Bellino C.,University of Turin |
Arnaudo F.,Medico Veterinario |
Biolatti C.,University of Turin |
Borrelli A.,University of Turin |
And 5 more authors.
Journal of the American Veterinary Medical Association | Year: 2012
Objective: To develop a diagnostic diagram for rapid field assessment of acidosis severity in diarrheic calves. Design: Prospective cross-sectional study. Animals: 148 Piedmontese calves (38 calves in preliminary experiments; 83 diarrheic calves and 27 healthy control calves in the primary experiment). Procedures: Physical examination was performed and a standard data collection form was completed for each calf. Blood samples were obtained and submitted for evaluation of acidbase balance, performance of a CBC, and measurement of electrolyte and total protein concentrations. Results: Severe metabolic acidosis (extracellular base excess more negative than -10 mmol/L) was associated with abnormal mental status, delayed or absent suckle reflex, abnormal posture or gait, enophthalmos, and cold oral mucosal membranes. Clinical signs associated with severe metabolic acidosis were arranged into a grid to create a diagnostic diagram. Sensitivity and specificity of the diagnostic diagram for the prediction of severe metabolic acidosis were 88% and 79%, respectively. Conclusions and Clinical Relevance: Use of the diagnostic diagram may aid differentiation between severe and nonsevere acidosis patterns as determined on the basis of clinical signs.
Snak A.,Santa Catarina State University |
Soares P.R.H.,Medico Veterinario |
Da Silva E.G.,Federal University of Paraná |
Sereno M.J.,Federal University of Paraná |
And 3 more authors.
Semina:Ciencias Agrarias | Year: 2017
Cryptosporidiosis is an emerging zoonosis that causes many outbreaks worldwide. Its main route of transmission is the consumption of contaminated water or food. In Brazil, data on to the occurrence of cryptosporidiosis in animals and in humans are scarce; thus, it is important to determine the occurrence of Cryptosporidium sp. and to identify possible sources of water and food contamination in order to prevent the disease and, consequently, preserve of human health. From July/2011 to March/2012, five liters of water were collected in 10 different locations from eight artificial beaches of Itaipu Lake, Paraná, in a total of 40 samples. In two other small beaches of the lake, water was also collected from two different sites of each beach, given their size and because they were made up of water from different sources. Samples were analyzed by the modified Ziehl-Neelsen technique and nested-PCR (nPCR). All samples were negative in the modified Ziehl-Neelsen; only one (2.25%) sample was positive in nPCR. These results indicate that PCR is a more sensitive technique for the identification of Cryptosporidium in water samples. In this study, it was not possible to identify the species involved and, thus, the source of infection. Water contamination by Cryptosporidium oocytes can be caused by livestock kept near waterways, and by the people who use the place for recreational purposes. These results demonstrate risk for people who use the lake. Care should be determined to prevent the transmission of this important zoonosis.
Barbosa Silveira I.D.,Federal University of Pelotas |
Peters M.D.P.,Federal University of Pelotas |
Storch T.,Medico veterinario |
Ziguer E.A.,Federal University of Pelotas |
Fischer V.,Federal University of Rio Grande do Sul
Arquivo Brasileiro de Medicina Veterinaria e Zootecnia | Year: 2011
The economical profitability and viability of the implantation of a milk production system in free stall were evaluated. A technical-market analysis was done to define the necessary investment as well as to determine the costs of each production factor. A production model with 100 lactating cows averaging 2,595 liters of daily production was considered. The total monthly operational cost was R$27,781.39 showing that nutrition is the variable with higher relevance (62.7% of the cost). For the monthly gross income a value of R$43,817.50 was obtained and, consequently, the monthly net income (NI)was R$16,030.11. A 12.2% profitability per year from NI rendering a deficit net value of R$131,627.39. Considering the estimated prices it is concluded that the proposed model was economically unfeasible.
Da Cunha A.F.,Medicina Veterinaria |
Braganca L.J.,Medico Veterinario |
Quintao L.C.,Medico Veterinario |
Coelho K.S.,Graduando em Medicina Veterinaria |
And 2 more authors.
