PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Moreira A.G.L., Coelho A.A.C., Albuquerque L.F.G., Moreira R.T. & Farias W.R.L. 2015. [Eugenol effect as a mitigate agent of stress in transport of Nile tilapia juveniles.] Efeito do eugenol como agente mitigador do estresse no transporte de juvenis de tilápia do Nilo. Pesquisa Veterinária Brasileira 35(11):893-898. Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Campus Morada Nova, Av. Santos Dumont s/n, Júlia Santiago, Morada Nova, CE 62900-000, Brazil. E-mail: antonio.glaydson@ifce.edu.br Brazil stands out in the American scene as one of the countries with the greatest potential for fish farming mainly in fresh water. Nile tilapia (Oreochromis niloticus) stands out being the most cultivated fish species in our country. Methodologies to reduce the interference of stressors agents in vital and physiological functions of fishes are important during handling. This study aimed to evaluate the effect of eugenol in the metabolic and ionic responses of juvenile Nile tilapia, submitted to transport in plastic bags, at different densities in order to verify the efficiency of the product as an mitigate agent of stress. Eugenol was used at a concentration of 15mg L-1 in water. The evaluated densities were 4, 7 and 10 fish L-1, which were equivalent to 140, 245 and 350g L-1. After four hours of transport the metabolic (glucose and lactate) and ions parameters (chloride, magnesium and calcium) were evaluated, as well as the water quality in the plastic bags. For the two metabolic parameters, the use of the eugenol in order to reduce the stress response was not satisfactory. There was an increase in blood glucose level at the densities of 140 and 350g L-1 immediately after termination of the transport, and the level of fish lactate content at the density of 245g L-1 had increased after 24 hours indicating that the animals could not maintain the initial homeostasis. Among the concentrations of the evaluated ions magnesium suffered the greater variation. We can conclude that the addition of 15 mg L-1 of eugenol in the water during the transport of juvenile Nile tilapia at densities of 140, 245 and 350g L-1 was not able to minimize stress responses.

• Nile tilapia Oreochromis niloticus eugenol stress transport tilápia de Nilo estresse transporte

Abstract in Portuguese:

RESUMO.- Moreira A.G.L., Coelho A.A.C., Albuquerque L.F.G., Moreira R.T. & Farias W.R.L. 2015. [Eugenol effect as a mitigate agent of stress in transport of Nile tilapia juveniles.] Efeito do eugenol como agente mitigador do estresse no transporte de juvenis de tilápia do Nilo. Pesquisa Veterinária Brasileira 35(11):893-898. Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Campus Morada Nova, Av. Santos Dumont s/n, Júlia Santiago, Morada Nova, CE 62900-000, Brazil. E-mail: antonio.glaydson@ifce.edu.br O Brasil se destaca no cenário americano como um dos países com maior potencial para a piscicultura, principalmente a dulcícola. A tilápia do Nilo (Oreochromis niloticus) se destaca sendo a espécie mais cultivada em nosso país. Metodologias para diminuir a interferência de agentes estressores nas funções vitais e fisiológicas dos peixes são importantes durante o manejo. O presente trabalho teve como objetivo avaliar o efeito do eugenol nas respostas metabólicas e iônicas de juvenis de tilápia do Nilo, submetidos ao transporte em sacos plásticos, em diferentes densidades, a fim de verificar a eficiência do produto como agente mitigador do estresse. O eugenol foi utilizado na concentração de 15mg/L em água. As densidades avaliadas foram 4, 7 e 10 peixes L-1, equivalente a 140, 245 e 350g L-1. Após quatro horas de transporte foram avaliados os parâmetros metabólicos (glicose e lactato) e iônicos (cloreto, magnésio e cálcio), bem como a qualidade da água nos sacos plásticos. Em relação aos dois parâmetros metabólicos, o uso do eugenol com o intuito de diminuir as respostas do estresse não foi satisfatório. Houve elevação no nível de glicose nas densidades 140 e 350g L-1 imediatamente ao término do transporte, e o teor de lactato dos peixes na densidade 245g L-1 aumentou 24 horas depois, indicando que os animais não conseguiram manter a homeostase inicial. Dentre as concentrações de íons avaliados, o magnésio foi o que sofreu maior variação. Podemos concluir que a adição de 15mg L-1 de eugenol na água durante o transporte de juvenis de tilápia do Nilo nas densidades de 140, 245 e 350g L-1 não foi capaz de minimizar as respostas ao estresse.

