Oral Ecology

Question 1

Koch’s Postulates

Answer 1

germ theory of disease
microbes present in every case, isolated and grown in culture, reporduce, recover from infected host

Question 2

benefits of normal flora

Answer 2

synthesis and excrete vitamins - vitK, B12
prevent colonisation by pathogens - competing for attachment sites for nutrients
antagonise other bacteria - production of substances which inhibit/kill foreign species
stimualte development of certain tissues
stimulate production of crossreactive antibodies