REVIEW PAPER
Zoonotic bacteria in the vicinity of animal farms as a factor disturbing the human microbiome: a review
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1
Nofer Institute of Occupational Medicine, Łódź, Poland
(Department of Chemical Safety, Biological Safety Unit)
2
Nofer Institute of Occupational Medicine, Łódź, Poland
(Department of Chemical Safety)
Online publication date: 2024-04-04
Corresponding author
Anna Kozajda
Nofer Institute of Occupational Medicine, Department of Chemical Safety, Biological Safety Unit, św. Teresy 8, 91-348 Łódź, Poland
Int J Occup Med Environ Health. 2024;37(2):138-52
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ABSTRACT
This review is aimed at summarizing the current state of knowledge about the relationship between environmental exposure to the bioaerosol
emitted by intensive livestock farming and changes in the microbiome of people living in livestock farm vicinity. The PubMed, Scopus and Web of
Science databases were searched by crossing keywords from the following 3 groups: a) “livestock,” “animal farms,” “animal breeding”; b) “microbiome,”
“resistome”; c) “livestock vicinity,” “farm vicinity,” “neighborhoods and health” in 2010–2022. Literature screening did not reveal any paper
related to the full microbiome composition in the population studied. In the study, the authors included 7 papers (5 from the Netherlands, 1 from the
USA, and 1 from China). The studies confirmed the carriage of Staphylococcus aureus, including methicillin-resistant S. aureus (MRSA), livestockassociated
MRSA (LA-MRSA MC398) and multidrug-resistant S. aureus (MDRSA) in the nasal microbiome of adults and children living within
500–2000 m from a livestock farm. Clostridium difficile, including LA-ribotype RT078 carriage, was detected in the intestinal microbiome of adults
living within 500–1000 m. Extended-spectrum β-lactamase (ESBL) producing Enterobacteriaceae were confirmed in the intestinal microbiome of
adults living within 500–6200 m. Knowledge on the composition of the microflora of people living in livestock farm vicinity is insufficient to conclude
about changes in the microbiome caused by the environmental emission of bioaerosol. The carriage prevalence of the LA-bacteria, including
both strains with antimicrobial resistance and antimicrobial resistance genes, confirms the presence of zoonotic bacteria in the human microflora
in populations without occupational contact with animals. It cannot be ruled out that zoonotic bacteria, as a component of the microbiome, have
a negative impact on people’s health. Int J Occup Med Environ Health. 2024;37(2):138–52