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Dive into the research topics where André Gustavo Cabrera Dalto is active.

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Featured researches published by André Gustavo Cabrera Dalto.


Pesquisa Veterinaria Brasileira | 2010

Fireweed (Senecio madagascariensis) poisoning in cattle

Claudio Estevao Farias da Cruz; Fernando Sérgio Castilhos Karam; André Gustavo Cabrera Dalto; Saulo Petinatti Pavarini; Paulo Mota Bandarra; David Driemeier

In a dairy cattle herd in southern Brazil, 7 out of 554 cattle were affected and died due to Senecio madagascariensis poisoning. Clinical, pathological, and epidemiological findings in the affected cattle were indistinguishable from those usually seen in poisoning caused by other Senecio species. The plant invaded extensive areas in heavily stocked paddocks. Senecio madagascariensis had been spreading in this farm for the last three years, with no control strategy, because neither the farmers nor the local veterinarian knew about the potential risks of this Sernecio species.In a dairy cattle herd in southern Brazil, 7 out of 554 cattle were affected and died due to Senecio madagascariensis poisoning. Clinical, pathological, and epidemiological findings in the affected cattle were indistinguishable from those usually seen in poisoning caused by other Senecio species. The plant invaded extensive areas in heavily stocked paddocks. Senecio madagascariensis had been spreading in this farm for the last three years, with no control strategy, because neither the farmers nor the local veterinarian knew about the potential risks of this Sernecio species.


Tropical Animal Health and Production | 2012

Clinical and pathological insights into Johne′s disease in buffaloes

André Gustavo Cabrera Dalto; Paulo Mota Bandarra; Saulo Petinatti Pavarini; Fabiana M. Boabaid; Ana Paula Gobbi de Bitencourt; Marcos José Pereira Gomes; José Artur Bogo Chies; David Driemeier; Claudio Estevao Farias da Cruz

Alternative diagnostic tools and interesting epidemiological assumptions were associated with an outbreak of Johne′s disease. In a buffalo herd infected with paratuberculosis, seven clinically affected animals and 21 animals with anti-Mycobacterium avium ELISA reactions were identified. Total herd included 203 buffaloes. Most lesions were comparable to those described in buffaloes and cattle affected by Johne′s disease. Water buffalo behaviors such as communal nursing and allosuckling may be additional risk factors for this disease. Detection of positive Ziehl–Neelsen staining and anti-M. avium immunolabeling in rectal biopsies from one buffalo with paratuberculosis are highlighted as auxiliary diagnostic tools for Johne′s disease in live animals.


Arquivo Brasileiro De Medicina Veterinaria E Zootecnia | 2010

Equine intestinal pythiosis in Southern Brazil

P.S. Bezerra Júnior; Pedro Miguel Ocampos Pedroso; Saulo Petinatti Pavarini; André Gustavo Cabrera Dalto; Janio Morais Santurio; David Driemeier

The most common clinical presentation of the disease is the cutaneous form, which is characterized by granulomatous ulcerative lesions and yellow to tan necrotic masses, also termed ‘kunkers’ (Santurio et al., 2006). Nevertheless, isolated cases of enteric pythiosis have sporadically been described in horses (Brown and Roberts, 1988; Morton et al., 1991; Purcell et al., 1994), cats (Barker et al., 1993), and most commonly in dogs (Dykstra et al., 1999). The pathogenesis of intestinal pythiosis is not completely understood. It has been suggested that previous injury caused by vegetal material or pathogenic agents on the intestinal mucosa may be important predisposing factors (Morton et al., 1991; Purcell et al., 1994). Alternatively, the disease could also occur by active penetration of the agent (Brown and Roberts, 1988). This case report describes the pathologic and immunohistochemical findings observed in a case of equine intestinal pythiosis. An eight-year-old English Thoroughbred mare was presented for clinical examination with a


Pesquisa Veterinaria Brasileira | 2012

Utilização de biópsias da terceira pálpebra e mucosa retal em ovinos para diagnóstico de scrapie em uma propriedade da região sul do Brasil

Juliano de Souza Leal; Gabriel Laizola Frainer Correa; André Gustavo Cabrera Dalto; Gisele Silva Boos; Eduardo Conceição de Oliveira; Paulo Mota Bandarra; Rui Fernando Felix Lopes; David Driemeier

