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Zoonotic transmission of asymptomatic carriage on dairy farms in Canterbury, New Zealand. | LitMetric

AI Article Synopsis

  • Zoonotic pathogens, facilitated by agricultural intensification, are raising global health concerns, particularly regarding interactions between humans, livestock, and wildlife.
  • The study focused on the transmission of a specific pathogen causing mastitis in dairy cows and affecting humans, investigating samples from dairy farms and a primary school in New Zealand.
  • Results revealed 13 transmission clusters, mostly within species, but identified one potential zoonotic transmission cluster, along with low antimicrobial resistance but a concerning gene detected in a bovine isolate.

Article Abstract

Zoonotic pathogen transmission is of growing concern globally, with agricultural intensification facilitating interactions between humans, livestock and wild animals. is a major human pathogen, but it also causes mastitis in dairy cattle, leading to an economic burden on the dairy industry. Here, we investigated transmission within and between cattle and humans, including potential zoonotic transmission of isolated from cattle and humans from three dairy farms and an associated primary school in New Zealand. Nasal swabs (=170) were taken from healthy humans. Inguinal and combined nasal/inguinal swabs were taken from healthy cattle (=1163). Whole-genome sequencing was performed for 96 . isolates (44 human and 52 cattle). Multilocus sequence typing and assessments of antimicrobial resistance and virulence were carried out. Potential within- and across-species transmission events were determined based on single nucleotide polymorphisms (SNPs). Thirteen potential transmission clusters were detected, with 12 clusters restricted to within-species and one potential zoonotic transmission cluster (ST5). Potential transmission among cattle was mostly limited to single age groups, likely because different age groups are managed separately on farms. While the prevalence of antimicrobial resistance (AMR) was low among both bovine and human isolates, the discovery of an extended-spectrum beta-lactamase gene ( ) in a bovine isolate was concerning. This study provides evidence around frequency and patterns of potential transmission of on dairy farms and highlights the AMR and virulence profile of asymptomatic carriage isolates.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11616781PMC
http://dx.doi.org/10.1099/mgen.0.001318DOI Listing

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