Transmission of pathogens Flashcards
what is the difference between direct transmission and indirect transmission
Both are the transmission of pathogen between host to host, however indirect involves a vector passing the pathogen
What are the 4 means of transmission
Direct physical contact
spore transmission
faecal oral transmission
droplet infection
what are the factors affecting transmission by direct physical contact
Washing hands
disinfecting surfaces
condoms
sterilising surgical equipment
What factors affect transmission via spores
wearing masks
washing skin that came into contact with soil
what factors affect transmission of faecal- oral tranmission
treat waste water and drinking water
Cooking food fully until its not raw
what factors affect droplet infection
catch it bin it kill it
covering mouth when sneezing
what are the all round factors which affect all means of transmissions
overcrowding
poor health care
homeless
poor ventilation
Describe the journey of plasmodium from an infected person to an uninfected person
Infected guy has plasmodium gametes in blood
Female anopheles mosquito sucks that blood
Plasmodium migrates to the salivary gland of the mosquito
mosquito bites uninfected guy
plasmodium travels to liver then to the blood
When plant pathogens are indirectly transmitted between plants, what tissue of the plant is usually infected
Vascular tissue
Describe an insect attack (indirect)
Insect attacks infected plant, then attacks uninfected plant- pathogen is transmitted
What disease is caused by a beetle in plants
Dutch elm disease
State the two areas of plant habitats which may contain pathogens
Can be present in soil
can be present in the air - airborne spores
Why are bacteria, fungi , protoctista more present in warm conditions
they grow and reproduce better in warm conditions
how does regularly cleaning door handles reduce transmission of pathogens
Kills germs and pathogens on the door handle- therefore less likely to spread
