Intoxicação espontânea por Brachiaria híbrida cv mulato I em ovinos e caprinos e experimental por Brachiaria híbrida cv mulato II em ovinos

Ogliari, Daiane; Molossi, Franciéli Adriane; Savaris, Thaiza; Wicpolt, Nathalia S.; Zancan, Ildo; Gava, Aldo

doi:10.1590/1678-5150-pvb-4747

Cited by 3 publications

(6 citation statements)

References 10 publications

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“…3 Similar lesions were described in cattle, 27 sheep, 1 goats, 35 and buffaloes 16 grazing Panicum miliaceum , Urochloa decumbens , Urochloa brizantha , Urochloa humidicola , or Urochloa ruziziensis . In goats 12 and sheep, 30 similar lesions were described in animals spontaneously intoxicated with Urochloa hybrid Mulato I ( U. ruziziensis × U. brizantha ).…”

supporting

confidence: 56%

“…In the only experimental study feeding adult sheep with U. hybrid Mulatto II, no clinical, hematologic, or pathologic changes were observed. 30 After searching PubMed, CAB, and Google Scholar, we could not find reports of any toxic event associated with the consumption of Urochloa hybrid Mulato II. We describe here an outbreak of intoxication in sheep grazing Urochloa hybrid Mulato II, with special emphasis on the hepatic and renal lesions.…”

mentioning

confidence: 99%

“…Our findings differ from those obtained in the only report we could find of adult sheep fed Urochloa hybrid Mula-tto II experimentally, in which no clinical, hematologic, or histopathologic changes were observed. 30 The reason for this difference in outcome was not determined. The toxicity of Urochloa spp.…”

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confidence: 99%

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Hepatic and renal lesions in sheep intoxicated with Urochloa hybrid Mulato II in Argentina

Marin,

Gimeno,

Riet-Correa

et al. 2024

J VET Diagn Invest

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A flock of 48 sheep in Argentina grazing on a pasture of hybrid Urochloa (formerly Brachiaria) Mulato II ( Urochloa ruziziensis × Urochloa decumbens × Urochloa brizantha) developed facial dermatitis, severe jaundice, and weakness after brief physical activity. Blood biochemistry of 3 animals revealed azotemia, elevated aspartate aminotransferase activity, and increased direct, indirect, and total bilirubin concentrations. The urine was markedly turbid and contained large concentrations of bile pigments and protein. At autopsy of 2 animals, there was severe jaundice and subcutaneous submandibular edema. The livers were enlarged, intensely yellow, and had a marked acinar pattern. Gallbladders were distended, and the kidneys were diffusely dark in one animal and yellow-green in the other. Microscopically, there was lymphoplasmacytic and histiocytic cholangiohepatitis with abundant crystals in the lumen of bile ducts and in the cytoplasm of macrophages. The proximal and distal convoluted renal tubules had protein casts in their lumens, and crystals were observed in the lumen and epithelial cells. Lectin histochemistry showed strong affinity for Arachis hypogaea agglutinin in hepatic macrophages. In the one sheep that was tested for heavy metals, copper concentrations in the liver and kidney were within the RIs. Despite the immediate change of pasture, morbidity and mortality were 100% within 3 mo. The association between the consumption of this pasture, and the clinical, biochemical, pathology, and lectin histochemistry findings confirmed intoxication with Urochloa hybrid Mulato II. To our knowledge, intoxication by this hybrid of Urochloa has not been reported previously.

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confidence: 56%

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confidence: 99%

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Hepatic and renal lesions in sheep intoxicated with Urochloa hybrid Mulato II in Argentina

Marin,

Gimeno,

Riet-Correa

et al. 2024

J VET Diagn Invest

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“…The frequent introduction of naive animals from the semiarid region of Pernambuco (Costa et al 2011, Faccin et al 2014, Nascimento et al 2018. It is also important to remember that sheep are more sensible to poisonings by saponins contained in B. decumbens (Lemos et al 1996, Macedo et al 2008, Ogliari et al 2018.…”

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confidence: 99%

Poisonous plants for ruminants in the dairy region of Pernambuco, Northeastern Brazil

et al. 2021

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A survey carried out in the dairy region of Pernambuco was conducted to determine the most important poisonous plants for ruminants in the region. A total of 95 farmers from 19 municipalities were interviewed and the grazing areas of ruminants were inspected. According to the survey, the most important poisonous plants for ruminants were Manihot esculenta, Palicourea aeneofusca, Brachiaria decumbens, Indigofera suffruticosa, Ricinus communis and Cestrum axillare. Less reported classes of poisonous plants included nephrotoxic plants and plants that cause abortions or congenic malformations. Psychotria hoffmannseggiana, Psychotria colorata and Psychotria capitata were reported by farmers as the cause of sudden death in cattle. These plants should be better investigated to evaluate their importance as the cause of cattle deaths.

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“…Although various studies demonstrate that several species of Brachiaria induce poisoning, in some outbreaks, the sum of the ingestion of different species of Brachiaria spp. is responsible for the poisoning (Souza et al 2010, Ogliari et al 2018. In those instances, the protodioscin concentrations were not determined (Lemos et al 1996, Caicedo et al 2012, Rosa et al 2016, Utiumi et al 2018, and even when they were, each plant species was not analyzed separately (Mustafa et al 2012, Diamantino et al 2018, 2019a, 2019b.…”

Section: Introductionmentioning

confidence: 99%

Protodioscin levels in Brachiaria spp. in a sheep production system and a brief review of the literature of Brachiaria spp. poisoning in ruminants

et al. 2021

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Plants of the genus Brachiaria, used in several countries as forage, are poisonous to some livestock species. Their toxic principle is protodioscin, and the main form of clinical presentation of the toxicosis is hepatogenous photosensitization. Here we compare protodioscin levels in B. decumbens and B. brizantha and review the literature on the concentrations and methodologies of collection and analysis of the toxic principle in Brachiaria spp. and the risk of contamination of pastures by more toxic species that may facilitate poisoning by plants of this genus in sheep. The experiment was conducted in pastures originally formed by B. brizantha, with many B. decumbens invasion points. The occurrence of cases of poisoning by Brachiaria spp. was the criterion for confirming pasture toxicity. The forage samples were collected at ten random points every 28 days through manual grazing simulation. The samples were analyzed for protodioscin by high-performance liquid chromatography (HPLC) with light scattering by evaporation (ELSD) after being dried and crushed. In the flock of 69 sheep, five poisoning cases occurred, three sheep died, and two recovered. The protodioscin levels found in the evaluated pastures ranged from 0.70 to 0.45%; higher levels appeared in B. decumbens (7.09%) compared to 1.04% in B. brizantha. We suggest that Brachiaria spp. should be avoided in pastures where sheep are grazing.

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Intoxicação espontânea por Brachiaria híbrida cv mulato I em ovinos e caprinos e experimental por Brachiaria híbrida cv mulato II em ovinos

Cited by 3 publications

References 10 publications

Hepatic and renal lesions in sheep intoxicated with Urochloa hybrid Mulato II in Argentina

Hepatic and renal lesions in sheep intoxicated with Urochloa hybrid Mulato II in Argentina

Poisonous plants for ruminants in the dairy region of Pernambuco, Northeastern Brazil

Protodioscin levels in Brachiaria spp. in a sheep production system and a brief review of the literature of Brachiaria spp. poisoning in ruminants

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