pathogen
a bacterium, virus, or other microorganism that can cause disease.
3 main groups of pathogen
the 4th types but no relevance to dentistry
protozoa
prions
-not microorganisms but special infectious protein
-can’t kill by the usual decontamination and sterilization techniques used in dentistry
-specially affected nerve tissue
-files and barbed broaches are single used
Gamma irradiation
industrial sterilisation technique
bacteria
single-cell micro-organisms
have rigid outer walls which determine their shape
cocci
cluster- staphylococci
chains- streptococci
bacilli