Graduate Program in Animal Science

Brazil

Graduate Program in Animal Science

Brazil
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Campigotto G.,Santa Catarina State University | da Silva A.S.,Santa Catarina State University | Volpato A.,Graduate Program in Animal Science | Favero J.F.,Graduate Program in Animal Science | And 5 more authors.
Comparative Clinical Pathology | Year: 2017

Toxoplasma gondii is responsible for reproductive failure in sheep, and it is considered a zoonotic parasite. Therefore, the aim of this study was to evaluate the prevalence of toxoplasmosis and its risk factors at the farm level. For that, 314 sheep from 18 farms of 7 municipalities of the West part of Santa Catarina State, Southern Brazil were used. To identify possible risk factors associated to the disease, a survey was applied to farmers with questions regarding farm characteristics, type of management, and history of animal reproductive problems. Out of 314 sera samples, 118 (37%, CI 95% 32.3–43.3) were positives for T. gondii. Multivariate analyses showed that allowing cats to have access to sheep feed was significantly associated to toxoplasmosis, with an odds ratio of 2.42. Similarly, keeping cats in the farm increased 1.67 times the chances of T. gondii infection by sheep. Therefore, we concluded that sheep infection by T. gondii in the West of Santa Catarina state is distributed very similarly to other regions of Brazil, and the presence of cats in the property is strongly correlated to the occurrence of the disease. © 2017 Springer-Verlag London


Grosskopf H.M.,Santa Catarina State University | Grosskopf R.K.,Santa Catarina State University | Biazus A.H.,Graduate Program in Animal Science | Leal M.L.R.,Federal University of Santa Maria | And 8 more authors.
Experimental Parasitology | Year: 2017

The aim of this study was to evaluate the effect of copper edetate on biochemical parameters, oxidative profile, cholinesterase's activities, as well as its capacity to control gastrointestinal parasites in infected sheep. Thus, Lacaune sheep (n = 18) infected by Haemonchus contortus were used and divided into three groups of six animal each: the group A was composed of untreated animals (the control group), the group B was formed by animals treated with 0.3 mg/kg of copper edetate, and the group C was composed of animals treated with 0.5 mg/kg of copper edetate. Blood collection was performed on days 0, 10, 20 and 30 after mineral supplementation and different variables were measured. Cholinergic system was evaluated to determine the acetylcholinesterase (AChE) activity in total blood and butyrylcholinesterase (BChE) activity in serum. Eggs per gram of feces (EPG) were evaluated. There were no significant differences (P > 0.05) between groups regarding total protein, albumin, globulin and urea levels, GGT activity, as well as the hematocrit, and EPG. ALT activity decreased (P < 0.05) on groups B and C on day 30 compared to the control group (the group A). AChE activity decreased (P < 0.05) in the group C on days 10 and 30 compared to the control group, such decrease (P < 0.05) was also observed for BChE activity in the group C on day 10. ROS levels increased in the group C compared to groups A and B on day 10, while the SOD activity increased in the group C on days 20 and 30 compared to the control group (P < 0.05). CAT activity did not differ between groups (P > 0.05). In summary, the copper edetate was not efficient to control gastrointestinal parasites, but efficiently activated SOD, an important antioxidant enzyme. In addition, copper edetate was able to partially inhibit cholinesterase's activities when supplementated at its highest dose. © 2016 Elsevier Inc.


PubMed | University of Minnesota, Federal University of Santa Maria, Santa Catarina State University and Graduate Program in Animal Science
Type: | Journal: Experimental parasitology | Year: 2016

The aim of this study was to evaluate the effect of copper edetate on biochemical parameters, oxidative profile, cholinesterases activities, as well as its capacity to control gastrointestinal parasites in infected sheep. Thus, Lacaune sheep (n=18) infected by Haemonchus contortus were used and divided into three groups of six animal each: the group A was composed of untreated animals (the control group), the group B was formed by animals treated with 0.3mg/kg of copper edetate, and the group C was composed of animals treated with 0.5mg/kg of copper edetate. Blood collection was performed on days 0, 10, 20 and 30 after mineral supplementation and different variables were measured. Cholinergic system was evaluated to determine the acetylcholinesterase (AChE) activity in total blood and butyrylcholinesterase (BChE) activity in serum. Eggs per gram of feces (EPG) were evaluated. There were no significant differences (P>0.05) between groups regarding total protein, albumin, globulin and urea levels, GGT activity, as well as the hematocrit, and EPG. ALT activity decreased (P<0.05) on groups B and C on day 30 compared to the control group (the group A). AChE activity decreased (P<0.05) in the group C on days 10 and 30 compared to the control group, such decrease (P<0.05) was also observed for BChE activity in the group C on day 10. ROS levels increased in the group C compared to groups A and B on day 10, while the SOD activity increased in the group C on days 20 and 30 compared to the control group (P<0.05). CAT activity did not differ between groups (P>0.05). In summary, the copper edetate was not efficient to control gastrointestinal parasites, but efficiently activated SOD, an important antioxidant enzyme. In addition, copper edetate was able to partially inhibit cholinesterases activities when supplementated at its highest dose.


Abreu M.L.C.,Graduate Program in Animal Science | Vieira R.A.M.,State University of Norte Fluminense | Rocha N.S.,Graduate Program in Animal Science | Araujo R.P.,Graduate Program in Animal Science | And 4 more authors.
Asian-Australasian Journal of Animal Sciences | Year: 2014

Samples of Clitoria ternatea L. (Cunhã) were harvested at 35, 50, 70, and 90 d after a uniformity harvest in a field study designed as a completely randomized design with a total of 18 experimental plots. The dry matter yield of the whole plant was separated quantitatively into leaves, stems, and pods at each harvesting age. Chemical analyses and in vitro gas production kinetics were performed to assess the quality of the plant parts. Yields, chemical composition, and estimates of gas production parameters were analyzed by fitting a mixed statistical model with two types of covariance structures as follows: variance components and an unrestricted structure with heterogeneous variances. Fast and slow gas yielding pools were detected for both leaves and stems, but only a single pool was detected for pods. The homoscedasticity assumption was more likely for all variables, except for some parameters of the gas production kinetics of leaves and stems. There was no presence of typical pods at 35 and 50 d. In the leaves, the fibrous fractions were affected, whereas the non-fibrous fractions were unaffected by the harvesting age. The harvesting age affected the majority of the chemical constituents and gas kinetic parameters related to the stems. The leaves of this legume were the least affected part by the aging process. © 2014 by Asian-Australasian Journal of Animal Sciences.

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