Scrapie, a form of transmissible spongiform encephalopathy (TSEs) is a fatal neurodegenerative disorder that affects sheep and goats. The disease is characterized by an accumulation of the abnormal prionic protein (PrPSc) in the encephalic and lymphoreticular tissues. This paper describes the use of anti-prionic protein immunohistochemical (IHC) procedure as a method of pre-clinical diagnosis of scrapie.The test was carried out in biopsied lymphoreticular tissues from third eyelid and rectal mucosa. Anti-prion protein monoclonal antibodies F89/160.1.5 and F99/97.6.1 were used. Scrapie diagnosis in lymphoreticular tissues through IHC was achieved when the samples had a minimum of three lymphoid follicles in well delimited germinal centre. Positive immunostaining was identified in 19 out of 318 samples of the third eyelid. Material sampled at post-mortem examination in 18 of these scrapie-positive sheep, which were previously verified by biopsy, and in 21 of its relatives, was confirmed with IHC tests. Positive immunostaining from rectal mucosa tissue was not observed. Third eyelid and tonsil were the organs with the larger amount of positive immunostaining (18/18 and 8/18 respectively) at post-mortem examination. None positive result was obtained along the 21 animals related to the positive ones, and none of the positive cases showed IHC labeling in the brain. The use of lymphoid tissues for scrapie diagnosis by IHC through biopsies showed to be a viable and efficient method for pre-clinical diagnostic.


Pesquisa Veterinaria Brasileira | 2011

Records of performance and sanitary status from a dairy cattle herd in southern Brazil

Claudio Estevao Farias da Cruz; Djeison Lutier Raymundo; Cristine Cerva; Saulo Petinatti Pavarini; André Gustavo Cabrera Dalto; Luis Gustavo Corbellini; David Driemeier

Over the last decades, the emphasis on the health of dairy cows has changed from an individual to a herd level. In this scenario, the role played by the recording system and its interpretation by veterinarians has gained primordial importance. The records of productive and reproductive performance and of sanitary status from a southern Brazilian dairy cattle herd have been presented and discussed. The period of study was 2000-2009. Mean values per lactation period were 349D 8436M 290F 275P 201SCS (D: days in lactation, M: kg of milk yield, F: kg of fat, P: kg of protein and SCS: somatic cell score in 1000 cells/ml of milk). Major indexes of reproductive efficiency included age at first calving (31 months), services per conception (2.1), intercalving interval (428 days), calving to conception interval (146 days), mean annual rates of parturitions (76.2%), fetal losses (9.8-19.0%), and stillbirths (3.6%), apart of voluntary waiting period (94 days). Main information on sanitary status of the herd was associated with the mean prevalence of common disorders of dairy cattle such as anaplasmosis (29.8%), mastitis (27.8%), digital diseases (26.3%), ovarian cysts (21.3%), placental retention (19.7%), postpartum uterine infections (10.6%), and calf diarrhea (23.7%) and pneumonia (16.8%), among others. In addition, culling reasons (low reproductive performance [56.3%] and udder/mastitis problems [33.6%]), causes of cattle deaths (anaplasmosis [16.4%] and leukosis [11.4]), and the impact of cattle diseases such as tuberculosis, leukosis, and neosporosis on the herd have also been presented and succinctly discussed. Numbers between brackets represent rates accumulated in the 10-year period.


Pesquisa Veterinaria Brasileira | 2009

Timpanismo espumoso em bovinos leiteiros em pastagens de Trifolium spp. (Leg.Caesalpinoideae)

André Gustavo Cabrera Dalto; Paulo Mota Bandarra; Pedro Miguel Ocampos Pedroso; Fábio de Souza Guagnini; Juliano de Souza Leal; Djeison Lutier Raymundo; David Driemeier

Leguminous bloat may occur in cattle which graze pastures consisting of lush forages. In a dairy farm located on the municipality of Sao Francisco de Paula, Rio Grande do Sul, eight out of 66 cows died suddenly after being transferred to a paddock whose pastures were composed of Trifolium repens and Trifolium pratense. Animals were found dead in the morning of the next day after being transferred; no clinical signs were noticed. Main gross findings included enhanced abdominal volume, protrusion and congestion of the tongue and vagina, ruminal distension, pale liver, and enhanced spleen. Histologically, there were lung congestion and edema, and splenic lymphoid hyperplasia. The evidence of leguminous forages consumption associated with the pathological findings and the absence of growth on bacteriology confirmed the diagnosis.


