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Normal resident microbes are absent from the
a. pharynx
b. lungs
c. intestine
d. hair follicles
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- Caseous lesions containing inflammatory white blood cells area. lepromas b. pseudomembranes c. eschars d. tuberclesThe bubo of bubonic plague is a/ana. ulcer where the flea bite occurredb. granuloma in the skinc. enlarged lymph noded. infected sebaceous glandSome patients who take antibiotics for acne develop yeast infections of the mouth or genitourinary tract. Explain
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- Which of the following is NOT true of bacterial exotoxins? 1. Important in the pathogenesis of many human diseases 2. Their toxic effect can be systemic, affecting cells distant from the primary site of infection 3. None of the other four answers (All are true of bacterial exotoxins) 4. Different exotoxins may affect different types of cells (e.g., nerves, gastrointestinal mucosa) 5. Some exotoxins have two components, A (active) and B (binding)Which infectious agent is an obligate parasite?a. Mycobacterium tuberculosisb. Corynebacterium diphtheriaec. Mycobacterium lepraed. Clostridium difficileThe severe symptoms of pertussis are due to what effect(s)?a. irritation of the glottis by the microbeb. pneumoniac. the destruction of the respiratory epitheliumd. blocked airwayse. both c and d are involved