Maria Dolores Crespo

Works (4)

Updated: July 5th, 2023 15:45

2016 journal article

Identification of a Campylobacter coli methyltransferase targeting adenines at GATC sites

FEMS Microbiology Letters, 364(7).

By: V. Dutta n, E. Altermann *, M. Crespo n, J. Olson n, R. Siletzky n & S. Kathariou n

MeSH headings : Adenine / metabolism; Animals; Campylobacter coli / enzymology; Campylobacter coli / genetics; Cattle; DNA Methylation; Genome, Bacterial; Humans; Methyltransferases / genetics; Methyltransferases / isolation & purification; Methyltransferases / metabolism; Nucleotide Motifs; Open Reading Frames; Sequence Analysis / methods
TL;DR: To determine whether ORF0059 mediated MboI resistance and hence encoded a putative N6‐adenine DNA methyltransferase, the gene was cloned immediately upstream of a chloramphenicol resistance cassette (cat) and a PCR fragment harboring ORF 0059‐cat was transformed into C. coli 11601, suggesting a direct role of this gene in methylation of adenines at GATC sites. (via Semantic Scholar)
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Added: August 6, 2018

2016 journal article

Novel plasmid conferring kanamycin and tetracycline resistance in the turkey-derived Campylobacter jejuni strain 11601MD

PLASMID, 86, 32–37.

By: M. Crespo n, E. Altermann *, J. Olson n, W. Miller *, K. Chandrashekhar  n & S. Kathariou n

author keywords: Campylobacter; C. jejuni; Plasmid; Antibiotic resistance; tet(O); Tetracycline resistance; Kanamycin resistance; aphA-3
MeSH headings : Animals; Anti-Bacterial Agents / pharmacology; Bacterial Proteins / genetics; Base Composition; Base Sequence; Campylobacter jejuni / drug effects; Campylobacter jejuni / genetics; Campylobacter jejuni / isolation & purification; Carrier Proteins / genetics; Conjugation, Genetic / genetics; DNA, Bacterial / genetics; Jejunum / microbiology; Kanamycin / pharmacology; Kanamycin Kinase / genetics; Microbial Sensitivity Tests; North Carolina; Plasmids / genetics; Poultry Diseases / microbiology; Sequence Analysis, DNA; Tetracycline / pharmacology; Tetracycline Resistance / genetics; Turkeys / microbiology
TL;DR: A novel plasmid harboring tet(O) was identified in C. jejuni strain 11601MD, which was isolated from the jejunum of a turkey produced conventionally in North Carolina, and will contribute to a better understanding of the distribution of potentially self-mobilizing plasmids harboring antibiotic resistance determinants in Campylobacter spp. (via Semantic Scholar)
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Added: August 6, 2018

2016 journal article

Routes of transmission of Salmonella and Campylobacter in breeder turkeys

JOURNAL OF APPLIED POULTRY RESEARCH, 25(4), 591–609.

By: M. Crespo n, S. Kathariou n, J. Grimes n, N. Cox *, R. Buhr *, J. Frye *, W. Miller *, C. Jackson *, D. Smith n

author keywords: Salmonella; Campylobacter; breeder turkeys; routes of transmission
TL;DR: Monitoring of turkey breeder hens and toms from d of hatch to 65 wk of age showed that Campylobacter spread rapidly and cross-contaminated turkeys throughout the growout house, confirming the importance of proper pest control and biosecurity to reduce the spread of the bacteria. (via Semantic Scholar)
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2012 journal article

Chromosomal tet(O)-Harboring Regions in Campylobacter coli Isolates from Turkeys and Swine

APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 78(23), 8488–8491.

By: M. Crespo n, J. Olson n, E. Altermann  n, R. Siletzky n & S. Kathariou n

MeSH headings : Animals; Campylobacter Infections / microbiology; Campylobacter Infections / veterinary; Campylobacter coli / drug effects; Campylobacter coli / genetics; Campylobacter coli / isolation & purification; Carrier Proteins / genetics; Chromosomes, Bacterial; DNA Transposable Elements; DNA, Bacterial / chemistry; DNA, Bacterial / genetics; Genes, Bacterial; Molecular Sequence Data; Mutagenesis, Insertional; Poultry Diseases / microbiology; Sequence Analysis, DNA; Swine; Swine Diseases / microbiology; Tetracycline Resistance; Turkeys
TL;DR: In turkey-derived Campylobacter coli isolates of a unique lineage (cluster II), the tetracycline resistance determinant tet(O) was chromosomal and was part of a gene cassette (transposon) interrupting a Campyloblacter jejuni-associated putative citrate transporter gene. (via Semantic Scholar)
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