disease transmission Flashcards
(16 cards)
description of physical contact
-touching infected person or contaminated surfaces
examples of pathogens transmitted by physical contact
-HIV
-Bacterial meningitis
-ringworm
-athletes foot
how to minimise spread of physical contact
-hygiene
-keep surfaces clean
-sterilising surgical instruments
-condoms
description of faecal-oral description
-eating food/drinking water contaminated by the pathogen
examples of pathogens transmitted by faecal-oral transmission
-cholera
-food poisoning
how to minimise spread of faecal-oral transmission
-treatment of waste water and drinking water
-thorough washing of fresh food and careful preparation of food
what is droplet transmission
-when pathogen is carried in tiny droplets in the air
what is an example of a droplet transmission pathogen
-tuberculosis
-influenza
how to minimise spread of droplet transmission
-catch it bin it kill it
-cover mouth when coughing and sneezing
-use tissue and dispose correctly
description of how spores are spread
-spores carried in the air/reside on the surfaces of soil
examples of pathogens transmitted by spores
-anthrax
-tetanus
how to minimise spread of spores
-using a mask
-washing the skin after contact with soil
whats a plasmodium
-genus of unicellular eukaryotes that are obligate parasites (require hosts for survival)
life cycle of a plasmodium
-involve development in blood feeding insect
-then injects parasites into vertebrate host during blood meal
how is malaria transmitted
-an uninfected person is bitten
-plasmodium migrates to liver
-plasmodium migrates to blood
-a person has malaria
-gametes of the plasmodium develop in the blood
-female mosquito sucks blood and fertilisation of gametes happen in stomach of mosquito
-plasmodium migrates to mosquito salivary glands
suggest reasons why the organism is successful in causing disease in the host
-plasmodium parasite has diff stages of infection
-e.g. liver to RBC
-exists as both haploid and diploid cells at different stages of the lifecycle
-hard for the bodys immune system to fight off
