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  How is Neisseria meningitidis most commonly spread?    

  All of the following enzymes are produced by staphylococci, except  

Which of the following public health issues is uniting scientists from across the world to develop strategies to address it?

  Why should antimicrobial susceptibility testing of normal flora isolates or isolates likely to represent contamination or colonization not be performed?  

  Because biosafety level 3 (BSL-3) organisms have the potential for aerosol transmission, and diseases with these agents may have serious lethal consequences, all of the following guidelines apply to BSL-3 laboratories, except:  

  What media does Corynebacterium diphtheriae grow on?    

What test is performed to determine if Corynebacterium diphtheriae is a toxigenic strain of an organism?

  This constituent of a gram-positive cell wall absorbs crystal violet but is not dissolved by alcohol, thus giving the gram-positive cell its characteristic purple color.  

  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.  

Screening is