Table 1.

Biochemical and physiologic characteristics ofW. confusa (L. confusus) isolate in a patient with polymicrobial bacteremia

TestResult with patient's isolateResult from the literature
Hemolysis
 BAP, ambientAlphaAlpha
 BAP, anaerobicAlphaAlpha
 BAP, CO2 AlphaAlpha
Gram stainGram-positive coccobacilli/short rodsGram-positive coccobacilli/short rods
ArrangementChainChain
CatalaseNegativeNegative
Bile-esculinPositivePositive
Growth:
 At 25°CPositivePositive
 At 35°CPositivePositive
 At 42°CPositivePositive
Pyroglutamyl aminopeptidaseNegativeNegative (positive in some [11])
Esculin hydrolysisPositivePositive
MotilityNonmotileNonmotile
Arginine deaminationPositivePositive
Acetoin productionNegativeNegative
H2S productionNegativeNegative
Acidification of:
 GlucosePositivePositive
 XylosePositiveNegative
 MannitolNegativeNegative
 LactoseNegativeNegative
 SucrosePositivePositive
 MaltosePositivePositive
 FructosePositivePositive
 SalicinPositivePositive
 ArabinoseNegativeNegative
 RhamnoseNegativeNegative
 TrehaloseNegativeNegative