TABLE 1.

Characterization of seven clinical isolates incorrectly identified as H. influenzae

StrainOriginResults of testing fora:Classification
fucKhapsodCPorphHemONPGManSuc
PN100Urine00++00++H. parainfluenzae
PN116Ear00++0+++H. parainfluenzae
PN118Skin00++000+H. parainfluenzae
PN124Trachea00+000+0Variant strain
PN129Sputum00++++0+H. parahaemolyticus
PN134BAL fluid0++0000+Variant strain
PN137Larynx0+++0+0+H. parahaemolyticus
  • a 0, negative; +, positive; Porph, synthesis of porphyrins from δ-aminolevulinic acid; Hem, hemolysis; ONPG, hydrolysis of o-nitrophenyl-β-d-galactopyranoside; Man, fermentation of d-mannose; Suc, fermentation of sucrose.