The statement "These methods are bacteriostatic rather than bactericidal" identifies the major disadvantage of both cold and desiccation in terms of microbial control.
Unlike bactericidal agents, which effectively kill the microorganisms, bacteriostatic agents only impede or prevent their growth.
Cold method of microbial control
In the refrigerator, cold temperatures are employed to prevent the growth of microorganisms. Microbial metabolism slows down and its reproduction rate is decreased at low temperatures.
However, microbes are not always wiped out by freezing temperatures which means that this method is bacteriostatic.
Desiccation method of microbial control
Desiccation or Drying is a process that involves taking organic material's water content out in order to preserve it.
After samples are cooled to below-freezing levels, cells and tissues can be preserved by desiccation; after that, they can be kept at room temperature.
The limitation of this method is that it is bacteriostatic rather than bactericidal.
Insufficient water prevents microbial enzymes from working.
Hence, The statement "These methods are bacteriostatic rather than bactericidal" identifies the major disadvantage of both cold and desiccation in terms of microbial control.
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