Acta Veterinaria Brasilica | Year: 2016
Bovine mastitis is the inflammation of the mammary gland which causes great losses in milk production. Therefore, the objective of study was to evaluate the prevalence, causative agents and factors related to management practices and production characteristics that influenced clinical mastitis in 44 dairy farms of Viçosa-MG. In 617 cows, clinical mastitis was determined by clinical examination of the mammary gland and mug test. Milk samples from mammary quarters with clinical mastitis were subjected to microbiological tests. A structured questionnaire was used to determine the risk factors for mastitis. The prevalence of clinical mastitis in cattle was 4.8%. The etiological agents more isolated were Staphylococcus aureus (29.73%), Streptococcus agalactiae (16.21%), Escherichia coli (13.51%) and yeast (13.51%). The high number of lactating animals per property, lack of herd sanity, poor hygiene of the environment and inappropriate practices of dry cow treatment had a significant association (p < 0.05) with the prevalence of clinical mastitis. Therefore, environmental and animals management should be reviewed to help to reduce cases of mastitis in cattle of Viçosa (MG).
Da Cunha A.F.,UNIVICOSA |
Braganca L.J.,Medico Veterinario |
Quintao L.C.,Medico Veterinario |
Silva S.Q.,São Paulo State University |
And 2 more authors.
Acta Veterinaria Brasilica | Year: 2015
The prevalence, causative agents and factors related to management practices and production characteristics that influenced subclinical mastitis were determined in 44 dairy farms of Viçosa-MG. In 617 cows, subclinical mastitis was diagnosed by California Mastitis Test. Milk samples from animals with mastitis were submitted to microbiological tests for confirmation of the disease. A structured questionnaire was used to determine the risk factors of mastitis. The prevalence of subclinical mastitis in herds were 55.4%. The etiological agents more isolated were Corynebacterium sp. (32.99%), Staphylococcus aureus (28.35%), Streptococcus agalactiae (13.66%), Staphylococcus coagulase negativo (13.66%) and Staphylococcus intermedius (6.19%). The low milk production, inadequate procedure of milking, supplying of disposal milk to calves, lack of mastitis treatment during the dry period, poor hygiene of cows environmental and bad quality of water in farms had significant association (p < 0.05) with the prevalence of subclinical mastitis. Better care of the milking practices and management of the property are necessary in farms of Viçosa-MG.
Frequency of antibodies against bovine viral diarrhea virus (BVDV) and bovine herpesvirus 1 (BoHV-1) in female dairy cattle production system in semi-intensive [Frequência de anticorpos e fatores de risco associados à infecção pelo vírus da diarréia viral bovina (bvdv) e herpesvírus bovino tipo 1 (bohv-1) em fêmeas bovinas leiteiras criadas em sistema de produção semi-intensivo]
De Sousa V.E.,State University of Maranhão |
Chaves N.P.,Medica veterinaria |
Santos H.P.,Medico veterinario |
De Moraes Pereira H.,Medico veterinario
Revista Brasileira de Medicina Veterinaria | Year: 2013
The object of this study was estimate the frequency of reacting animals to BVDV and BoHV-1 in milk-jug bovines cattles breeding in semi-intensive system of production. Were analyzed 156 blood's serum to BVDV and 160 to BoHV-1, from bovines females, by the test of indirect ELISA. The frequency of bovines serologically reacting to BVDV and BoHV-1 were 67,30% (105/156) and 67,50% (108/160), respectively. The results acquired in this research allowed to conclude that the BVDV and BoHV-1 are present in evaluated cattles with a high frequency and the risk factors such as milk production between 1 and 5 liters when it was the BVDV and the absent of veterinary care related to BoHV-1 are related to the infection and there is a positive and strong association between both infections.
Calderano A.A.,Federal University of Fluminense |
Nunes R.V.,West Parana State University |
Rodrigueiro R.J.B.,Evonik Industries |
Cesar R.A.,Medico Veterinario
Ciencia Animal Brasileira | Year: 2015
The objective of this study was to evaluate the use of a vegetal source of choline as a replacement of choline chloride in the diet for broilers from one to 21 and 22 to 42 days of age. In the first experiment, we used 1500 Cobb male broilers at one day of age, distributed in a completely randomized design with ten treatments, five repetitions and 30 birds per experimental unit. In the second experiment, we used 1000 Cobb male broiler at 22 days of age, distributed in a completely randomized design with ten treatments, five repetitions and 20 birds per experimental unit. The treatments consisted of five levels of choline chloride 60% (400, 500, 600, 700 and 800 mg kg-1) and five levels of vegetal source of choline (100, 150, 200, 250 and 300 mg kg-1). There was no difference between the performance parameters of broilers in the periods of one to 21 and 22 to 42 days of age. The use of up to 100 mg kg-1 of a vegetal source of choline can replace the use of choline chloride, in the studied levels, in corn-soybean meal diets for broilers from one to 21 and 22 to 42 days of age.
