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Table 5 Distribution of beta-lactamase positive ampicillin-resistant Haemophilus parainfluenzae isolates in patients with sarcoidosis

From: Changes in the prevalence and biofilm formation of Haemophilus influenzae and Haemophilus parainfluenzae from the respiratory microbiota of patients with sarcoidosis

Biotype Nasopharynx Sputum
Resistance profile (No. of isolates) MICAm (μg/ml) Resistance profile (No. of isolates) MICAm (μg/ml)
I Am (1) 24 AmTe (1) 4
AmSxt (1) >256 AmTe (1) 48
AmCtxCazSxt (1) 8   
AmTeSxt (1) 128   
III AmCtxCazTeSxt (1) 6   
AmTeSxt (1) 6   
  1. Abbreviations: Am ampicillin, Caz ceftazidime, Ctx cefotaxime, Te tetracycline, Sxt trimethoprim/sulfametoxazole
  2. Ampicillin breakpoints used for interpretation of minimal inhibitory concentration (MICAm): susceptible ≤1 μg/ml, intermediate = 2 μg/ml and resistant ≥ 4 μg/ml, according to [25]