Validating carrier definition microbiology
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Most of the terminology used to define the host-microbe interaction has been in use for nearly a century. Early in this period, microbes were thought to be primary aggressors that governed the host-pathogen interaction, resulting in disease. Later, new information about the attributes of microbes and their hosts resulted in the understanding that the host-pathogen interaction does not always result in disease. This recognition, in turn, led to the introduction of terms to explain states in which microbes exist within hosts without causing overt disease and why some microbes only cause disease in certain hosts. Commensal, carrier state, and opportunist were terms put forth to account for microbes and conditions that were sometimes associated with disease but for which Koch's postulates could not be fulfilled for one reason or another.
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A few weeks ago, we explained EN and why it is particularly important for European manufacturers of disinfectants. Today, we will try to compare two significant test methods listed in the norm and how they are carried out in laboratories to determine if a disinfectant is effective or not. The standard European method of disinfectant validation is comprised of 3 phases and they are determined by the type of test carried out. The methods used come progressively closer to simulate actual environments with each successive phase.
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