Influence of the microbiota-gut-brain axis on behavior and welfare in farm animals: A review

Kraimi, Narjis; Dawkins, Marian; Gebhardt-Henrich, Sabine G.; Velge, Philippe; Rychlik, Ivan; Volf, Jiří; Creach, Pauline; Smith, Adrian; Colles, Frances; Leterrier, Christine (2019). Influence of the microbiota-gut-brain axis on behavior and welfare in farm animals: A review. Physiology & behavior, 210, p. 112658. Elsevier 10.1016/j.physbeh.2019.112658

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There is increasing evidence of a pivotal role of the gut microbiota (GUT-M) in key physiological functions in vertebrates. Many studies discuss functional implications of the GUT-M not only on immunity, growth, metabolism, but also on brain development and behavior. However, while the influence of the microbiota-gut-brain axis (MGBA) on behavior is documented in rodents and humans, data on farm animals are scarce. This review will first report the well-known influence of the MGBA on behavior in rodent and human and then describe its influence on emotion, memory, social and feeding behaviors in farm animals. This corpus of experiments suggests that a better understanding of the effects of the MGBA on behavior could have large implications in various fields of animal production. Specifically, animal welfare and health could be improved by selection, nutrition and management processes that take into account the role of the GUT-M in behavior.

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