pathogens Flashcards
what is a pathogen ?
. a disease causing micro - organism
are all micro - organisms pathogens?
. no, some can be harmless some can even be used for antobiotics
what are the 4 examples of pathogens?
. bacteria
. viruses
. protists
. fungi
what does a bacteria cell contain?
. a cytoplasm
. no nucleus just a circular strand of DNA
how do bacteria reproduce?
. by dividing in two to form clones
What are the features of viruses ?
. smaller than bacteria
. have a protein coat
how do viruses reproduce?
. can only reproduce in a host cells, reproducing virus destorys cell meaning virus is free to attack other cells
how are communicable diseases spread?
. contact
. aerosol
. bodily fluids
. water
. insects
. contaminated food