scholarly journals Antimicrobial Susceptibility of Staphylococcus aureus Isolated from Bovine Mastitis in Europe and the United States

2000 ◽  
Vol 83 (4) ◽  
pp. 855-862 ◽  
Author(s):  
A.P. De Oliveira ◽  
J.L. Watts ◽  
S.A. Salmon ◽  
F.M. Aarestrup
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Antimicrobial Susceptibility ◽  
Bovine Mastitis ◽  
The United States

scholarly journals Genetic and Serologic Evaluation of Capsule Production by Bovine Mammary Isolates of Staphylococcus aureus and Other Staphylococcus spp. from Europe and the United States

2000 ◽  
Vol 38 (8) ◽  
pp. 2998-3003 ◽  
Author(s):  
T. Tollersrud ◽  
K. Kenny ◽  
A. J. Reitz ◽  
J. C. Lee
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Rational Design ◽  
Capsular Polysaccharide ◽  
Bovine Mastitis ◽  
The United States ◽  
Economic Losses ◽  
Enzyme Linked Immunosorbent Assay ◽  
Capsule Production ◽  
Many Sources

Bovine mastitis caused by Staphylococcus aureus is responsible for major economic losses to the dairy industry, and more-effective therapeutic or preventive approaches are sorely needed. The predominance of staphylococcal capsular polysaccharide types 5 and 8 among human isolates from many sources is well documented, but there seems to be a greater variation in the distribution of capsular serotypes among isolates from cows. A total of 636 isolates of S. aureus from cases of bovine mastitis in Sweden, Denmark, Finland, Iceland, Ireland, and the United States were investigated for production of capsular polysaccharide types 5 and 8. Approximately half of all the European isolates tested were of serotype 8, although variation among countries and among isolates of clinical and subclinical origin was observed. Sweden had the highest frequency (87%) of serotypeable isolates, and Finland had the lowest (48%). Capsule types 5 and 8 accounted for only 42% of the U.S. isolates tested. A few isolates showed weak reactivity with CP5 antiserum in a colony blot assay, and an enzyme-linked immunosorbent assay inhibition method confirmed that the levels of capsule produced by these strains were <10% of those produced by control strains. Fifty isolates that failed to react with capsular antisera all possessed the genes for production of capsular polysaccharide type 5 or 8. These results underscore the variability in capsule production by bovine isolates ofS. aureus from different geographic regions. This information is important for the rational design of a capsule-based vaccine to prevent S. aureus bovine mastitis.

scholarly journals The Effectiveness of Contact Precautions on Methicillin-Resistant Staphylococcus aureus in Long-term Care Across the United States

2019 ◽  
Vol 71 (7) ◽  
pp. 1676-1683 ◽  
Author(s):  
Daniel J Morgan ◽  
Min Zhan ◽  
Michihiko Goto ◽  
Carrie Franciscus ◽  
Bruce Alexander ◽  
...  
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Long Term Care ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
The United States ◽  
Standard Precautions ◽  
Term Care ◽  
Contact Precautions ◽  
Care Facilities

Abstract Background Methicillin-resistant Staphylococcus aureus (MRSA) is a common cause of health care–associated infections in long-term care facilities (LTCFs). The Centers for Disease Control and Prevention recommends contact precautions for the prevention of MRSA within acute care facilities, which are being used within the United States Department of Veterans Affairs (VA) for LTCFs in a modified fashion. The impact of contact precautions in long-term care is unknown. Methods To evaluate whether contact precautions decreased MRSA acquisition in LTCFs, compared to standard precautions, we performed a retrospective effectiveness study (pre-post, with concurrent controls) using data from the VA health-care system from 1 January 2011 until 31 December 2015, 2 years before and after a 2013 policy recommending a more aggressive form of contact precautions. Results Across 75 414 patient admissions from 74 long-term care facilities in the United States, the overall unadjusted rate of MRSA acquisition was 2.6/1000 patient days. Patients were no more likely to acquire MRSA if they were cared for using standard precautions versus contact precautions in a multivariable, discrete time survival analysis, controlling for patient demographics, risk factors, and year of admission (odds ratio, 0.97; 95% confidence interval, .85–1.12; P = .71). Conclusions MRSA acquisition and infections were not impacted by the use of active surveillance and contact precautions in LTCFs in the VA.