Abstract in English:

ABSTRACT.- Domingues-F. L.M., Gioso M.A. & Padilha Filho J.G. 2007. Histopathological and histomicrobiological study of root canal therapy medication, comparison of calcium hydroxide versus gutta-percha with zinc oxide/eugenol in the teeth of dogs. Pesquisa Veterinária Brasileira 27(2):71-74. Departamento de Cirurgia da Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando de Marques de Paiva 87, Bloco 8-superior, Cidade Universitária, São Paulo, SP 05508-000, Brazil. E-mail: lesliedf@usp.br The presence of microorganisms in dental structures with experimentally induced necrosis was evaluated. The materials were tested to evaluate their antimicrobial activity and tissue repair efficacy. Four dogs were used in this experiment, with a total of 64 roots of premolar teeth, divided into three groups. The root canals of Group I were filled with gutta-percha and zinc oxide/eugenol cement; Group II were filled with calcium hydroxide, and Group III were not filled. All animals were clinically and radiographically examined 15 days after surgery and then again every subsequent 15 days until 120 days, when the teeth were extracted en bloc. Histopathological analysis showed inflammatory infiltration, cement and bone resorption and necrotic tissue in the apical delta in different proportions. Histomicrobiological analysis showed the presence of microorganisms inside the teeth structures, with different concentrations according to the treatment used. There was statistical significance between the groups (p>0.05). Gutta-percha with zinc oxide/eugenol demonstrated good antimicrobial activity; calcium hydroxide was not efficient. The conclusion of this study is that gutta-percha with zinc oxide/eugenol is the better protocol for filling root canals in dogs.

• Apical delta endodontic gutta-percha calcium hidroxide microorganisms dogs

Abstract in Portuguese:

ABSTRACT.- Domingues-F. L.M., Gioso M.A. & Padilha Filho J.G. 2007. Histopathological and histomicrobiological study of root canal therapy medication, comparison of calcium hydroxide versus gutta-percha with zinc oxide/eugenol in the teeth of dogs. Pesquisa Veterinária Brasileira 27(2):71-74. Departamento de Cirurgia da Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando de Marques de Paiva 87, Bloco 8-superior, Cidade Universitária, São Paulo, SP 05508-000, Brazil. E-mail: lesliedf@usp.br The presence of microorganisms in dental structures with experimentally induced necrosis was evaluated. The materials were tested to evaluate their antimicrobial activity and tissue repair efficacy. Four dogs were used in this experiment, with a total of 64 roots of premolar teeth, divided into three groups. The root canals of Group I were filled with gutta-percha and zinc oxide/eugenol cement; Group II were filled with calcium hydroxide, and Group III were not filled. All animals were clinically and radiographically examined 15 days after surgery and then again every subsequent 15 days until 120 days, when the teeth were extracted en bloc. Histopathological analysis showed inflammatory infiltration, cement and bone resorption and necrotic tissue in the apical delta in different proportions. Histomicrobiological analysis showed the presence of microorganisms inside the teeth structures, with different concentrations according to the treatment used. There was statistical significance between the groups (p>0.05). Gutta-percha with zinc oxide/eugenol demonstrated good antimicrobial activity; calcium hydroxide was not efficient. The conclusion of this study is that gutta-percha with zinc oxide/eugenol is the better protocol for filling root canals in dogs.