Microbiology L1 Flashcards
1
Q
what ocular infections result from the following?
- adenovirus
- herpes simplex
- chicken pox virus
- shingles virus
- Epstein barr virus
- mumps virus
- measles virus
A
- Conjunctivitis
- photophobia, cell loss
- Vesicles on the eye surface
- inflammation and glaucoma
- lacrimal inflammation
- lacrimal inflammation
- conjunctivitis, photophobia
2
Q
describe the structure of virus?
A
inner core= DNA/RNA , surrounded by a protein shell (capsid) and then a glycoprotein envelope on the outside.
3
Q
what is the range of size of a virus?
A
20-300nm
4
Q
describe the structure of HIV virus
A
has external glycoprotein envelope and receptor proteins are clearly visible on the surface
5
Q
what are the major characteristics of viruses
A
- DNA/ RNA but NO nucleus
- No energy generating system
- unknown if it is a living entity or not
6
Q
how does a virus invade a cell?
A
randomly attaches to the cell surface and then to specific receptors on the cell surface.
7
Q
how does a virus enter a cell?
A
virus particle is taken into a cell and enclosed in a membrane bound vesicle (phagocytosis)
