TABLE 1.

Biotyping results obtained with three commercial test systems for 208 strains of Haemophilus influenzae and 172 strains of Haemophilus parainfluenzae

OrganismaBiotypeExpected reaction with:Total no. of isolatesIDS RapID NH systemNHI cardAPI NH strip
No. of isolates correctly biotypedNo. of isolates with errors for:No. of isolates correctly biotypedNo. of isolates with errors for:No. of isolates correctly biotypedNo. of isolates with errors for:
OrnithineUreaseIndoleOrnithineUreaseIndoleOrnithineUreaseIndoleOrnithineUreaseIndole
Haemophilus influenzae I+++23230002210023000
II++10579800105000102201
III+63162006211062100
IV++5500050005000
V++5500041005000
VI+5500050005000
VII+2200011002000
Total2084816000204410204301
Haemophilus I+645834054100061130
    parainfluenzaeII++58570015350158000
III+22616002200022000
IV+++2111020002000
V26260002600024200
Total17214820511571501167330
  • a Strains of H. influenzae biotype VIII and H. parainfluenzae biotypes VI, VII, and VII were not available for inclusion in this study.