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Ampicillin resistance in Neisseria denitrificans: studies on ampicillin-sensitive enzymes
Canadian Journal of Microbiology, 1981The β-lactam sensitivities of enzymes involved in peptidoglycan synthesis were examined in two strains of Neisseria 'enitrificans having widely disparate degrees of ampicillin sensitivity. One strain of N. denitrificans was 400 times more resistant) ampicillin than the other; the former is known to have altered pencillin-binding proteins.
MacKenzie, Colin +2 more
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Analytical Chemistry
The establishment of rapid target identification and analysis methods for antibiotic resistance genes (ARGs) is urgently needed. In this study, we unprecedently designed a target-catalyzed hairpin assembly (CHA) electrochemiluminescent (ECL) biosensor ...
Ziwang Mao +5 more
semanticscholar +1 more source
The establishment of rapid target identification and analysis methods for antibiotic resistance genes (ARGs) is urgently needed. In this study, we unprecedently designed a target-catalyzed hairpin assembly (CHA) electrochemiluminescent (ECL) biosensor ...
Ziwang Mao +5 more
semanticscholar +1 more source
Beta-lactamases in ampicillin-resistant enterobacteriaceae
Infection, 198342% of 284 ampicllin-resistant enterobacteriaceae revealed no spontaneous production of β-lactamases. 27 strains exhibited the production of more than one single enzyme (mostlyKlebsiella andEnterobacter spp. isolates). The production of identical enzymes does not lead to a uniform resistance pattern, but β-lactamase producing strains showed a higher ...
W, Opferkuch, W, Cullmann
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Characterization of Ampicillin-Resistant Genes in Vibrio Parahaemolyticus
SSRN Electronic Journal, 2022Vibrio parahaemolyticus is strongly resistant to ampicillin (AMP). In this study, AMP-resistant genes in V. parahaemolyticus ATCC33846 were characterized. Transcriptomic analysis of V. parahaemolyticus exposed to AMP revealed 4608 differentially transcribed genes, including 670 significantly up-regulated genes and 655 significantly down-regulated genes.
Xin, Tan +4 more
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Escherichia coli Resistant to Ampicillin/Sulbactam
Chemotherapy, 2009Escherichia coli strains resistant to ampicillin/sulbactam from hospitals in 4 different geographic locations were examined with respect to type and amount of β-lactamase produced. A total of 5 strains was examined from each region. The isoelectric points of all of the involved β-lactamases were 5.4, corresponding to TEM-1.
R H, Eng +6 more
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JAMA: The Journal of the American Medical Association, 1973
To the Editor.— Ampicillin has been recommended as the antibiotic of choice for the treatment of Shigella infections. 1 However, the recent rise in incidence of ampicillin-resistant Shigella may be forcing clinicians to reevaluate the effectiveness of ampicillin.
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To the Editor.— Ampicillin has been recommended as the antibiotic of choice for the treatment of Shigella infections. 1 However, the recent rise in incidence of ampicillin-resistant Shigella may be forcing clinicians to reevaluate the effectiveness of ampicillin.
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Ampicillin resistant Haemophilus parainfluenzae endocarditis
The American Journal of the Medical Sciences, 1979A case of Haemophilus parainfluenzae bacterial endocarditis is described. This is the first reported case of endocarditis caused by ampicillin resistant H parainfluenzae. Resistance was not mediated by a beta lactamase. Ampicillin therapy had not controlled the infection, but a four-week course of chloramphenicol was curative.
P W, Smith, W A, Chambers, C A, Walker
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Biochemical and Biophysical Research Communications
Due to the rapid emergence of antibiotic resistant new bacterial strains and new infections, there is an urgent need for novel or newly modified and efficient alternatives of treatment. However, conventional antibiotics are still used in therapeutic settings but their efficacy is uncertain due to the rapid evolution of drug resistance.
Sourav Chakraborty +4 more
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Due to the rapid emergence of antibiotic resistant new bacterial strains and new infections, there is an urgent need for novel or newly modified and efficient alternatives of treatment. However, conventional antibiotics are still used in therapeutic settings but their efficacy is uncertain due to the rapid evolution of drug resistance.
Sourav Chakraborty +4 more
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Ampicillin-Resistant Listeria monocytogenes Meningitis
Archives of Neurology, 1986To the Editor. —We read with interest the report by Rapp et al 1 of the occurrence of ampicillin-resistant Listeria monocytogenes meningitis in a previously healthy 14-year-old athlete. We have recently reviewed 54 cases of proven juvenile and adult listerial infection of the central nervous system (CNS) reported to the Public Health Laboratory ...
S S, Pollock +2 more
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Enterococcus faecium resistant to ampicillin and gentamicin
International Journal of Antimicrobial Agents, 1992Thirty ampicillin-resistant enterococci were isolated from clinical specimens at our institution, 28 of these over a six month period. All were identified as Enterococcus faecium with an MIC(90) to ampicillin ond penicillin of 32 and 128 mug/ml, respectively.
D T, Tsukayama +2 more
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