Dangoudoubiyam S.,University of Kentucky |
Oliveira J.B.,University of Pernambuco |
Oliveira J.B.,National University of Costa Rica |
Viquez C.,National University of Costa Rica |
And 6 more authors.
Journal of Parasitology | Year: 2011
Serum samples from 315 horses from Costa Rica, Central America, were examined for the presence of antibodies against Sarcocystis neurona, Neospora spp., and Toxoplasma gondii by using the surface antigen (SAG) SnSAG2 enzyme-linked immunosorbent assay (ELISA), the NhSAG1 ELISA, and the modified agglutination test, respectively. Anti-S. neurona antibodies were found in 42.2% of the horses by using the SnSAG2 ELISA. Anti-Neospora spp. antibodies were found in only 3.5% of the horses by using the NhSAG1 ELISA, and only 1 of these horses was confirmed seropositive by Western blot. Antibodies to T. gondii were found in 34.0% of the horses tested, which is higher than in previous reports from North and South America. The finding of anti-S. neurona antibodies in horses from geographical areas where Didelphis marsupialis has wide distribution suggests that D. marsupialis is a potential definitive host for this parasite and a source of infection for these horses. © American Society of Parasitologists 2011.
Duarte F.D.,Federal University of Minas Gerais |
Lara L.J.C.,Federal University of Minas Gerais |
Baiao N.C.,Federal University of Minas Gerais |
Cancado S.V.,Federal University of Minas Gerais |
Teixeira J.L.,Medico Veterinario
Arquivo Brasileiro de Medicina Veterinaria e Zootecnia | Year: 2010
The effects of adding tallow (T), poultry visceral oil (PVO), degummed soybean oil (DSO), and a mixture of T + PVO and T + DSO in different proportions in diets for broiler chickens were evaluated. The treatments were defined according to the lipid sources (LS) and their mixtures added to the diets and also according to the proportion of metabolizable energy (ME) originated from each LS (25, 50, and 75% of ME for each LS added to the feed). The experimental design was completely randomized. There were no differences (P>0.05) between treatments for body weight and food intake. Feed conversion (CA) of birds fed diets containing DSO and DSO + T (75 and 25% of ME) were lower than those chickens that were fed the diets with PVO and T (50 and 50% of ME); but showed similar results (P>0.05) to chickens of other treatments. The values found for abdominal fat and yield and composition of carcass were not affected by LS (P>0.05). It was concluded that the use of different lipid sources in diets for broiler chickens has no effect on performance and yield and carcass composition.
Santos G.B.,Faculdades Gammon |
Santos G.B.,São Paulo State Technological College |
Ramos P.R.R.,São Paulo State University |
Spim J.S.,Medico Veterinario
Revista Brasileira de Saude e Producao Animal | Year: 2014
The objective of this study was to identify by electrophoresis the changes in the fractions of muscle proteins during the post mortem period of different genetic groups and analyse the tenderness of meat samples refrigerated for 24 hours (not aged) and aged for 7 days. Were used forty-eight samples of Longissimus muscle from bovines of 4 genetic groups: 12 Nelore; 12 crossed 1/2 Aberdeen-Angus 1/2 Nelore x Brahman; 12 Brangus; 12 crossed 1/2 Aberdeen- Angus 1/2 Nelore x Pardo submitted to superprecoce biological model. From each sample two slices was retired, one of them was not aged and the other was aged for 7 days at 2°C. In the analysis of shear force, both the nonaged samples, as those subjected to seven days of maturation did not differ on meat tenderness, but all of them showed acceptable tenderness, which can be explained by the low age at slaughter, which was provided by the fattening system that these animals were submitted. In the eletrophoretic analysis of bands of protein was noted degradation of myosin heavy chain and Troponin-T and the appearance of the 30 kDa fragment for all genetic groups after the 7 days period of aging. All the genetic groups showed good meat tenderness, regardless the ageing time.