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Faria WCS, Martinelli RC, Arcas AS, Da Silva Junior IF, Colodel EM, Cavenaghi DFLC, Oliveira AP, Barros WM. Acute and Subacute Toxicity Study on Dietary Supplementation with Soy Isoflavones in Wistar Rats. CNF 2018. [DOI: 10.2174/1573401313666170821154016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- WCS Faria
- Faculty of Food Engineering, Department of Food Science, State University of Campinas, UNICAMP, University City Zeferino Vaz, Barao Geraldo, Campinas, SP, CEP 13083-970, Brazil
| | - RC Martinelli
- Faculty of Food Engineering, Federal Institute of Education, Science and Technology of Mato Grosso, IFMT. Juliano Costa Marques Street, Bela Vista, Cuiaba, MT, Brazil
| | - AS Arcas
- Faculty of Food Engineering, Federal Institute of Education, Science and Technology of Mato Grosso, IFMT. Juliano Costa Marques Street, Bela Vista, Cuiaba, MT, Brazil
| | - IF Da Silva Junior
- Laboratory of Pharmacology, Department of Basic Sciences of health, Faculty of Medicine, Federal University of Mato Grosso, UFMT, Fernando Correa da Costa Street, nº 2367, Boa Esperanca, Cuiaba, MT, Brazil
| | - EM Colodel
- Laboratory of Veterinary Pathology, Department of Medical Clinic Veterinary, Faculty of Veterinary Medicine, Federal University of Mato Grosso, UFMT, Fernando Correa da Costa Street, nº 2367, Boa Esperanca, Cuiaba, MT, Brazil
| | - DFLC Cavenaghi
- Faculty of Food Engineering, Federal Institute of Education, Science and Technology of Mato Grosso, IFMT. Juliano Costa Marques Street, Bela Vista, Cuiaba, MT, Brazil
| | - AP Oliveira
- Faculty of Food Engineering, Federal Institute of Education, Science and Technology of Mato Grosso, IFMT. Juliano Costa Marques Street, Bela Vista, Cuiaba, MT, Brazil
| | - WM Barros
- Faculty of Food Engineering, Federal Institute of Education, Science and Technology of Mato Grosso, IFMT. Juliano Costa Marques Street, Bela Vista, Cuiaba, MT, Brazil
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Ubiali DG, Cruz RAS, De Paula DAJ, Silva MC, Mendonça FS, Dutra V, Nakazato L, Colodel EM, Pescador CA. Pathology of nasal infection caused by Conidiobolus lamprauges and Pythium insidiosum in sheep. J Comp Pathol 2013; 149:137-45. [PMID: 23375916 DOI: 10.1016/j.jcpa.2012.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 11/04/2012] [Accepted: 12/05/2012] [Indexed: 10/27/2022]
Abstract
Conidiobolomycosis and pythiosis are important diseases of sheep in midwestern Brazil. Veterinary practitioners consider it difficult to differentiate between these diseases because they have similar clinical features. In this study, 186 sheep were subjected to necropsy examination over a 6-year period. Thirty (16.1%) cases of rhinitis in sheep that were caused by Conidiobolus lamprauges (n = 15) or Pythium insidiosum (n = 15) were investigated further. The lesions of C. lamprauges infection were mainly rhinopharyngeal (86.7%), localized to the ethmoidal region and associated with exophthalmos. The lesions appear as a white to yellow, firm mass that microscopically appears as a granulomatous inflammatory reaction with numerous giant cells. In contrast, P. insidiosum infection is associated with rhinofacial (93.3%) lesions that mainly involve the frontal region and hard palate and appear as an irregular, friable, yellow to red mass. Microscopically, pythiosis presents as diffuse necrotizing eosinophilic rhinitis. Immunohistochemistry using polyclonal antisera raised specifically against the two organisms was used to confirm the identity of the infectious agent in each disease. This study reports the first immunohistochemical diagnosis of conidiobolomycosis and the first description of a rhinopharyngeal lesion caused by P. insidiosum in sheep.
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Affiliation(s)
- D G Ubiali
- Laboratory of Veterinary Pathology, Federal University of Mato Grosso, Av Fernando Corrêa da Costa 2367 Bairro Boa Esperança, CEP 78069-900 Cuiabá, Mato Grosso, Brazil
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Driemeier D, Schild AL, Fernandes JCT, Colodel EM, Corrêa AMR, Cruz CEF, Barros CSL. Outbreaks of tetanus in beef cattle and sheep in Brazil associated with disophenol injection. ACTA ACUST UNITED AC 2007; 54:333-5. [PMID: 17650154 DOI: 10.1111/j.1439-0442.2007.00922.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Outbreaks of tetanus, in which 297 beef cattle and 50 sheep were affected and died, were associated with the injection of a Clostridium tetani-contaminated anthelmintic (disophenol). The disease was observed on five farms in Rio Grande Sul, Brazil.
