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1.
Semina Ci. agr. ; 39(6): 2465-2476, nov.-dez. 2018. tab
Artigo em Inglês | VETINDEX | ID: vti-738696

Resumo

Important physiological changes affect the blood profile of ruminants during the growth phase, but few studies approach the factors involved in these dynamics in lambs. The aim of this study was to characterize the dynamics of hematological parameters, of total plasma protein (TPP), and of fibrinogen in healthy female lambs during the first four months of life. Blood samples of 35 female lambs were collected at 30, 60, 90, and 120 days old to perform the complete blood count (CBC). The erythrocyte and leukocyte parameters, TPP, and fibrinogen were determined. The means for total red blood cell (RBC) counts at 60 and 120 days differed (P < 0.05) from the initial mean, showing a peak of 13.6 x 106 cells μL-1 at 60 days old. The mean values for packed cell volume (PCV) and hemoglobin (Hgb) concentration increased (P < 0.05) until 90 days and decreased at 120 days (36.6% to 33.7% and 11.4 g dL-1 to 10.6 g dL-1 between 90 and 120 days, respectively). The means for mean corpuscular volume (MCV) and for mean corpuscular hemoglobin concentration (MCHC) increased (P < 0.05) between 30 and 120 days (27.5 μm3 to 29.7 μm3 and 26.6% to 31.4%, respectively). The total white blood cell (WBC) count increased (P < 0.05) and reached a peak at 90 days (9,314 cells μL-1). The peaks for segmented neutrophils (5,141 cells μL-1) and lymphocyte counts (4,236 cells μL-1) occurred at 60 and 90 days, respectively. The means for neutrophil/lymphocyte ratio were similar (P > 0.05) between the ages (mean of 1.8) but higher than the reference value for adult sheep (0.5). The initial mean for eosinophil counts (2 cells μL-1) was lower (P < 0.05) than all subsequent ones, and the monocyte count showed the lowest level (P < 0.05) at 120 days (232 cells μL-1). The mean for TPP at 60 days (6.4 g dL-1) was higher (P < 0.05) than the other ages.(AU)


Important physiological changes affect the blood profile of ruminants during the growth phase, but few studies approach the factors involved in these dynamics in lambs. The aim of this study was to characterize the dynamics of hematological parameters, of total plasma protein (TPP), and of fibrinogen in healthy female lambs during the first four months of life. Blood samples of 35 female lambs were collected at 30, 60, 90, and 120 days old to perform the complete blood count (CBC). The erythrocyte and leukocyte parameters, TPP, and fibrinogen were determined. The means for total red blood cell (RBC) counts at 60 and 120 days differed (P < 0.05) from the initial mean, showing a peak of 13.6 x 106 cells μL-1 at 60 days old. The mean values for packed cell volume (PCV) and hemoglobin (Hgb) concentration increased (P < 0.05) until 90 days and decreased at 120 days (36.6% to 33.7% and 11.4 g dL-1 to 10.6 g dL-1 between 90 and 120 days, respectively). The means for mean corpuscular volume (MCV) and for mean corpuscular hemoglobin concentration (MCHC) increased (P < 0.05) between 30 and 120 days (27.5 μm3 to 29.7 μm3 and 26.6% to 31.4%, respectively). The total white blood cell (WBC) count increased (P < 0.05) and reached a peak at 90 days (9,314 cells μL-1). The peaks for segmented neutrophils (5,141 cells μL-1) and lymphocyte counts (4,236 cells μL-1) occurred at 60 and 90 days, respectively. The means for neutrophil/lymphocyte ratio were similar (P > 0.05) between the ages (mean of 1.8) but higher than the reference value for adult sheep (0.5). The initial mean for eosinophil counts (2 cells μL-1) was lower (P < 0.05) than all subsequent ones, and the monocyte count showed the lowest level (P < 0.05) at 120 days (232 cells μL-1). The mean for TPP at 60 days (6.4 g dL-1) was higher (P < 0.05) than the other ages.(AU)


