Nonpathogenic commensal Neisseria spp. include all the following, except    

  In any susceptibility system, variables that can affect the results include the following:1. Antibiotic potency2. Inoculum concentration3. Bactericidal level4. pH5. Anion content  

Why is it that although Nocardia spp. grow on most common nonselective laboratory media, many are missed when the cultures are read?

  Penicillins, cephalosporins, monobactams, and carbapenems all have this ring in their structure that is responsible for inhibiting the transpeptidation reaction, resulting in bacterial lysis and cell death.  

When microbiologists set up a biochemical identification using a commercial system on a suspected pathogen from a culture, they must

What does a lysine iron agar (LIA) slant contain?

Which of the following descriptions will directly facilitate identification of bacteria?

When differentiating colony size on the culture plates, what organisms generally have the larger colonies by comparison?

Gamma (g)-hemolysis is

Beta (b)-hemolysis is