Which genus is identified by UV fluorescence in combination with nitrate reduction?

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Multiple Choice

Which genus is identified by UV fluorescence in combination with nitrate reduction?

The key idea is that Veillonella can be identified by a combination of two traits: nitrate reduction and UV fluorescence. Veillonella are Gram-negative anaerobic cocci that reduce nitrate to nitrite, and they possess porphyrin pigments that cause colonies to fluoresce under ultraviolet light. This dual signature is distinctive for Veillonella and helps separate it from the other genera listed, which are either Gram-positive cocci (Streptococcus and Enterococcus) or Gram-negative rods (Bacteroides) and do not show this same UV fluorescence pattern in combination with nitrate reduction. So when you see a nitrate-reducing, UV-fluorescent anaerobic coccus, Veillonella is the best match.

The key idea is that Veillonella can be identified by a combination of two traits: nitrate reduction and UV fluorescence. Veillonella are Gram-negative anaerobic cocci that reduce nitrate to nitrite, and they possess porphyrin pigments that cause colonies to fluoresce under ultraviolet light. This dual signature is distinctive for Veillonella and helps separate it from the other genera listed, which are either Gram-positive cocci (Streptococcus and Enterococcus) or Gram-negative rods (Bacteroides) and do not show this same UV fluorescence pattern in combination with nitrate reduction. So when you see a nitrate-reducing, UV-fluorescent anaerobic coccus, Veillonella is the best match.

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