communicable diseases Flashcards
what is a communicable disease
wa disease caused by a pahtogen that can be transferred from one person to another
what us a non communicable disease
a disease thaf cannot be passed from one person to another
what is a pathogen
microorganisms that cause infectious disease
how can pathogens be spread
direct contact, by water or air
how can we prevent the spread of communicable diseases
good hygiene such as handwashing and use of disinfectant m, by isolating infected people by destroying vectors that transmit the disease and by vaccines
ahy do bacterial infections cause us to feel ill
the bacteria produces poisons that damage tissues and make us feel ill
why do viral infections make us feel ill
the viruses kive and reproduce inside living cells which causes cell damage
what is measles
a viral disease that causes fever and a red skin rash, it can be fatal and is spread by droplets in coughs and sneezes
what is hiv
a viral disease that initially causes flu like symptoms that then attack the bodys immune cells, spread by sexual contact or exchange of bodily fluids
what is tobacco mosaic virus
a plant pathogen that causes a discolouration of leaves which affects growth as it causes less s photosynthesis, affects a lot of plants including tomatoes
what is salmonella
a bacterial disease spread in food that causes food poisoning, can cause fever, cranps, vomiting and diarrhoea
what is gonorrhea
a sexually transmitted bacterial disease which can cause a thick uellow discharge aswell as pain while urinating
what is rose black spot
a fungal disease in plants that causes purple or black spits on leaves, spread by wind or water
what pathogen causes malaria
protists
what is malaria
a disease caused by protists that can cause fever and death
