scholarly journals Seasonal variation of macrolide resistance gene abundances in the South Fork Iowa River Watershed

2018 ◽  
Vol 610-611 ◽  
pp. 1173-1179 ◽  
Author(s):  
Elizabeth Luby Rieke ◽  
Thomas B. Moorman ◽  
Elizabeth L. Douglass ◽  
Michelle L. Soupir
Keyword(s):  
Seasonal Variation ◽  
Resistance Gene ◽  
Macrolide Resistance ◽  
South Fork ◽  
The South ◽  
River Watershed ◽  
Macrolide Resistance Gene

scholarly journals Disruption of an Enterococcus faecium Species-Specific Gene, a Homologue of Acquired Macrolide Resistance Genes of Staphylococci, Is Associated with an Increase in Macrolide Susceptibility

2001 ◽  
Vol 45 (1) ◽  
pp. 263-266 ◽  
Author(s):  
Kavindra V. Singh ◽  
Kumthorn Malathum ◽  
Barbara E. Murray
Keyword(s):  
Resistance Gene ◽  
Resistance Genes ◽  
Enterococcus Faecium ◽  
Complete Sequence ◽  
Macrolide Resistance ◽  
Specific Gene ◽  
Intrinsic Resistance ◽  
Macrolide Resistance Gene ◽  
Species Specific

ABSTRACT The complete sequence (1,479 nucleotides) of msrC, part of which was recently reported by others using a different strain, was determined. This gene was found in 233 of 233 isolates ofEnterococcus faecium but in none of 265 other enterococci. Disruption of msrC was associated with a two- to eightfold decrease in MICs of erythromycin azithromycin, tylosin, and quinupristin, suggesting that it may explain in part the apparent greater intrinsic resistance to macrolides of isolates of E. faecium relative to many streptococci. This endogenous, species-specific gene of E. faecium is 53% identical tomsr(A), suggesting that it may be a remote progenitor of the acquired macrolide resistance gene found in some isolates of staphylococci.

scholarly journals Prevalence and Molecular Genetics of Macrolide Resistance among Streptococcus pneumoniae Isolates Collected in Finland in 2002

2005 ◽  
Vol 49 (10) ◽  
pp. 4180-4184 ◽  
Author(s):  
M. Rantala ◽  
S. Huikko ◽  
P. Huovinen ◽  
J. Jalava
Keyword(s):  
Streptococcus Pneumoniae ◽  
Resistance Gene ◽  
Molecular Genetics ◽  
Macrolide Resistance ◽  
Major Group ◽  
Minor Population ◽  
Macrolide Resistance Gene ◽  
A Minor

ABSTRACT The prevalence and mechanisms of macrolide resistance among 1,007 clinical pneumococcal isolates collected in Finland were investigated. Of these, 217 (21.5%) were resistant to erythromycin and 11% to clindamycin. Among the erythromycin-resistant isolates, mef(E) was present in 95 isolates (44%), mef(A) was present in 12 isolates (6%), and erm(B) was present in 90 isolates (41%). A double mechanism, mef(E) and erm(B), was detected in five isolates (2%). Ribosomal mutation was detected in 14 (6%) macrolide-resistant isolates in which no other determinant was found. Based on the telithromycin MICs, two groups of isolates were formed: 83.3% of the isolates belonged to a major group for which the telithromycin MIC range was ≤0.008 to 0.063 μg/ml, and 16.7% belonged to a minor group for which the telithromycin MIC range was 0.125 to 8 μg/ml. All except three isolates in the minor population carried a macrolide resistance gene.

Linking Habitat Quality with Trophic Performance of Steelhead along Forest Gradients in the South Fork Trinity River Watershed, California

2009 ◽  
Vol 138 (3) ◽  
pp. 506-521 ◽  
Author(s):  
Sarah G. McCarthy ◽  
Jeffrey J. Duda ◽  
John M. Emlen ◽  
Garth R. Hodgson ◽  
David A. Beauchamp
Keyword(s):  
Habitat Quality ◽  
South Fork ◽  
The South ◽  
River Watershed ◽  
Trinity River

scholarly journals Temporal trends in amount and placement of conservation practices in the South Fork of the Iowa River watershed

2020 ◽  
Vol 75 (3) ◽  
pp. 245-253
Author(s):  
T.B. Moorman ◽  
D.E. James ◽  
J. Van Horn ◽  
S.A. Porter ◽  
M.D. Tomer
Keyword(s):  
Temporal Trends ◽  
Conservation Practices ◽  
South Fork ◽  
The South ◽  
River Watershed
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