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1.
Vet Res Commun ; 48(3): 1831-1835, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38267711

RESUMO

This paper aims to describe a case of trombiculosis in llamas from the Puna region of Argentina caused by Eutrombicula cochinocaensis. Trombiculosis is a parasitic infestation caused by the larval form of trombiculid mites, commonly known as chigger mites. Six adult llamas out of eighteen (33%) were infested and showed dermatitis, hyperemia, and crusts together with an orange-dotted pattern. The chigger mites were found mainly in the hind limbs and the abdomen. Microscopic identification of E. cochinocaensis was made by phase-contrast microscopy. Then, a histopathological study of the affected animals' skin was performed. Histological findings included dermatitis withmainly lymphocytic infiltrate, pustules, crusts, hyperkeratosis, and the mites' stylostomes in the dermis and epidermis. This is the first report of trombiculosis caused by E. cochinocaensis in llamas from Argentina. Mites of the family Trombiculidae are vectors of certain diseases to humans and animals and are therefore of sanitary and productive importance.


Assuntos
Camelídeos Americanos , Trombiculíase , Trombiculidae , Animais , Argentina , Trombiculidae/classificação , Trombiculidae/fisiologia , Camelídeos Americanos/parasitologia , Trombiculíase/veterinária , Trombiculíase/parasitologia , Trombiculíase/patologia , Masculino , Feminino
2.
Toxicon ; 214: 108-111, 2022 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-35643117

RESUMO

Pascalia glauca, a perennial herb known for its toxicity in ruminants, is one of the most important toxic plants in northwestern Argentina. This work describes several outbreaks of natural intoxication with P. glauca from different sources affecting cattle, sheep and goats in different production systems, with morbidity varying between 1% and 100%. Clinical signs included tremors in the hindquarters, recumbency and death. The liver showed swelling, congestion and a mottled appearance. Histopathologic findings included centrilobular hepatocellular necrosis with hemorrhage.


Assuntos
Doenças dos Bovinos , Intoxicação por Plantas , Doenças dos Ovinos , Animais , Argentina/epidemiologia , Bovinos , Doenças dos Bovinos/epidemiologia , Doenças dos Bovinos/patologia , Surtos de Doenças/veterinária , Cabras , Intoxicação por Plantas/epidemiologia , Intoxicação por Plantas/patologia , Intoxicação por Plantas/veterinária , Ruminantes , Ovinos , Doenças dos Ovinos/epidemiologia , Doenças dos Ovinos/patologia
3.
Toxicon ; 200: 134-139, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34314765

RESUMO

Hairy vetch (Vicia villosa) poisoning in cattle is characterized by a systemic granulomatous inflammatory response that resembles a type-IV hypersensitivity reaction. Hairy vetch toxicity has been described in cattle worldwide. The aim of this paper was to describe 10 outbreaks of hairy vetch poisoning in cattle studied at INTA EEA Salta and INTA EEA Balcarce, Argentina, from 2004 to 2019. Clinical signs included weakness, pyrexia, dermatitis, alopecia, and progressive weight loss, which leads to death over a clinical course of approximately two weeks. A total of 12 necropsies were performed and tissue samples were collected for histopathology. The main gross changes were observed in skin, lymph nodes, liver, heart, spleen and kidneys. Other tissues, such as pancreas, thyroid, and adrenal glands, were also affected. Histological lesions consisted of multifocal to diffuse granulomatous inflammation in those organs. The toxicity of hairy vetch has been described in several countries of the world. In Argentina, the use of hairy vetch as a cover crop has become common in some regions during the past years. The data suggest that hairy vetch poisoning is an important disease in cattle. More studies are needed to contribute with further information.


Assuntos
Doenças dos Bovinos , Intoxicação por Plantas , Vicia , Animais , Argentina/epidemiologia , Bovinos , Doenças dos Bovinos/epidemiologia , Intoxicação por Plantas/epidemiologia , Intoxicação por Plantas/veterinária , Estudos Retrospectivos
4.
Toxicon ; 164: 16-19, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30946913

RESUMO

The aim of this paper was to report an outbreak of avocado poisoning in rabbits in Salta, Argentina. Fourteen rabbits died of congestive heart failure within 30 h of ingesting fresh avocado leaves from pruned trees. They showed clinical signs of respiratory and cardiac distress. Full necropsies of four rabbits were performed and samples were collected for histopathology. The gross pathological observation included pleural and pericardial effusion, pulmonary oedema, slight ascites; the hearts appeared flabby and markedly pale. In addition, the stomach content consisted mostly of green feed with large amounts of avocado leaves. Epidermal fragments of Persea americana were identified by microhistological analysis of gastric content to get most efficiently to a correct diagnosis. Histopathological examination revealed degeneration and necrosis of myocytes and a mononuclear cellular infiltration mainly involving the myocardium and, to a lesser extent, the liver, lung and kidneys. Our observations indicate that avocado leaves should be avoided in the green diet of rabbits.


Assuntos
Insuficiência Cardíaca/veterinária , Persea/intoxicação , Folhas de Planta/intoxicação , Intoxicação por Plantas/veterinária , Animais , Insuficiência Cardíaca/induzido quimicamente , Insuficiência Cardíaca/patologia , Derrame Pericárdico/induzido quimicamente , Derrame Pericárdico/veterinária , Intoxicação por Plantas/patologia , Derrame Pleural/induzido quimicamente , Derrame Pleural/veterinária , Edema Pulmonar/induzido quimicamente , Edema Pulmonar/patologia , Edema Pulmonar/veterinária , Coelhos
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