scholarly journals Third-generation cephalosporin resistance among Gram-negative bacilli causing meningitis in neurosurgical patients: significant challenges in ensuring effective antibiotic therapy

2005 ◽  
Vol 57 (2) ◽  
pp. 356-359 ◽  
Author(s):  
E. O'Neill ◽  
H. Humphreys ◽  
J. Phillips ◽  
E. G. Smyth
Keyword(s):  
Antibiotic Therapy ◽  
Generation Cephalosporin ◽  
Third Generation ◽  
Gram Negative ◽  
Neurosurgical Patients ◽  
Cephalosporin Resistance

scholarly journals Comparative Activity of Several Antimicrobial Agents against Nosocomial Gram-Negative Rods Isolated across Canada

1995 ◽  
Vol 6 (2) ◽  
pp. 76-82 ◽  
Author(s):  
Shelley R Scriver ◽  
Canadian Antimicrobial Resistance Study Group ◽  
Donald E Low
Keyword(s):  
Antimicrobial Agents ◽  
Wide Spectrum ◽  
Generation Cephalosporin ◽  
Third Generation ◽  
Beta Lactamase ◽  
Gram Negative ◽  
The Third ◽  
Cephalosporin Resistance ◽  
Third Generation Cephalosporins ◽  
Group 1

In 1992, a surveillance study was performed in Canada to determine the susceptibility of nosocomial Gram-negative rods to several wide spectrum antimicrobials. Consecutive isolates from 10 institutions, as well as additional strains of selected species of Enterobacteriaceae that are known to possess the Bush group 1 beta-lactamase, were tested for susceptibility to 12 antimicrobials. Third-generation cephalosporin resistance was found to be as high as 29% inEnterobacter cloacaethat possesses the Bush group 1 beta-lactamase and less than 4% in those isolates not possessing this enzyme. Cefepime equalled or exceeded the activity of the third-generation cephalosporins against the species of Enterobacteriaceae that demonstrated resistance to the third-generation cephalosporins.

scholarly journals Third-Generation Cephalosporin Resistance inShigella sonnei, Argentina

2001 ◽  
Vol 7 (3) ◽  
pp. 442-443 ◽  
Author(s):  
Marcela Radice ◽  
Cristina González ◽  
Pablo Power ◽  
María del Carmen Vidal ◽  
Gabriel Gutkind
Keyword(s):  
Generation Cephalosporin ◽  
Third Generation ◽  
Cephalosporin Resistance

scholarly journals Third-Generation Cephalosporin-Resistant Spontaneous Bacterial Peritonitis: A single-Centre Experience and Summary of Existing Studies

2014 ◽  
Vol 28 (2) ◽  
pp. 83-88 ◽  
Author(s):  
Jennifer Chaulk ◽  
Michelle Carbonneau ◽  
Hina Qamar ◽  
Adam Keough ◽  
Hsiu-Ju Chang ◽  
...  
Keyword(s):  
Spontaneous Bacterial Peritonitis ◽  
Tertiary Care ◽  
Generation Cephalosporin ◽  
Care Hospital ◽  
Third Generation ◽  
Bacterial Peritonitis ◽  
Common Diagnosis ◽  
Cephalosporin Resistance ◽  
Third Generation Cephalosporins ◽  
Culture Positive

BACKGROUND: Spontaneous bacterial peritonitis (SBP) is the most prevalent bacterial infection in patients with cirrhosis. Although studies from Europe have reported significant rates of resistance to third-generation cephalosporins, there are limited SBP-specific data from centres in North America.OBJECTIVE: To evaluate the prevalence of, predictors for and clinical impact of third-generation cephalosporin-resistant SBP at a Canadian tertiary care centre, and to summarize the data in the context of the existing literature.METHODS: SBP patients treated with both antibiotics and albumin therapy at a Canadian tertiary care hospital between 2003 and 2011 were retrospectively identified. Multivariate logistic regression was used to determine independent predictors of third-generation cephalosporin resistance and mortality.RESULTS: In 192 patients, 25% of infections were nosocomial. Forty per cent (77 of 192) of infections were culture positive; of these, 19% (15 of 77) were resistant to third-generation cephalosporins. The prevalence of cephalosporin resistance was 8% with community-acquired infections, 17% with health care-associated infections and 41% with nosocomial acquisition. Nosocomial acquisition of infection was the only predictor of resistance to third-generation cephalosporins (OR 4.0 [95% CI 1.04 to 15.2]). Thirty-day mortality censored for liver transplantation was 27% (50 of 184). In the 77 culture-positive patients, resistance to third-generation cephalosporins (OR 5.3 [1.3 to 22]) and the Model for End-stage Live Disease score (OR 1.14 [1.04 to 1.24]) were independent predictors of 30-day mortality.CONCLUSIONS: Third-generation cephalosporin-resistant SBP is a common diagnosis and has an effect on clinical outcomes. In an attempt to reduce the mortality associated with resistance to empirical therapy, high-risk subgroups should receive broader empirical antibiotic coverage.

scholarly journals Characterization of AmpC-hyperproducing Escherichia coli from humans and dairy farms collected in parallel in the same geographical region

2020 ◽  
Vol 75 (9) ◽  
pp. 2471-2479 ◽  
Author(s):  
Maryam Alzayn ◽  
Jacqueline Findlay ◽  
Hannah Schubert ◽  
Oliver Mounsey ◽  
Virginia C Gould ◽  
...  
Keyword(s):  
Risk Factors ◽  
Phylogenetic Analysis ◽  
Human Population ◽  
Dairy Farms ◽  
Generation Cephalosporin ◽  
Third Generation ◽  
E Coli ◽  
Increased Risk ◽  
Amoxicillin Clavulanate ◽  
Cephalosporin Resistance

Abstract Objectives To characterize putative AmpC-hyperproducing third-generation cephalosporin-resistant E. coli from dairy farms and their phylogenetic relationships; to identify risk factors for their presence; and to assess evidence for their zoonotic transmission into the local human population. Methods Proteomics was used to explain differences in antimicrobial susceptibility. WGS allowed phylogenetic analysis. Multilevel, multivariable logistic regression modelling was used to identify risk factors. Results Increased use of amoxicillin/clavulanate was associated with an increased risk of finding AmpC hyperproducers on farms. Expansion of cephalosporin resistance in AmpC hyperproducers was seen in farm isolates with marR mutations (conferring cefoperazone resistance) or when AmpC was mutated (conferring fourth-generation cephalosporin and cefoperazone resistance). Phylogenetic analysis confirmed the dominance of ST88 amongst farm AmpC hyperproducers but there was no evidence for acquisition of farm isolates by members of the local human population. Conclusions Clear evidence was found for recent farm-to-farm transmission of AmpC-hyperproducing E. coli and of adaptive mutations to expand resistance. Whilst there was no evidence of isolates entering the local human population, efforts to reduce third-generation cephalosporin resistance on dairy farms must address the high prevalence of AmpC hyperproducers. The finding that amoxicillin/clavulanate use was associated with an increased risk of finding AmpC hyperproducers is important because this is not currently categorized as a highest-priority critically important antimicrobial and so is not currently targeted for specific usage restrictions in the UK.

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