Toxic Plant Interactions in Livestock Systems

Toxic plant interactions pose a persistent challenge to livestock production worldwide, manifesting in acute poisonings, chronic disorders and reproductive failures. Plants synthesise a diverse array of secondary metabolites—such as alkaloids, glycosides, cyanogenic glucosides and fluoroacetate—which disrupt physiological processes in ruminants and monogastric species. Clinical presentations range from sudden cardiac collapse and neurological signs to photosensitisation and teratogenic effects, undermining animal welfare and incurring substantial economic losses. Environmental factors—including drought, land degradation and encroachment of invasive toxic flora—can exacerbate risk by reducing available forage diversity and increasing inadvertent ingestion. Integrated management strategies now encompass targeted pasture monitoring, selective breeding for resistance, induced aversion techniques and advanced microbial interventions to detoxify compounds in the rumen. Such approaches seek not only to mitigate acute outbreaks but also to safeguard reproductive performance and meat or milk quality, underscoring the global importance of understanding plant–livestock toxicodynamics.

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Toxic Plant Interactions in Livestock Systems publication trend

The graph below shows the total number of articles in toxic plant interactions in livestock systems across all publications each year (not limited to Nature Index journals).

Technical terms

Sodium monofluoroacetate: A plant-derived toxin that inhibits aconitase in the Krebs cycle, causing acute energy deficiency, cardiotoxicity and renal tubular degeneration.

Photosensitisation: A condition in which accumulation of photodynamic agents in the skin leads to light-induced dermatitis following hepatic or biliary dysfunction.

Teratogen: An agent that disrupts normal embryonic development, causing congenital malformations or fetal loss.

Conditioned food aversion: A behavioural technique that pairs non-lethal exposure to a toxic plant with gastrointestinal discomfort, teaching animals to avoid the species in future.

Rumen detoxification: The metabolic transformation of plant toxins by microbial populations in the rumen, potentially enhanced through introduction of specialised or genetically modified bacteria.

References

1. Intoxicação experimental por monofluoroacetato de sódio em bovinos: aspectos clínicos e patológicos. Pesquisa Veterinária Brasileira (2010).
2. Protective effect of acetamide in cattle indicates that monofluoroacetate is the toxic principle of Palicourea marcgravii (Rubiaceae). Pesquisa Veterinária Brasileira (2012).
3. Avaliações clínico-patológicas e laboratoriais da intoxicação experimental por monofluoroacetato de sódio em ovinos. Pesquisa Veterinária Brasileira (2010).
4. Comparison of the sensibility of cattle and buffaloes to poisoning by Palicourea marcgravii (Rubiaceae). Pesquisa Veterinária Brasileira (2003).
5. Congenital malformations and abortions induced experimentally by the ingestion of Poincianella pyramidalis (Tul.) L.P. Queiroz (catingueira) in sheep. Pesquisa Veterinária Brasileira (2017).
6. Embryonic mortality and abortion in goats caused by ingestion of Poincianella pyramidalis. Pesquisa Veterinária Brasileira (2018).