communicable diseases Flashcards
give the four types of pathogen
bacteria viruses protist fungal
what is a protist?
single-celled organisms that cause diseases in their hosts
give an example of a protist
malaria which is spread by mosquitoes
what is a virus
DNA or RNA surrounded by a protein coat
give four non-specific human defences
the nose, respiratory system, stomach acid and skin
what is a toxin
a type of natural poison produced by an organism
how is measles transmitted and how was it controlled?
droplets infection from sneeze and cough- vaccination as a child
how is HIV transmitted and controlled?
sexual contact and exchange of bodily fluid- anti retrieval drugs and use of condoms
how is salmonella transmitted and controlled?
food prepared and unhygienic conditions or not cooked properly-improved food hygiene, wash hands
how is Malaria transmitted and controlled?
buy an animal vector- prevent the breeding of mosquitoes
what is an antigen?
proteins on the surface of pathogens
what are antibodies?
proteins produced by lymphocytes
what is bacteria?
pathogens that produce toxins that damage tissue which makes you feel ill
what is a virus?
pathogens that live and reproduce inside cells causing damage
