D. B. Holman

Sequencing and Culture-based Characterization of the Vaginal and Uterine Microbiota in Beef Cattle that Became Pregnant or Non-pregnant via Artificial Insemination

This study characterizes the vaginal and uterine microbiota in beef cattle that became pregnant or non-pregnant via AI, identifying microbial signatures associated with pregnancy and antimicrobial resistance profiles.

The gut microbiome and resistome of conventionally- vs. pasture-raised pigs

This study compares the gut microbiomes and resistomes of conventionally-raised and pasture-raised pigs, finding significant differences in microbial composition, antimicrobial resistance genes, and functional profiles.

Whole-body Microbiota of Newborn Calves and Their Response to Prenatal Vitamin and Mineral Supplementation

This study examines how prenatal vitamin and mineral supplementation affects microbial colonization in seven anatomical sites of newborn calves and their blood cytokines.

Novel insights into the pig gut microbiome using metagenome-assembled genomes

This paper analyzes the pig gut microbiome using metagenome-assembled genomes (MAGs) to identify changes in microbial composition and function across age and weaning.

Characterization of the microbiota associated with 12-week-old bovine fetuses exposed to divergent in utero nutrition

This study characterizes the microbiota in 12-week-old bovine fetuses and finds that maternal nutrition influences early fetal microbial communities.

The nasopharyngeal, ruminal, and vaginal microbiota and the core taxa shared across these microbiomes in virgin yearling heifers exposed to divergent in utero nutrition during their first trimester of gestation and in pregnant beef heifers in response to mineral supplementation

This study examines the microbiota of nasopharyngeal, ruminal, and vaginal samples in beef heifers exposed to different in utero nutrition and mineral supplementation, finding little impact on microbiome diversity and identifying shared microbial taxa across body sites.

A Longitudinal Study of Antimicrobial Resistance in Enterococcus spp. Isolated from a Beef Processing Plant and Retail Ground Beef

This study tracks antimicrobial resistance in Enterococcus spp. from a beef plant and retail ground beef over 19 months, identifying resistance profiles and genetic similarities between isolates.

Weaning age and its effect on the development of the swine gut microbiome and resistome

This study examines how weaning age affects the gut microbiome and resistome development in pigs, finding that microbial diversity increases post-weaning and resistance genes to most antimicrobials decrease, except for tetracyclines and macrolides-lincosamides-streptogramin B.