viral disease Flashcards
what does a viral disease or infection mean?
comes from a virus
how is the tobacco mosaic virus spread?
contact between plants
what does the tobacco mosaic virus infect?
chloroplasts
what is the effect of tobacco mosaic virus on photosynthesis?
reduces the ability to photosynthesise
what are viruses an example of?
pathogens
what are pathogens?
micro organisms that can cause infectious disease
can viruses be killed by antibiotics?
no
what is the first symptom of measles?
fever
after around 3 days, what happens?
red skin rash develops
how are measles viruses spread?
spread in droplets when an infected person coughs or sneezes, viruses is passed when droplets are breathed in
what is the first symptom of hiv?
flu-like sickness
what is the virus doing at the start of hiv infection?
attacking cells of patients immune system
over time, what happens if immune system is damaged?
immune system becomes so weak that it cant fight other infections that others could easily deal with
what do antiretroviral drugs do?
stops virus from multiplying, so immune system isn’t damaged
how is hiv transmitted?
exchange of human fluids