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Affiliation(s)
- D Driemeier
- Department of Veterinary Pathology, UFRGS, CEP. 91540-000, Porto Alegre, RS, Brazil.
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Freitas DRJ, Rosa RM, Moura DJ, Seitz AL, Colodel EM, Driemeier D, Da Silva Vaz I, Masuda A. Cell death during preoviposition period in Boophilus microplus tick. Vet Parasitol 2006; 144:321-7. [PMID: 17157985 DOI: 10.1016/j.vetpar.2006.10.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Revised: 10/17/2006] [Accepted: 10/18/2006] [Indexed: 10/23/2022]
Abstract
Programmed cell death (PCD) is present during the development of multicellular organisms and occurs from embryogenesis to death. In females of Boophilus microplus, the mass of several organs is reduced after the detachment from the host. In order to better characterize the cell death process that eliminates unnecessary tissues, the degeneration of salivary glands, ovaries and synganglia was investigated using DNA fragmentation in agarose gel, comet and TUNEL assays, and apoptosis activation pathway by the caspase assay. DNA fragmentation and enzymatic activity of caspase-3 were observed in salivary glands and ovaries at 48 and 72h after tick removal from the host; in synganglia these parameters were maintained at low levels upon 48h. The results obtained suggest that there is a refined control of tissue maintenance through apoptosis.
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Affiliation(s)
- D R J Freitas
- Centro de Biotecnologia do Estado do Rio Grande do Sul, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, C.P. 15005, 91501-970 Porto Alegre, RS, Brazil
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Seitz AL, Colodel EM, Schmitz M, Gimeno EJ, Driemeier D. Use of lectin histochemistry to diagnose Sida carpinifolia (Malvaceae) poisoning in sheep. Vet Rec 2005; 156:386-8. [PMID: 15816187 DOI: 10.1136/vr.156.12.386] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- A L Seitz
- Department of Veterinary Pathology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Abstract
Brachiaria decumbens and B. brizantha (signal grass), which occupy millions of acres in Brazil, are an important source of fodder for ruminants. Sporadic outbreaks of photosensitization in ruminants grazing on signal grass have been reported. Intoxicated animals showed the presence of foamy cells in the liver, spleen, intestinal submucosa and lymph nodes. These foamy cells are macrophages. They are very difficult to distinguish with haematoxylin and eosin stain, especially in the case of isolated cells. The purpose of the present study was to detect specific carbohydrate residues of storage material in the foamy cells in tissues of cattle exposed to Brachiaria spp. The characterization of glycoconjugates provides clues to the pathogenesis of these cells. Besides, the lectin peanut agglutinin was found to be an excellent marker to differentiate and quantify the foam cells, and could be used as a specific marker.
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Affiliation(s)
- M S Gomar
- Faculty of Veterinary Sciences, Institute of Pathology, La Plata National University, PO Box 296, 1900 La Plata, Argentina
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Abstract
REASONS FOR PERFORMING STUDY This study reports a neurological disease unrecognised until now in ponies in southern Brazil. HYPOTHESIS Epidemiological data strongly suggests that the ingestion of Sida carpinifolia is involved in the aetiology. We tested the hypothesis that it is an acquired lyosomal storage disease. METHODS Following the death of 3 ponies, all ponies from the premises were closely monitored; epidemiological data and clinical findings carefully recorded. Fragments of several organs, including CNS, were fixed in neutral formalin and embedded in paraffin-wax. Sections were stained with haematoxylin and eosin. Representative sections of the cerebellum and trigeminal ganglia were submitted to lectin histochemical procedures. RESULTS The neurological disorder, characterised by stiff gait, muscle tremors, abdominal pain and death, was observed on a farm with 3 hectares of pasture. Three of 11 ponies died 15-20 days after they had been introduced into a new paddock heavily infested by the plant Sida carpinifolia. No significant gross lesions were observed. The main histological findings included multiple cytoplasmatic vacuoles in swollen neurones in the brain, cerebellum, spinal cord, autonomic ganglia (trigeminal and celiac ganglia), and submucosal and myenteric plexus of the intestines. In the kidneys, there was marked vacuolation of the proximal convoluted tubular cells. Sections of cerebellum and trigeminal ganglion were submitted to lectin histochemistry. The vacuoles in different cerebellar and ganglion cells reacted strongly to the following lectins: Concanavalia ensiformis, Triticum vulgaris and succinylated-Triticum vulgaris. CONCLUSIONS The pattern of staining coincides with that of both swainsonine toxicosis and inherited mannosidosis reports. The histopathological changes were similar to those described in S. carpinifolia spontaneous and experimental poisoning in goats. This disease seems to be similar to Swainsona, Oxytropis and Astragalus toxicosis. POTENTIAL RELEVANCE S. carpinifolia should be evaluated as a possible cause in the diagnosis of equine neuropathies.
