Hard shell-like protective encasement that enables some microorganisms (such as Clostridium) to survive bactericidal chemicals and extreme conditions of cold, heat, and dryness. A microorganism
in spore form
, although dormant, is much harder to kill
than when it is in active
form. Diseases caused by spores include anthrax, botulism
, gas gangrene, and tetanus. Spores are destroyed only by sterilization
. From Greek 'sporos,' seed.