viral diseases Flashcards
list the viral diseases
-measles
-HIV
-TMV
what does TMV stand for?
tobacco mosaic virus
symptoms of measles
red skin rash, signs of a fever
how is measles spread?
inhalation of droplets from sneezes and coughs
how is measles being prevented?
vaccinations for young children
what is measles?
a serious viral disease that can be fatal
what can measles lead to?
blindness, pneumonia, brain damage
HIV symptoms
flu-like symptoms
what drugs can control HIV and what do they do?
antiretroviral, stop the virus replicating in the body
what does HIV turn into and why is it dangerous?
AIDS, a state where the body’s immune system becomes so badly damaged it can’t deal with any other infections
what is HIV?
a virus that attacks the immune system until it can no longer function properly
how is HIV spread?
sexual contact, exchanging bodily fluid
when can exchanging fluid occur?
sharing needles when taking drugs/breastfeeding
how can the spread of HIV be prevented?
-use of condoms
-screening of blood for transfusions
-not sharing needles
what does TMV affect?
plants
symptoms of TMV
mosaic pattern on the leaves of plants, discolouration, stunted growth due to lack of photosynthesis
what species of plants does it affect?
many including tomatoes
how is TMV spread?
contact between diseased and healthy plants, insects acting vectors
how does TMV affect plants / why do they have a stunted growth?
- causes plants to produce less chlorophyll
- less light energy absorbed
- less photosynthesis
- less glucose made
- less amino acids for growth
- as glucose is needed for making amino acids
- also less energy released for growth
- as glucose needed for respiration
