All H. haemolyticus strains showed hemolysis on horse blood agar and there were no other Haemophilus spp., nonhemolytic H. haemolyticus and H. influenzae variant strains that had absent iga gene.
To compare IgA1 protease activity in nontypeable H influenzae strains isolated from patients with symptomatic Haemophilus infection (sputum, cerebrospinal fluid, blood, or normally sterile tissue) vs strains from throat swabs of asymptomatic carriers and to compare iga gene carriage and variability in nontypeable H influenzae strains.