Multiple choice Which of the following are facultative anaerobic Gram-negative bacteria? Bordetella pertussis and Mycobacterium tuberculosis Mycobacterium tuberculosis and Klebsiella pneumoniae Bordetella pertussis and Vibrio cholerae Klebsiella pneumoniae and Vibrio cholerae Klebsiella pneumoniae and Vibrio cholerae Reveal answer Fill a bubble to check yourself E Correct answer Explanation Klebsiella pneumoniae is a Gram-negative, facultative anaerobic, rod-shaped bacterium. Vibrio cholerae is a Gram-negative, facultative anaerobic, comma-shaped bacterium.