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Affiliation(s)
- A P Loretti
- Department of Pathology, Veterinary Faculty, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Corbellini LG, Colodel EM, Driemeier D. Granulomatous encephalitis in a neurologically impaired goat kid associated with degeneration of Neospora caninum tissue cysts. J Vet Diagn Invest 2001; 13:416-9. [PMID: 11580064 DOI: 10.1177/104063870101300509] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Congenital Neospora caninum infection was diagnosed in a Saanen goat from a farm in southern Brazil. The kid was unable to nurse and had difficulty rising, ataxia, and opistothotonos. The neurologic signs became more severe 3 days after birth, when it was euthanized. No gross lesions were observed at necropsy. Multifocal infiltrates primarily of mononuclear cells, nodular microgliosis, and perivascular cuffs of lymphocytes, plasma cells, and few neutrophils were observed in the brain, mostly in the cortex and adjacent to ventricles. Rare multinucleate giant cells were observed adjacent to inflammatory foci. Several tissue cysts with a thick wall that reacted strongly with polyclonal antiserum to N. caninum were in the cerebral cortex and medulla oblongata. Lesions were also present in heart, lungs, and liver, but N. caninum tachyzoites were not found. Distinguishing features in this goat kid included neurologic impairment resulting from congenital infection with N. caninum and the presence of granulomatous inflammation with rare giant cells associated with degeneration of tissue cysts.
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Affiliation(s)
- L G Corbellini
- Department of Pathology, Veterinary Faculty, Universidade Federal do Rio Grande do Sul, RS, Brazil
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Cruz C, Driemeier D, Pires VS, Colodel EM, Taketa AT, Schenkel EP. Isolation of steroidal sapogenins implicated in experimentally induced cholangiopathy of sheep grazing Brachiaria decumbens in Brazil. Vet Hum Toxicol 2000; 42:142-5. [PMID: 10839316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
As part of an experimental study, crystal-associated cholangiopathy was induced in 9 sheep by grazing pure pastures of Brachiaria decumbens in Brazil. One of these sheep showed characteristic lesions of photosensitization. The analysis of the B decumbens samples by acidic hydrolysis followed by TLC and infrared spectrum revealed diosgenin as the principal sapogenin present in the plant. In the rumen contents samples from the B decumbens-grazing group were identified by TLC, 1H and 13C NMR and EIMS as epismilagenin, episarsasapogenin, and a mixture of smilagenin and sarsasapogenin. In the bile samples from the B decumbens-grazing group, TLC analysis demonstrated 2 compounds similar to epismilagenin and episarsasapogenin. However, by this same method, those compounds were not observed in the rumen contents and bile from 2 sheep which served as control animals. The P chartarum spore counts remained very low during the experimental period.
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Affiliation(s)
- C Cruz
- Department of Veterinary Pathology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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Abstract
A neurologic disease characterized by ataxia, hypermetria, hyperesthesia, and muscle tremors of the head and neck was observed for 2 years in a flock of 28 Anglo-Nubian and Saanen goats on a farm with 5 ha of pasture. Six newborns died during the first week of life, and five abortions were recorded. The predominant plant in the pasture was Sida carpinifolia. The disease was reproduced experimentally in two goats by administration of this plant. Three goats with spontaneous disease and the two experimental animals were euthanatized and necropsied. No significant gross lesions were observed. Fragments of several organs, including the central nervous system, were processed for histopathology. Small fragments of the cerebellar cortex, liver, and pancreas of two spontaneously poisoned goats and two experimentally poisoned goats were processed for electron microscopy. Multiple cytoplasm vacuoles in hepatocytes, acinar pancreatic cells, and neurons, especially Purkinje cells, were the most striking microscopic lesions in the five animals. Ultrastructural changes included membrane-bound vacuoles in hepatocytes, Kupffer cells, acinar pancreatic cells, Purkinje cells, and the small neurons of the granular cell layer of the cerebellum. Paraffin-embedded sections of the cerebellum and pancreas were submitted for lectin histochemical analysis. The vacuoles in different cerebellar and acinar pancreatic cells reacted strongly to the following lectins: Concanavalia ensiformis, Triticum vulgaris, and succinylated Triticum vulgaris. The pattern of staining, analyzed in Purkinje cells and acinar pancreatic cells coincides with results reported for both swainsonine toxicosis and inherited mannosidosis.
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Affiliation(s)
- D Driemeier
- Department of Pathology, Veterinary Faculty, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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