. They are so hard to kill because of their structure. They have a unique cellular structure. They have a hard outer coat surrounding the spore. This makes it hard for disinfectants to penetrate. There is a very thick layer beneath the coat call the cortex. This gives it resistance to heat. There is a germ cell wall under the cortex.Under the germ cell is the inner membrane and it is a permeability barrier against many potentially damaging chemicals.
"In Biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions." -Wikipedia
When harsh conditions exist, the spores will enter dormancy, and will only resume activity or growth when favorable conditions exist.
The hard covering protects the spore inside, as does the hard shell of an acorn, for example.
hey have an outer shell
why are resistant spores useful to bacteris
ssa
Spores are highly resistant forms of bacterial cells.
B. megaterium spores are 12 times more resistant than S. aureus.
spores
why are resistant spores useful to bacteris
ssa
Microorganisms that are in a dormant or contain endospores are the most resistant.
spores
Spores are highly resistant forms of bacterial cells.
Granites are one of the most weather resistant rocks.
heat resistant, and will germinate when conditions are favorable
create resistant spores
resting or dormant type of cell that is highly resistant to environmental extremes (heat, dessication, oxygen, radiation, disinfectants).
Encapsulated bacterial cells are very resistant and least affected by chemicals, dessication and the action of phagocytes.
B. megaterium spores are 12 times more resistant than S. aureus.
The most resistant organism in the healthcare environment is the bacterial spor