by Maria Gallegos
Antibiotic use in animals and crops has yielded multi-drug
resistance causing concern due to lack of efficient treatments in the
future. Agricultural use of streptomycin
in apple and pear orchards in order to combat fire blight lead to a study
examining the levels of resistance that developed in Escherichia coli and
Staphylococcus species found in intestinal and nasal cavities of
sheep. Findings demonstrated an increase
in antibiotic multi-resistance particularly in Escherichia coli of sheep
grazing in orchards exposed to streptomycin.
Fig 1. Streptomycin-resistant E. coli isolated from
sheep. Graph shows a three month
multi-drug resistance analysis of control and test group sheep concerning E.
coli.
Human use of antibiotics in the future requires
careful consideration. This is the first known study conducted in sheep
concerning this topic however certainly not the only species with this dilemma.
Original article by: Scherer A, Vogt H, Vilei E, Frey J, Perreten V.
(2013). Enhanced antibiotic multi-resistance in nasal and faecal bacteria after
agricultural use of streptomycin. Environmental Microbiology. 15(1), 297–304.
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