of mammals and birds (swine, cattle, horses, camels, cats, dogs, rodents, birds, bats, rabbits, ferrets, mink, and various wildlife species) that individually cause a remarkable variety of diseases:, pneumonia, reproductive disease, enteritis, polyserositis, sialodacryoadenitis, hepatitis, encephalomyelitis, nephritis, and other although infections are subclinical. In humans, from the common cold to more severe respiratory disease— severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS), which are both zoonoses.
  2. Subfamily, Torovirinae, contains pathogens of both terrestrial and aquatic animals
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2
Q

MEMBERS OF THE SUBFAMILY CORONAVIRINAE (FAM. CORONAVIRIDAE) (4 genera)

A
  1. Genus Alphacoronavirus
  2. Genus Betacoronavirus
    1. group A
    2. group B
    3. group C
  3. Genus Gammacoronavirus
  4. Genus Deltacoronavirus
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3
Q

Which 2 viruses have the following properties:

Virions are pleomorphic or spherical (Subfamily 1) or disc-, kidney-, or rod-shaped (Subfamily 2); 80- 220 nm (1) or 120-140 nm (2) in diameter.

Virions are enveloped, with large club-shaped spikes (peplomers)

Virions have an icosahedral core structure within which is a helical nucleocapsid (1) or a tightly coiled tubular nucleocapsid in a doughnut (2) or bacilliform (bafiniviruses) shape

The genome consists of a single molecule of linear +ssRNA, 25-31 kb in size; the genome is 5’ capped, 3’ polyadenylated, and infectious

Coronavirus virions contain three or four structural proteins: a major spike glycoprotein (S), transmembrane glycoproteins (M and E), a nucleoprotein (N), and, in some viruses, a hemagglutinin esterase (HE). virions of 2 contain no E protein.

Viruses replicate in the cytoplasm; Virions are formed by budding into the endoplasmic reticulum and are released by exocytosis. Cell-cell fusion may occur

A
  1. X = Coronaviruses
  2. Y = Toroviruses
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4
Q

MEMBERS OF THE GENUS ALPHACORONAVIRUS (FAM. CORONAVIRIDAE, SUBFAM. CORONAVIRINAE) (5 species)

A
  1. Feline coronavirus (Feline enteric coronavirus; Feline infectious peritonitis virus)
  2. Canine coronavirus
  3. Transmissible gastroenteritis (TGE) virus of swine
  4. Porcine respiratory coronavirus
  5. Porcine epidemic diarrhea virus (PEDv)
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6
Q

MEMBERS OF THE GENUS BETACORONAVIRUS (FAM. CORONAVIRIDAE, SUBFAM. CORONAVIRINAE) (3 + 1 + 1 species)

A
  1. Group A:
    1. Porcine hemagglutinating encephalomyelitis virus
    2. Mouse hepatitis virus / Rat sialodacryoadenitis virus
    3. Bovine coronavirus / Equine coronavirus / Canine respiratory coronavirus
  2. Group B:
    1. Severe acute respiratory syndrome (SARS) coronavirus
  3. Group C:
    1. Middle East respiratory syndrome (MERS) coronavirus
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7
Q

MEMBERS OF THE GENUS GAMMACORONAVIRUS (FAM. CORONAVIRIDAE, SUBFAM. CORONAVIRINAE) (3 species)

A
  1. Avian infectious bronchitis virus
  2. Turkey coronavirus / Bluecomb virus
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8
Q

MEMBERS OF THE GENUS DELTACORONAVIRUS (FAM. CORONAVIRIDAE, SUBFAM. CORONAVIRINAE) (1 species)

A
  1. Porcine deltacoronavirus
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11
Q

MEMBERS OF THE GENUS BAFINIVIRUS (FAM. CORONAVIRIDAE, SUBFAM. TOROVIRINAE) (2 species)

A
  1. White bream virus
  2. Fathead minnow / Necrotic nidovirus
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15
Q

MEMBERS OF THE SUBFAMILY TOROVIRINAE (FAM. CORONAVIRIDAE) (2 genera)

A
  1. Genus Torovirus
  2. Genus Bafinivirus
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16
Q

MEMBERS OF THE GENUS TOROVIRUS (FAM. CORONAVIRIDAE, SUBFAM. TOROVIRINAE) (1 species)

A
  1. Breda virus (cattle)
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17
Q

CORONAVIRUSES OF BIRDS

A
  • INFECTIOUS BRONCHITIS VIRUS
  • TURKEY CORONAVIRUS
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18
Q

CORONAVIRUSES OF CATS, DOGS AND FERRETS

A
  • feline enteric coronavirus,
  • feline infectious peritonitis virus,
  • canine coronavirus,
  • canine respiratory coronavirus,
  • ferret coronavirus
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19
Q

CORONAVIRUSES OF CATTLE AND HORSES

A
  • bovine coronavirus,
  • equine coronavirus
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20
Q

CORONAVIRUSES OF LABORATORY ANIMALS

A
  • mouse hepatitis virus,
  • rat coronavirus (rat sialodacroadenitis coronavirus),
  • guinea pig and
  • rabbit coronaviruses
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21
Q

CORONAVIRUSES OF PIGS

A
  • transmissible gastroenteritis,
  • porcine epidemic diarrhea,
  • porcine respiratory coronavirus,
  • porcine hemagglutinating encephalomyelitis virus,
  • porcine deltacoronavirus
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22
Q

ZOONOTIC CORONAVIRUSES

A
  • SARS and
  • MERS coronaviruses.

EXAM VIROLOGY (26 decks)

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