Mycotoxicoses
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Surto de aflatoxicose aguda em cães no município de Pelotas/RS
RESUMO: As aflatoxinas pertencem ao grupo das micotoxinas e são substâncias sintetizadas durante a multiplicação de fungos que podem contaminar alimentos e rações animais, produzindo efeitos agudos ou crônicos naqueles que os consomem. Os cães são sensíveis aos efeitos tóxicos das aflatoxinas, havendo dificuldades de diagnóstico definitivo desta
Pesq. Vet. Bras.. Publicado em: 2017-11
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2. Avaliação dos efeitos da fertilização nitrogenada (uréiae uréia com NBPT) e do Fungicida maxim - XL na produção de fumonisinas por Fusarium verticillioides
Corn is an economically important cereal worldwide, but it is susceptible to toxigenic fungi contamination, mainly Fusarium verticillioides. This fungus produces fumonisins, which cause several mycotoxicoses and probably esophageal cancer in humans. Due to the problems caused by F. verticillioides and fumonisin contamination in corn, during its cultivation s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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3. Zearalenone, deoxynivalenol, and T-2 toxin associated with stalk rot in corn.
The mycotoxins zearalenone (2.8 micrograms/g), deoxynivalenol (1.5 microgram/g), and T-2 toxin (110 ng/g) have been found in the pith of corn stalks standing in the field. Such contaminated stalks may contribute to mycotoxicoses of farm animals.
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4. Production and Biological Activity of Secalonic Acid D
Twenty isolates of Penicillium oxalicum produced secalonic acid as their major secondary metabolite. Fermentation conditions were determined for toxin production in grain and liquid media. The 50% lethal dose value for mice ranged from 26.5 to 51.7 mg/kg dependent on animal strain and sex, males being more susceptible than females. Secalonic acid was nontoxi
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5. Mycotoxins and mycoflora in animal feedstuffs in western Canada.
Feed samples associated with 51 cases of suspected or potential mycotoxicoses of farm animals in western Canada were examined during a three year study. Ochratoxin A was detected in four cases, T-2 toxin and diacetoxyscirpenol in one, and sterigmatocystin in one. Samples examined for microflora associated with production of these mycotoxins contained Penicil
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6. Tremorgenic mycotoxins from Aspergillus fumigatus as a possible occupational health problem in sawmills.
Wood-trimmers' disease, generally called extrinsic allergic alveolitis, which affects workers in sawmills, is thought to be caused by fungal diaspores. The importance of Aspergillus fumigatus on the surface of wood dried in kilns is accentuated by its ability to produce tremorgenic mycotoxins. Eight strains of A. fumigatus from five different sawmills were i
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7. Survey of aflatoxicosis in farm animals.
Over a 22-month period, 278 submissions of farm animals were made to the North Carolina Diagnostic Laboratory for suspected aflatoxicosis, and 94 cases were confirmed on the basis of finding aflatoxin in the feed and the occurrence of bile ductule proliferation. There was an annual variation in the incidence of aflatoxicosis, as well as a seasonal variation:
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8. Identification of swainsonine as a probable contributory mycotoxin in moldy forage mycotoxicoses.
When infested with the fungus Rhizoctonia leguminicola, certain forages, e.g., red clover hay, can cause a "slobber syndrome" of varying severity when consumed by ruminants. The causative agent has been presumed to be slaframine [(1S,6S,8aS)-1-acetoxy-6-aminooctahydroindolizine], which is produced by R. leguminicola. In one serious outbreak of the slobber sy
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9. Evaluation of Bone Strength During Aflatoxicosis and Ochratoxicosis †
Young chickens were fed graded levels of aflatoxin (0, 0.625, 1.25, 2.5, 5.0, and 10.0 μg/g of diet) or ochratoxin (0, 0.5, 1.0, 2.0, 4.0, and 8.0 μg/g of diet), and the breaking strength, displacement before failure, and diameter of their tibias were determined. Breaking strength was decreased at growth inhibitory levels of aflatoxin (2.5 μg/g) and ochra
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10. Fumonisin B1 production by Fusarium species other than F. moniliforme in section Liseola and by some related species.
Strains of Fusarium proliferatum, F. subglutinans, F. anthophilum, F. annulatum, F. succisae, F. beomiforme, F. dlamini, F. napiforme, and F. nygamai from a variety of substrates and geographic areas were tested for the production of fumonisin B1 in culture. None of the cultures of F. subglutinans (0 of 23), F. annulatum (0 of 1), F. succisae (0 of 2), or F.
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11. Macrocyclic trichothecene toxins produced by Stachybotrys atra strains isolated in Middle Europe.
A total of 17 strains of Stachybotrys atra isolated in Hungary and Czechoslovakia were cultured on Sabouraud agar, and the toxins produced by them were chemically analyzed by gas-liquid chromatography, high-pressure liquid chromatography, and mass spectroscopy. Furthermore, brine shrimp (Artemia salina) bioassay was used for the determination of toxicity of
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12. Immunobiological Effects of Fumonisin B1 in Experimental Subchronic Mycotoxicoses in Rats
Fumonisin B1 (FB1), the principal secondary metabolite produced by the fungus Fusarium verticillioides (Gibberella fujikuroi mating population A), is a potent toxin that can be found in fungus-contaminated corn and corn-based food products. We have investigated the immunobiological effects of subchronic dietary exposure to FB1 in male Wistar rats. Animals we
American Society for Microbiology.