Identification Table 8
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Table 8. Tests useful for the identification of Leuconostoc species and their differentiation from Pediococcus species, vancomycin-resistant enterococci, viridans group streptococci, and Aerococcus viridans. 
Organism Gram morphology Vancomycin PYR LAP Bile esculin
Leuconostoc pairs, chains R neg neg V
Pediococcus pairs, clusters, tetrads R neg + V
Enterococcus, vancomycin resistant See Table 2

Table 7		 pairs, chains R + + +
Viridans group streptococci chains S neg + neg
Aerococcus viridans clusters S + neg V

KEY:  PYR, pyrrolidonyl aminopeptidase test; LAP, leucine aminopeptidase test; +, positive; V, variable

From M042-5 Blood isolate: Leuconostoc mesenteroides. August 2004.
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