DNA viruses Adenovirus to end of DNA viruses Flashcards
What do Adenoviruses primarily attack?
Primarily mucoepithelial cells of the conjunctiva, respiratory tract, gastrointestinal and genitourinary tracts
Describe Adenoviruses
Non-enveloped viruses
Genome is made of double stranded DNA
Capsid is icosahedral with 12 penton fibers that bind to receptor sites on host cell
What are the 4 types of Adenoviruses?
- Acute respiratory infection- common cold
- Pharyngitis-resembles strep throat
- Gastroenteritis
- Epidemic Keratoconjunctivitis
What are the 2 types of Papovaviridae?
- Human Papillomavirus
- Polymaviruses
Human papillomavirus causes what?
Warts!
Describe Human papilomavirus
Naked dsDNA virus
Isosahedron capsid symmetry
Replicate in squamous epithelium of skin and mucous membranes
What are the 4 types of Human papillomavirus warts?
1-Common warts
2-Plantar warts
3-Laryngeal papillomas
4-Genital warts
Describe plantar warts
Painful deep warts found often on the bottom of the foot
Describe Laryngeal papillomas
benign epithelial growths similar to warts on the skin
What all is there to know about Genital warts?
- One of most common STI of the world
- 30 types of HPV spread through sexual contact
- Many HPV infections have no symptoms
- Cause human neoplasms and associated with human penile, uterine, and cervical carcinomas
The second Papovaviridae is?
Polymaviruses
Describe polyomaviruses
Naked dsDNA with icosahedral symmetry
History and transmission are unknown
infections have not been associated with any clinical syndromes
The last of the DNA viruses is? (dogs???)
Parvovirus
Describe parvovirus
Smallest naked icosahedral DNA viruses
Due to this most resistant viruses known
Infects cats, dogs, mice, and humans
The only type of parvovirus we are looking at is Human parvovirus. Where is it found in humans and what are their symptoms?
Parvovirus B19 is found in respiratory secretions before the onset of the rash while they just have a cold
