VBS 2032 Exam 4 Questions and Answers Graded A+

VBS 2032 Exam 4 Questions and Answers Graded A+ Why don't "normal" microbiota of the upper respiratory tract cause disease? 1. Competition 2. Immunity 3. Protective effect 4. Non-pathogenic strain 5. Wrong place steps in the pathogenesis of infectious diseases 1. Entry of the pathogen into the body 2. Attachment of the pathogen to some tissue(s) within the body 3. Multiplication of the pathogen 4. Invasion or spread of the pathogen 5. Evasion of host defenses 6. Damage to host tissue(s) Why is strep especially good at infections Hyaluronic acid capsule Why can you get strep throat more than once? So many types of M proteins means a wide variety of antigenic variants. Same reason there is no vaccine. What is the common cold mainly caused by? Rhinoviruses Upper respiratory infections can lead to sinusitis, otitis media, meningitis bronchitis, pneumonia How is TB transmitted? airborne droplets True/False most people exposed to TB develop symptoms False What are two tests for TB? Mantoux skin test and Interferon (IFN) Blood test Why is IFN Blood Test better for TB diagnosis than Mantoux? IFN can distinguish between vaccination positive and true positive How does TB spread in the body? Miliary Why does TB require more than 1 antibiotic? - to prevent drug resistance - more effective therapy What part of the influenza virus binds to the host? HA (Hemagglutin) is flu an RNA or DNA virus RNA (lets it mutate faster) True/False, Spinal fluid usually contains microbes False