scholarly journals Characterization of non-beta-lactamase-mediated ampicillin resistance in Haemophilus influenzae.

1984 ◽  
Vol 26 (2) ◽  
pp. 235-244 ◽  
Author(s):  
P M Mendelman ◽  
D O Chaffin ◽  
T L Stull ◽  
C E Rubens ◽  
K D Mack ◽  
...  
Keyword(s):  
Haemophilus Influenzae ◽  
Beta Lactamase ◽  
Ampicillin Resistance

Clarification of the structure of the ampicillin-resistance plasmid RSF0885 from Haemophilus influenzae HR-885 serotype b

1994 ◽  
Vol 40 (2) ◽  
pp. 154-157 ◽  
Author(s):  
W. L. Albritton ◽  
P. A. Noble ◽  
K. D. Webster
Keyword(s):  
Escherichia Coli ◽  
Haemophilus Influenzae ◽  
Sequencing Data ◽  
Original Source ◽  
Ampicillin Resistance ◽  
Resistance Plasmid ◽  
Haemophilus Parainfluenzae ◽  
Serotype B ◽  
Restriction Enzyme Maps

The nonconjugative ampicillin-resistance plasmid RSF0885 has been reported to be as small as 2.9 MDa and as large as 4.1 MDa with at least two restriction enzyme maps reported. In addition, the source of the original plasmid has been reported to be Haemophilus influenzae and Haemophilus parainfluenzae. Characterization of the source strains and sequencing data of the plasmids revealed that H. influenzae serotype b was the original source strain and that ISI-K in the larger plasmid was presumably acquired when the smaller plasmid was maintained in Escherichia coli in S. Falkow's laboratory during the late 1970s.Key words: Haemophilus influenzae, Haemophilus parainfluenzae, RSF0885, ampicillin resistance, ISI-K

scholarly journals Characterization of clinical isolates of beta-lactamase-negative, highly ampicillin-resistant Enterococcus faecalis.

1996 ◽  
Vol 40 (10) ◽  
pp. 2420-2422 ◽  
Author(s):  
E Cercenado ◽  
M F Vicente ◽  
M D Díaz ◽  
C Sánchez-Carrillo ◽  
M Sánchez-Rubiales
Keyword(s):  
Enterococcus Faecalis ◽  
Binding Protein ◽  
Clinical Isolates ◽  
Beta Lactamase ◽  
Penicillin Binding Protein ◽  
Ampicillin Resistance

We analyzed the penicillin-binding protein (PBP) profiles of two clinical isolates of Enterococcus faecalis for which ampicillin MICs were 32 and 64 micrograms/ml. Six PBPs were detected in both isolates, demonstrating an apparently increased amount of PBP 5 and decreased penicillin binding of PBPs 1 and 6. These results suggest that ampicillin resistance in the clinical isolates of E. faecalis described could be associated with alterations in different PBPs.

scholarly journals Detection of beta-lactamase-negative ampicillin resistance in Haemophilus influenzae in Belgium

2019 ◽  
Vol 93 (3) ◽  
pp. 243-249 ◽  
Author(s):  
Lise Schotte ◽  
Magali Wautier ◽  
Delphine Martiny ◽  
Denis Piérard ◽  
Melissa Depypere
Keyword(s):  
Haemophilus Influenzae ◽  
Beta Lactamase ◽  
Ampicillin Resistance
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