Introduction to Viruses Flashcards
How are viruses classified? (3 ways)
- Host range
- Virion structure and morphology
- Structure and replication of virus genome nucleic acid
How are viruses cultured?
In cell lines, tissue or animals
What are three examples of respiratory viruses?
- Influezna A
- Rhinovirus
- Respiratory syncytial virus
What’s an example of a gastrointestinal virus?
Rotavirus
2 examples of a neurological virus
- Enterovirus
- Herpes simplex
2 examples of viruses that cause tumours
- Papillomavirus
- Retroviruses
What is meant by viruses being icosahedral?
They have 20 faces
What are the types of transmission that can come about through human-human contact?
- Blood borne
- Sexual
- Vertical (mother to child)
- Faecal oral
- Close contact
What are the other types of transmission?
- Droplet
- Airborne
- Vector
- Zoonotic
Describe co infection and how it results in resistant bacteria
- Virus A enters host at the same time as Virus B (that can successfully infect the host )
- Recombination between the species occurs
- New strain of virus A with the infectivity of Virus B
What are the 3 consequences of a viral infection?
- Clearance of the virus
- Chronic infection
- Latent infection
What two ways can the virus be cleared?
- Short term - no immunity
- Long term - development of immunity
What virus causes chronic infection?
HIV
What virus can cause latent infection?
Varicella
Name a virus that can lead to cancer
HPV leads to cervical cancer
