A total of 160 strains of Haemophilus influenzae were tested for susceptibility to antibiotics. MICs were determined by the agar dilution method. Seven strains (types a, b, d, and f) were resistant to ampicillin and produced beta-lactamase. Iodometric paper strip test, acidimetric test (with ...
influenzae strains, which was 100% in agreement with clinical beta-lactamase testing. We also identified a divergent highly antibiotic-resistant strain of S. pneumoniae, and found its closest sequenced strains, also isolated from nasopharyngeal samples from over 15 years ...
H. influenzae do not grow on BAP and grow only on chocolate agar as they require X and V factors for growth. H. parainfluenza require only V factor and H. ducreyi only requires X factor. Haemophilus spp. do not produce oxidase. Production of beta-lactamase production should be tested for...
There was good correlation between MICs of ampicillin and the presence of a beta-lactamase and/or a ftsI gene mutation. The prevalence of ampicillin resistance was overestimated using the EUCAST method (33% (34/102)), and underestimated when additional Etest was used (24% (24/102)) (not ...
Haemophilus influenzae isolates recovered from the genitourinary (GU) tract were shown to have a significantly different biotype distribution compared with respiratory tract isolates. Biotype IV strains were recovered more commonly from the GU tract, and most strains were non-serotypable. Antibiotic-susce...
This is the first report of the presence of β-lactamase in NTHi OMVs. We suggest that OMV-derived β-lactamase from coinfecting pathogens such as NTHi and M. catarrhalis may contribute to the occasional treatment failures seen in GAS tonsillitis. non-typeable Haemophilus influenzae, outer mem...
Haemophilus influenzae ATCC 10211 type b; beta lactamase negative Haemophilus influenzae NCT1931 Haemophilus influenzae NCT2699 Haemophilus influenzae NCT3377 type b Haemophilus influenzae ATCC 19418 Haemophilus influenzae ATCC 33533 type b; beta lactamase producer Haemophilus influenzae ATCC 33930 C Haemophilus...
Report of a case and evidence for a beta- lactamase plasmid mobilizable to Escherichia coli by an Inc-W plasmid Sex Transm Dis, 18 (1991), pp. 166-169 CrossrefView in ScopusGoogle Scholar 2 A.W. Sturm Haemophilus influenzae and Haemophilus parainfluenzae in nongonococcal urethritis J ...
influenzae isolates were categorized as beta-lactamase-negative, ampicillin-susceptible (BLNAS) (48.1%), beta-lactamase-positive, ampicillin-resistant (BLPAR) (22.6%), beta-lactamase-negative, ampicillin-resistant (BLNAR) (22.8%), and beta-lactamase-positive, amoxicillin/clavulanateresistant (BLPACR)...
The aim of this study was to investigate whether OMVs isolated from NTHi contain functional β-lactamase and whether the OMVs hydrolyse amoxicillin and thus protect GAS from killing by the antibiotic. Methods The antibiotic susceptibility of isolates was determined using the Etest. The resistance ...