Pesquisa Veterinaria Brasileira | 2012

Perreyia flavipes larvae toxicity

Djeison Lutier Raymundo; Pedro S. Bezerra; Paulo Mota Bandarra; André Gustavo Cabrera Dalto; Mauro Pereira Soares; Claudio Estevao Farias da Cruz; David Driemeier

Fresh or thawed Perreyia flavipes larvae were ground and mixed with water and orally ad ministered to sheep. At 5mg/kg, neither clinical nor enzymatic changes were observed. Unique do ses of 7.5 and 10mg/kg induced characteristic clinical signs of Perreyia sp. larvae poisoning, increased GGT and AST values, and decreased glycemic curves. However, doses of 5, 10, and 15mg/kg repeated at 30 or 15 days intervals caused no disease and mild disease followed by death, respectively. These fin dings indicate that these animals probably developed some degree of tolerance to the toxins in P. flavipes larvae. Ultrastru ctural examination of liver revealed proliferation of the smooth endoplasmic reticulum in the hepatocytes, which may be associated with an increased ability to metabolize toxins and could consequently lead to the tolerance observed in the present study. Further investigations may elucidate whether such tolerance effects could be applied as a control measure for P. flavipes poioning or other hepatotoxic diseases. In addition, clinicopathological findings were discussed.


Pesquisa Veterinaria Brasileira | 2011

Surto de intoxicação por monensina em avestruzes e equinos no sul do Brasil

Saulo Petinatti Pavarini; Flademir Wouters; Paulo Mota Bandarra; Felipe Silveira de Souza; André Gustavo Cabrera Dalto; Danilo Carloto Gomes; Claudio Estevao Farias da Cruz; David Driemeier

An outbreak of monensin poisoning affected ostriches and horses from a farm in Rio Grande do Sul. Eight days before the onset of clinical signs, a commercial cattle concentrate containing monensin (177ppm) was introduced in the diet of the animals. Three horses showed difficulty moving, cramping, sweating and permanent recumbency, and death within 48 hours. Three ostriches showed sternal permanent recumbency or sluggish and reluctance to move. Two ostriches died 15 and 30 days after the onset of signs. Gross changes in the horses included multifocal myocardial pallor, endocardial and epicardial hemorrhages mainly around the coronary vessels, and bilateral yellowish white foci in skeletal muscles. Histological lesions were necrotic myopathy and cardiomyopathy. At necropsy of ostriches, skeletal muscles were diffusely pale with multiple small white spots, which corresponded to polyphasic segmental necrosis and regenerative changes


Acta Scientiae Veterinariae | 2009

Rinite micótica rinofaríngea em um ovino Texel no Rio Grande do Sul

Pedro Miguel Ocampos Pedroso; Djeison Lutier Raymundo; Pedro Soares Bezerra Junior; Eduardo Conceição de Oliveira; Luciana Sonne; André Gustavo Cabrera Dalto; David Driemeier


Acta Scientiae Veterinariae | 2009

Diagnóstico imuno-histoquímico de pitiose cutânea em equinos

Pedro Miguel Ocampos Pedroso; Pedro Soares Bezerra Junior; Caroline Argenta Pescador; André Gustavo Cabrera Dalto; Giovana Rosa da Costa; Daniela Isabel Brayer Pereira; Janio Morais Santurio; David Driemeier

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David Driemeier

Universidade Federal do Rio Grande do Sul

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Paulo Mota Bandarra

Universidade Federal do Rio Grande do Sul

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Pedro Miguel Ocampos Pedroso

Universidade Federal do Rio Grande do Sul

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Claudio Estevao Farias da Cruz

Universidade Federal do Rio Grande do Sul

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Saulo Petinatti Pavarini

Universidade Federal do Rio Grande do Sul

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Djeison Lutier Raymundo

Universidade Federal do Rio Grande do Sul

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Juliano de Souza Leal

Universidade Federal do Rio Grande do Sul

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Caroline Argenta Pescador

Universidade Federal do Rio Grande do Sul

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Danilo Carloto Gomes

Universidade Federal do Rio Grande do Sul

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Eduardo Conceição de Oliveira

Universidade Federal do Rio Grande do Sul

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