18. Entamoeba histolytica is the causative organism in amoebicdysentery. This organism is a(n)
     Protozoan
     Bacterium
     Fungus
     Virus
20. Antibiotic-induced diarrhea is most often caused by anovergrowth of this specific bacterium:
     Clostridium difficile
     Clostridium perfringens
     Candida albicans
     Yersinia pestis
22. Acute glomerulonephritis is a late-developing consequence ofwhich of the following diseases?
     Streptococcal pharyngitis (strepthroat)
     Influenza
     Rhinosinusitis
     Pneumonia
31. The opportunistic pathogen often responsible for causingnecrotizing fasciitis (also known as the \"flesh-eating bacteria\")in healthy young adults is called:
     Staphylococcus epidermis
     Streptococcus pyogenes
     Bacillus subtilis
     Streptococcus pneumoniae
