meningoseptica" may show colistin-resistant and vancomycin-sensitive growth, which is paradoxic for a Gram-negative bacterium, but resembles "Burkholderia cepacia", which is also a nonfermenter and does not grow well on MacConkey agar.These two can be distinguished by the indole test or the Pyr test, both of which should be clearly negative for "B. cepacia" and positive for "E. meningoseptica".