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23 Cards in this Set
- Front
- Back
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Polyhedral (Viral Shape) |
High Symmetry Icosahedron 20 faces, 12 corners Examples: Rhinovirus, Epstein-Barr virus (Mononucleosis), and herpes |
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Virus Composition |
Nucleic Acid - Dna or Rna Capsid- Protein Coating surrounding nucleic acid Envelope-lipids proteins, carbohydrates May have spikes- carbs and proteins Envelope may increase binding ability to host |
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Central Dogma |
Sdescribes flow of genetic information within a cell, followed by prokaryotes and eukaryotes. |
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Viral Shape (Helical) |
Shape refers to nucleocapsid doesn't matter if enveloped or not Rod Shaped stacking together=Helical Examples. Ebola,flue,rabies |
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Viral Shape ( Complex) |
Head and tail components or other complexities Common bacteriophage has polyhedral head, tail sheath and tail fibers examples: smallpox virus, orthopoxvirus |
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Viral Species |
A group of viruses sharing the same genetic information and ecological niche (host) |
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Lytic Cycle (Bacteriophage replication) |
ends with lysis and death of host cell |
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Lysogenic cycle |
host cell remains alive |
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Varicella zoster Virus (HHV-3) |
Herpes virus family Mild Childhood disease 3rd most common infectious disease after gonorrhea & chlamydia until 1995 vaccine Enteres respiratory localizes in skin after 2 weeks skin forms vesicles which fill with pus,rupture |
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Epstein-Barr virus (HHV-4) |
Infectious mononucleosis Characterized by proliferation of monocytes Childhood infections are asymptomatic S&S- fever, sore throat, swollen lymph nodes in the neck general weakness |
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Cytomegalovirus (HHV-5) |
Cytomegalovirus Infections Infected cells swell Latent in white blood cells May be asymptomatic or mild ( s&s similar to mono)
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Small Pox virus ( Dna Enveloped) |
Variola major - Mortality rate of 20% or higher Variola minor - mortality rate of less than 1% S&S - fever, aches, headache, vomiting, raised skin lesions |
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Mumps virus (Rna,Enveloped) |
Infection of salivary glands Respiratory droplet transmission Virus multiplies in respiratory tract and neck lymph nodes Ends up in blood stream then reach salivary glands glands swell 16-18 after virus exposure |
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Parainfluenza virus (Rna, enveloped) |
Bronchitis Inflammation of the bronchi of the lungs s&S - loud, harsh, barking cough labored breathing fever croup in toddlers
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Respiratory syncytial virus (Rs) Rna virus, enveloped |
Bronchitis, Common viral respiratory disease in infants. |
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Rubella virus ( German Measles) Rna virus, enveloped |
More mild than rubeola may go undetected, spots not |
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Rubeola Virus (Measles) Rna virus enveloped |
Extremely contagious, respiratory spread virus 10- 12 day incubation, fever common cold symptoms, small raised spots Kopliks spots in mouth= tiny red w/ white centers Very dangerous in young and old pneumonia and secondary infections |
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Coronavirus Rna Virus, enveloped (Rhinitis) |
Nasal inflammation, |
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Influenza Virus Rna virs, enveloped |
Hemagglutin(H) spikes to recognize and attach to body cells Neuraminidase (N) spikes help virus escape from cell after intracellular reproduction 8 types of rna |
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Rabies Virus Rna Virus, enveloped |
Virus multiplies in skeletal muscles and then travels along pns to cns causing encephalitis
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Rabies virus ( Furious Rabies) |
l |
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Norovirus Rna, Non envelope |
90% viral gastroenteritis from rota-& norovirus Enviromentally hardy Spread throughout daycares, cruise ships, etc.
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Rotavirus Rna virus non enveloped |
Most common cause of gastroenteritis 3 million cases but fewer than 100 deaths per year in us |
