- Urease operon and urease activity in commensal and disease-causing nontypeable Haemophilus influenzae.
Urease operon and urease activity in commensal and disease-causing nontypeable Haemophilus influenzae.
Journal of clinical microbiology (2012-12-12)
Lixin Zhang, Mayuri Patel, Jingping Xie, Gregg S Davis, Carl F Marrs, Janet R Gilsdorf
PMID23224103
ABSTRACT
The ure operon was significantly more prevalent in Haemophilus influenzae isolates causing otitis media and chronic obstructive pulmonary disease (COPD)-associated bronchitis than in those from throats of healthy individuals (97% versus 78.1%, P < 0.001). Strains lacking the ure operon are over 8 times more likely to be from the throat than either otitis media or COPD isolates.
MATERIALS
Product Number
Brand
Product Description
Sigma-Aldrich
Urease from Canavalia ensiformis (Jack bean), Type C-3, powder, ≥600,000 units/g solid
Sigma-Aldrich
Urease from Canavalia ensiformis (Jack bean), Type III, glycerol solution, 500-800 units/mL
Sigma-Aldrich
Urease from Canavalia ensiformis (Jack bean), Type IX, powder, 50,000-100,000 units/g solid
Sigma-Aldrich
Urease from Canavalia ensiformis (Jack bean), Type III, powder, 15,000-50,000 units/g solid