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Effects of Zinc and Menthol-Based Diets on Co-Selection of Antibiotic Resistance among E. coli and Enterococcus spp. in Beef Cattle.
Murray, Sarah A; Amachawadi, Raghavendra G; Norman, Keri N; Lawhon, Sara D; Nagaraja, Tiruvoor G; Drouillard, James S; Scott, Harvey M.
Afiliación
  • Murray SA; Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA.
  • Amachawadi RG; Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506, USA.
  • Norman KN; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA.
  • Lawhon SD; Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA.
  • Nagaraja TG; Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS 66506, USA.
  • Drouillard JS; Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS 66506, USA.
  • Scott HM; Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA.
Animals (Basel) ; 11(2)2021 Jan 21.
Article en En | MEDLINE | ID: mdl-33494214
Antibiotic resistance represents a growing crisis in both human and veterinary medicine. We evaluated the use of antibiotic alternatives-heavy metals and essential oils-in beef cattle feeding, and their effects on Gram-negative and Gram-positive bacteria. In this randomized controlled field trial, we measured the impact of supplemental zinc and menthol on antibiotic resistance among commensal enteric bacteria of feeder cattle. Fecal suspensions were plated onto plain- and antibiotic-supplemented MacConkey and m-Enterococcus agar for quantification of total and antibiotic-resistant Escherichia coli and Enterococcus spp., respectively. Temporal effects on overall E. coli growth were significant (p < 0.05), and menthol was associated with decreased growth on tetracycline-supplemented agar. Zinc was associated with significant increases in growth on erythromycin-supplemented m-Enterococcus agar. Cattle fed zinc exhibited significantly higher levels of macrolide resistance among fecal enterococci isolates.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Clinical_trials Idioma: En Revista: Animals (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Clinical_trials Idioma: En Revista: Animals (Basel) Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Suiza