MIC 205 Final Exam Questions with Correct Answers
MIC 205 Final Exam Questions with Correct Answers Why are vaccines important for protection against exotoxin induced diseases such as tetanus and diphtheria - Answer--they induce protection of specific antibodies that will immediately bind the toxin if encountered later, providing fast protection -following initial exposure to exotoxin, antibody production takes time during which the exotoxin may cause extensive damage or even death Koch's 4 postulates in order: - Answer-1. microorganism must be present in every case of the disease 2. organism must be grown in pure culture from diseased hosts 3. same disease must be produced when a pure culture of the organism is introduced into susceptible host 4. organism must be recovered from the experimentally infected hosts Bacteremia - Answer-presence of bacteria in the bloodstream Toxemia - Answer-presence of toxins circulating in the bloodstream viremia - Answer-presence of viruses or viral particals in the blood Most exotoxins fall into 3 categories that reflect structure and mechanism of action: - Answer-1. superantigens 2. A-B toxins 3. membrane-damaging toxins
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