title: Distribution of biotypes of Haemophilus influenzae and H parainfluenzae in patients with cystic fibrosis.
abstract: One hundred and eighty eight isolates of Haemophilus influenzae and 187 isolates of H parainfluenzae from patients with cystic fibrosis, patients with respiratory infections but without cystic fibrosis, and patients with neither cystic fibrosis nor respiratory infections were biotyped. Biotype I of H influenzae were found significantly more often in patients with cystic fibrosis compared with those with normal respiratory tracts. On the other hand, biotype II strains of H influenzae were found less often in the cystic fibrosis group. Half of the biotype V strains produced beta-lactamase.
mesh_terms: D003550:Cystic Fibrosis / Q000382:microbiology*; D006190:Haemophilus / Q000145:classification / Q000302:isolation & purification* / Q000378:metabolism; D006193:Haemophilus influenzae / Q000145:classification / Q000302:isolation & purification* / Q000378:metabolism; D006801:Humans; D011166:Porphyrins / Q000096:biosynthesis; D012703:Serotyping; D001618:beta-Lactamases / Q000378:metabolism
chemical_list: D011166:Porphyrins; D001618:beta-Lactamases