Characterization of Acquired Antimicrobial Resistance Genes in Environmental Stenotrophomonas maltophilia Isolates from Brazil

2019 ◽  
Vol 25 (4) ◽  
pp. 475-479 ◽  
Author(s):  
João Pedro Rueda Furlan ◽  
Danilo Garcia Sanchez ◽  
Inara Fernanda Lage Gallo ◽  
Eliana Guedes Stehling
Keyword(s):  
Antimicrobial Resistance ◽  
Resistance Genes ◽  
Stenotrophomonas Maltophilia ◽  
Antimicrobial Resistance Genes

Characterization of antimicrobial resistance genes in Enterobacteriaceae carried by suburban mesocarnivores and locally owned and stray dogs

2020 ◽  
Vol 67 (4) ◽  
pp. 460-466
Author(s):  
Katherine E. L. Worsley‐Tonks ◽  
Elizabeth A. Miller ◽  
Stanley D. Gehrt ◽  
Shane C. McKenzie ◽  
Dominic A. Travis ◽  
...  
Keyword(s):  
Antimicrobial Resistance ◽  
Resistance Genes ◽  
Stray Dogs ◽  
Antimicrobial Resistance Genes

scholarly journals Genotypic antimicrobial resistance characterization of E. coli from dairy calves at high risk of respiratory disease administered enrofloxacin or tulathromycin

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
R. V. Pereira ◽  
C. Foditsch ◽  
J. D. Siler ◽  
S. C. Dulièpre ◽  
C. Altier ◽  
...  
Keyword(s):  
High Risk ◽  
Antimicrobial Resistance ◽  
Respiratory Disease ◽  
Resistance Genes ◽  
Tetracycline Resistance ◽  
Control Group ◽  
E Coli ◽  
Tetracycline Resistance Genes ◽  
Antimicrobial Resistance Genes

Abstract The objective of this study was to evaluate the longitudinal effect of enrofloxacin or tulathromycin use in calves at high risk of bovine respiratory disease (BRD) on antimicrobial resistance genes and mutation in quinolone resistance-determining regions (QRDR) in fecal E. coli. Calves at high risk of developing BRD were randomly enrolled in one of three groups receiving: (1) enrofloxacin (ENR; n = 22); (2) tulathromycin (TUL; n = 24); or (3) no treatment (CTL; n = 21). Fecal samples were collected at enrollment and at 7, 28, and 56 days after beginning treatment, cultured for Escherichiacoli (EC) and DNA extracted. Isolates were screened for cephalosporin, quinolone and tetracycline resistance genes using PCR. QRDR screening was conducted using Sanger sequencing. The only resistance genes detected were aac(6′)Ib-cr (n = 13), bla-CTX-M (n = 51), bla-TEM (n = 117), tetA (n = 142) and tetB (n = 101). A significantly higher detection of gyrA mutated at position 248 at time points 7 (OR = 11.5; P value = 0.03) and 28 (OR = 9.0; P value = 0.05) was observed in the ENR group when compared to calves in the control group. Our findings support a better understanding of the potential impacts from the use of enrofloxacin in calves on the selection and persistence of resistance.

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