Characterization of tet(Y)-carrying LowGC plasmids exogenously captured from cow manure at a conventional dairy farm
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
27083193
DOI
10.1093/femsec/fiw075
PII: fiw075
Knihovny.cz E-resources
- Keywords
- Acinetobacter, LowGC plasmids, cattle manure, horizontal gene transfer, tet(Y), tetracycline resistance,
- MeSH
- Acinetobacter drug effects genetics MeSH
- Anti-Bacterial Agents pharmacology MeSH
- Chlortetracycline pharmacology MeSH
- Farms MeSH
- Manure analysis MeSH
- Chromosome Mapping MeSH
- Plasmids genetics MeSH
- Swine MeSH
- Soil MeSH
- Soil Microbiology MeSH
- Tetracycline Resistance genetics MeSH
- Base Sequence genetics MeSH
- Sequence Analysis, DNA MeSH
- Cattle MeSH
- Streptomycin pharmacology MeSH
- Base Composition genetics MeSH
- Agriculture MeSH
- Animals MeSH
- Check Tag
- Cattle MeSH
- Female MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Anti-Bacterial Agents MeSH
- Chlortetracycline MeSH
- Manure MeSH
- Soil MeSH
- Streptomycin MeSH
Manure from dairy farms has been shown to contain diverse tetracycline resistance genes that are transferable to soil. Here, we focus on conjugative plasmids that may spread tetracycline resistance at a conventional dairy farm. We performed exogenous plasmid isolation from cattle feces using chlortetracycline for transconjugant selection. The transconjugants obtained harbored LowGC-type plasmids and tet(Y). A representative plasmid (pFK2-7) was fully sequenced and this was compared with previously described LowGC plasmids from piggery manure-treated soil and a GenBank record from Acinetobacter nosocomialis that we also identified as a LowGC plasmid. The pFK2-7 plasmid had the conservative backbone typical of LowGC plasmids, though this region was interrupted with an insert containing the tet(Y)-tet(R) tetracycline resistance genes and the strA-strB streptomycin resistance genes. Despite Acinetobacter populations being considered natural hosts of LowGC plasmids, these plasmids were not found in three Acinetobacter isolates from the study farm. The isolates harbored tet(Y)-tet(R) genes in identical genetic surroundings as pFK2-7, however, suggesting genetic exchange between Acinetobacter and LowGC plasmids. Abundance of LowGC plasmids and tet(Y) was correlated in manure and soil samples from the farm, indicating that LowGC plasmids may be involved in the spread of tet(Y) in the environment.
References provided by Crossref.org