scholarly journals Epidemics of Community-Associated Methicillin-Resistant Staphylococcus aureus in the United States: A Meta-Analysis

PLoS ONE ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. e52722 ◽  
Author(s):  
Vanja M. Dukic ◽  
Diane S. Lauderdale ◽  
Jocelyn Wilder ◽  
Robert S. Daum ◽  
Michael Z. David
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Meta Analysis ◽  
The United States ◽  
Methicillin Resistant

Activity of Oritavancin Against Gram-positive Pathogens Causing Bloodstream Infections in the United States Over 10 Years: Focus on Drug-Resistant Enterococcal Subsets (2010-2019)

2021 ◽  
Author(s):  
Cecilia G. Carvalhaes ◽  
Helio S. Sader ◽  
Jennifer M. Streit ◽  
Mariana Castanheira ◽  
Rodrigo E. Mendes
Keyword(s):  
United States ◽  
Staphylococcus Aureus ◽  
Enterococcus Faecium ◽  
Bloodstream Infections ◽  
The United States ◽  
Drug Resistant ◽  
Gram Positive ◽  
Methicillin Resistant ◽  
Vancomycin Resistant ◽  
Over Time

Oritavancin displayed potent and stable activity (MIC 90 range, 0.06-0.5 mg/L) over time (2010-2019) against Gram-positive pathogens causing bloodstream infections, including methicillin-resistant Staphylococcus aureus and resistant subsets of Enterococcus spp. Daptomycin and linezolid were also active against methicillin-resistant S. aureus and vancomycin-resistant Enterococcus . Only oritavancin and linezolid remained active against Enterococcus faecium isolates displaying an elevated daptomycin MIC (i.e., 2-4 mg/L). Proportions of methicillin-resistant S. aureus and vancomycin-resistant Enterococcus within the respective S. aureus and enterococcal populations decreased over this period.

scholarly journals Antimicrobial Susceptibility to Azithromycin among Salmonella enterica Isolates from the United States

2011 ◽  
Vol 55 (9) ◽  
pp. 3985-3989 ◽  
Author(s):  
Maria Sjölund-Karlsson ◽  
Kevin Joyce ◽  
Karen Blickenstaff ◽  
Takiyah Ball ◽  
Jovita Haro ◽  
...  
Keyword(s):  
United States ◽  
Antimicrobial Susceptibility ◽  
Salmonella Enterica ◽  
Antimicrobial Agents ◽  
The United States ◽  
Outcome Data ◽  
Content Type ◽  
Susceptibility Data ◽  
Retail Meat ◽  
Clinical Breakpoints

ABSTRACTDue to emerging resistance to traditional antimicrobial agents, such as ampicillin, trimethoprim-sulfamethoxazole, and chloramphenicol, azithromycin is increasingly used for the treatment of invasiveSalmonellainfections. In the present study, 696 isolates of non-TyphiSalmonellacollected from humans, food animals, and retail meats in the United States were investigated for antimicrobial susceptibility to azithromycin. Seventy-twoSalmonella entericaserotype Typhi isolates from humans were also tested. For each isolate, MICs of azithromycin and 15 other antimicrobial agents were determined by broth microdilution. Among the non-TyphiSalmonellaisolates, azithromycin MICs among human isolates ranged from 1 to 32 μg/ml, whereas the MICs among the animal and retail meat isolates ranged from 2 to 16 μg/ml and 4 to 16 μg/ml, respectively. AmongSalmonellaserotype Typhi isolates, the azithromycin MICs ranged from 4 to 16 μg/ml. The highest MIC observed in the present study was 32 μg/ml, and it was detected in three human isolates belonging to serotypes Kentucky, Montevideo, and Paratyphi A. Based on our findings, we propose an epidemiological cutoff value (ECOFF) for wild-typeSalmonellaof ≤16 μg/ml of azithromycin. The susceptibility data provided could be used in combination with clinical outcome data to determine tentative clinical breakpoints for azithromycin andSalmonella enterica.

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