Just how resistant are endospores? Several documented cases have reported
the astonishing ability for endospores to remain viable, or capable of germinating
back into vegetative cells. Below are a few of the more famous published
A suspension of Clostridium Aceticum was prepared in 1947 and thirty-four
years later cultured onto nutrient agar media; growth commenced in less
than 12 hours.
"34 Year Old Clostridium Spores" (5)
Microbiologists examined debris from a Roman archeological site in the
United Kingdom. The debris was over 2,000 years old but a significant
number of viable Thermoactinomyes species were cultured. Thermoactinomyes
spores were also recovered in a Minnesota lake over 7,000 years old.
In 1995, a group of scientists reported the recovery of bacterial spores
from the gut of an extinct bee 25 - 40 million years old. The bee was
allegedly trapped and preserved in amber. Samples of bee tissue incubated
in sterile culture yielded endospore forming bacteria.
Scientist also claimed the isolation of halophilic bacterial endospores
from salt crystals of the Permian age, over 250 million years old.
"250 Million Year Old Crystals Containing Viable Endospores"
All of the above cases stressed the highest degree of no contamination
from outside sources.
HOME | DEFINTION
| STAIN | RESISTANCE | DISEASES |