spreading pathogens Flashcards
why do pathogens spread from one host to another?
they can’t grow outside their host
increase in numbers
how are they spread?
through the air from coughs and sneezes
or
water e.g cholera
why are diseases such as cholera, typoid and dysentry very rare in developed countries and occur more in less developed countries?
developed:
water is treated - kills pathogens
good hygeine
less developed:
good hygeine is difficult to maintain
major environmental diasters
contaminated water sources
what is the name for when a pathogen spreads through the digestive system and food?
oral route
how does ebola enter the body?
through broken skin, eyes, nose or mouth
why did ebola become an epidemic?
people got infected when burying those who died from ebola
what is the best way to avoid ebola virus infection and why?
wearing full body protection
virus is present in all body fluids of infected people even after death
how is the malaria protist spread?
it is carried in the blood by mosquitoes that sucked blood from an infected person
mosquito injects protist directly into the blood of the next person it feeds on
what do you call and organism that carries pathogens from one person to the next?
vectors of disease
