viral diseases Flashcards
how is measels virus spread?
by droplet infection. it causes fever and rash and can be fatal. there is no cure.isolation of patients and vaccination prevents spread.
what can HIV cause?
unless it is successfully controlled with antiretroviral drugs the virus attacks the body’s immune cells.
when does late stage HIV infection occur?
late stage HIV infection, or AIDS, occurs when the bodys immune system becomes so badly damaged it can no longer deal with other infections or cancers.
How is HIV spread?
by sexual contact or by the exchange of body fluids, such as blood, which occurs when drug users share needles.
how is tobacco mosaic virus spread?
by contact and vectors
what does tobacco mosaic virus do?
it damages leaves and reduces photosynthesis.
how is tobacco mosaic virus treated?
there is no treatment. the spread can be prevented by field hygiene and pest control.
