A 65-year-old male has developed an abdominal abscess follow…

A 65-year-old male has developed an abdominal abscess following surgery for a bowel resection.  The specimen is sent to the laboratory and the gram stain shows many pleomorphic gram negative bacilli.  Based on this information, which of the following are possible genera?

A first morning sputum is received for culture of mycobacter…

A first morning sputum is received for culture of mycobacteria. It is digested and concentrated by the NALC method. Two Lowenstein Jensen slants are incubated in the dark at 35 degrees C with 5-10% CO2. the smears reveal acid fast bacilli and after 7 days, no growth appears on the slants. The best explanation is: