ArticleAnimal microbiome2023
Persistent effects of intramammary ceftiofur treatment on the gut microbiome and antibiotic resistance in dairy cattle.
Article in Animal microbiome, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 14 citations in OpenAlex.
- Impact of ceftiofur administration andmSystems · 2026Article
- Bovine Mastitis Therapy at a Crossroads: Pharmacokinetic Barriers, Biofilms, Antimicrobial Resistance, and Emerging Solutions.Pharmaceuticals (Basel, Switzerland) · 2026Review
- Long-term effects of systemic ceftiofur and ampicillin on the abundance and duration of shedding of resistant Gram-negative bacteria in the feces of healthy dairy cows: a randomized clinical trial.Frontiers in veterinary science · 2026Article
- Microbiota-immune crosstalk in livestock: implications for tick-borne disease control.Frontiers in immunology · 2026Review
- Effects of Intra-uterine Ceftiofur on the Equine Uterine Microbiome.Veterinary sciences · 2025Article
- Comparative Effects of Intermittent vs. Constant Ceftiofur Hydrochloride Exposure onAntibiotics (Basel, Switzerland) · 2025Article
- Assessing the Impacts of Dairy Farm Antimicrobial Use on the Bovine Fecal Microbiome.Animals : an open access journal from MDPI · 2025Article
- Resistome and microbiome profiling of bovine milk following antimicrobial dry cow therapy: insights from short- and long-read metagenomic sequencing.Frontiers in microbiomes · 2025Article
- Effects of vaccination and interventions on nasal microbiome and BRD-associated pathogens in calves.Frontiers in microbiology · 2024Article
- Untargeted metabolomics and metagenomics reveal signatures for intramammary ceftiofur treatment and lactation stage in the cattle hindgut.Frontiers in molecular biosciences · 2024Article
- Recovery of the gut microbiome following enteric infection and persistence of antimicrobial resistance genes in specific microbial hosts.Scientific reports · 2023Article
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Authors and funding
11 authors at 3 institutions in 1 country.
Funding
Abstract
backgroundIntramammary (IMM) ceftiofur treatment is commonly used in dairy farms to prevent mastitis, though its impact on the cattle gut microbiome and selection of antibiotic-resistant bacteria has not been elucidated. Herein, we enrolled 40 dairy (Holstein) cows at the end of the lactation phase for dry-cow therapy: 20 were treated with IMM ceftiofur (Spectramast®DC) and a non-antibiotic internal teat sealant (bismuth subnitrate) and 20 (controls) received only bismuth subnitrate. Fecal grab samples were collected before and after treatment (weeks 1, 2, 3, 5, 7, and 9) for bacterial quantification and metagenomic next-generation sequencing.
resultsOverall, 90% and 24% of the 278 samples had Gram-negative bacteria with resistance to ampicillin and ceftiofur, respectively. Most of the cows treated with ceftiofur did not have an increase in the number of resistant bacteria; however, a subset (25%) shed higher levels of ceftiofur-resistant bacteria for up to 2 weeks post-treatment. At week 5, the antibiotic-treated cows had lower microbiota abundance and richness, whereas a greater abundance of genes encoding extended-spectrum β-lactamases (ESBLs), CfxA, ACI-1, and CMY, was observed at weeks 1, 5 and 9. Moreover, the contig and network analyses detected associations between β-lactam resistance genes and phages, mobile genetic elements, and specific genera. Commensal bacterial populations belonging to Bacteroidetes most commonly possessed ESBL genes followed by members of Enterobacteriaceae.
conclusionThis study highlights variable, persistent effects of IMM ceftiofur treatment on the gut microbiome and resistome in dairy cattle. Antibiotic-treated cattle had an increased abundance of specific taxa and genes encoding ESBL production that persisted for 9 weeks. Fecal shedding of ESBL-producing Enterobacteriaceae, which was classified as a serious public health threat, varied across animals. Together, these findings highlight the need for additional studies aimed at identifying factors associated with shedding levels and the dissemination and persistence of antibiotic resistance determinants on dairy farms across geographic locations.
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