Abstract
ABSTRACT The objective of the research was to quantify three antibiotic resistance genes (tetQ, cfxA and mefA) in the faeces of dairy cows following therapeutic and prophylactic antibiotic treatments. Manure collected from dairy cows treated with either no antibiotic, pirlimycin hydrochloride (PIRL), ceftiofur crystalline free acid (CCFA) or cephapirin benzathine (CEPH) were submitted to quantitative PCR analysis. No treatment effects on the abundance of the tetQ and cfxA were observed. There was a trend for the abundance of the mefA to be increased in cows treated with PIRL (P = 0.07). Overall, the results showed no difference of measured three ARGs from cows receiving different antibiotics. Considering the limited scope of our investigation, further investigation is needed to provide more information on ARGs excretion from cows that received therapeutic and prophylactic antibiotic treatment.
Highlights
The objective of the research was to quantify three antibiotic resistance genes in the faeces of dairy cows following therapeutic and prophylactic antibiotic treatments
An example would be methicillin-resistant Staphylococcus aureus (MRSA) that is resistant to methicillin, amoxicillin, penicillin, oxacillin and other common antibiotics known as cephalosporins
In Germany, it was found that at least 10% of sporadic infections of healthcare-associated (HA)-MRSA and community-associated (CA)-MRSA is due to livestock-associated MRSA (LA)-MRSA, which is initially associated with livestock (Cuny et al 2015)
Summary
Knowltonb aSchool of Life Science and Engineering, Foshan University, Foshan, People’s Republic of China; bDepartment of Dairy Science, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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