Assuntos
Animais , Feminino , Ovinos/sangue , Ovinos/crescimento & desenvolvimento , Padrões de Referência , Fibrinogênio , Neutrófilos , Fatores Etários , Contagem de Eritrócitos/veterinária , Contagem de Leucócitos/veterinária , Contagem de Linfócitos/veterinária , Testes Hematológicos/veterinária
2.
R. bras. Parasitol. Vet. ; 25(4): 504-510, Sept.-Dec. 2016. mapas, tab
Artigo em Inglês | VETINDEX | ID: vti-744070

Resumo

Neighborhood dogs may act as reservoirs for several zoonotic protozoan infections, particularly in urban areas, thus constituting a potential public health threat. Accordingly, the aim of the present study was to evaluate the exposure of neighborhood dogs to four protozoan pathogens in public areas with high levels of human movement in Curitiba, southern Brazil. Blood samples from 26 neighborhood dogs were screened by means of the indirect immunofluorescent antibody test (IFAT) for Leishmania spp., Toxoplasma gondii, Trypanosoma cruzi and Neospora caninum, and a questionnaire was answered by the respective keeper. A total of 8/26 dogs (30.7%) seroreactive to T. gondii, 3/26 (11.5%) to N. caninum and 2/26 (7.7%) to both were identified. All the samples were seronegative for T. cruzi and Leishmania spp. Pathogen seroreactivity was not associated with the daily human movements or other epidemiological variables investigated (p > 0.05). In conclusion, the low seroprevalence for T. gondii and N. caninum indicated low environmental and food risk for animal infection and the seronegativity for Leishmania spp. and T. cruzi may reflect the absence of these pathogens in urban areas of Curitiba. Moreover, neighborhood dogs may be used as environmental sentinels for the presence of protozoan pathogens and their vectors.(AU)


Cães comunitários podem atuar como reservatórios para algumas zoonoses causadas por protozoários, principalmente em áreas urbanas, constituindo potencial ameaça à saúde pública. Portanto, o objetivo do presente estudo foi avaliar a exposição de cães comunitários a quatro protozoários em áreas públicas com alta circulação de pessoas, em Curitiba, Sul do Brasil. Amostras de sangue de 26 cães comunitários foram testadas pela reação de imunofluorescência indireta (RIFI) para Leishmania spp., Toxoplasma gondii, Trypanosoma cruzi e Neospora caninum, e um questionário foi respondido pelo respectivo mantenedor. Um total de 8/26 (30,7%) foram sororreagentes para T. gondii, 3/26 (11,5%) para N. caninum e 2/26 (7,7%) para ambos. Todas as amostras foram soronegativas para T. cruzi e Leishmania spp. Não houve associação entre sororreatividade para os patógenos pesquisados e o tráfego diário de pessoas e outras variáveis epidemiológicas analisadas (p > 0.05). Conclui-se a baixa soroprevalência para T. gondii e T. cruzi indica baixo risco ambiental e alimentar para a infecção dos animais, e a soronegatividade para Leishmania spp. e T. cruzi pode refletir a ausência desses patógenos em áreas urbanas de Curitiba. Além disso, os cães comunitários podem atuar como sentinelas ambientais quanto à presença de protozoários e seus vetores.(AU)


Assuntos
Animais , Cães , Leishmania/imunologia , Leishmania/isolamento & purificação , Neospora/imunologia , Neospora/isolamento & purificação , Toxoplasma/imunologia , Toxoplasma/isolamento & purificação , Trypanosoma cruzi/imunologia , Trypanosoma cruzi/isolamento & purificação , Toxoplasmose Animal/imunologia , Toxoplasmose Animal/parasitologia , Estudos Soroepidemiológicos , Anticorpos Antiprotozoários/sangue , Brasil , Reservatórios de Doenças/parasitologia
3.
R. bras. Saúde Prod. Anim. ; 14(3): 396-405, July.-Sept.2013. tab
Artigo em Português | VETINDEX | ID: vti-715280

Resumo

The objective was to analyze production costs and profitability of grazing sheep productions systems under three strategies of lambs supplementation: (1) white clover on creep grazing; (2) creep feeding; and (3) not supplemented. Two methods of financial analyses where used: annual (short term) and cash flow (long term). Costs were classified into variable, fixed, operational and total. Results showed that feeding and opportunity cost over investment was the most important production factors at variable and total costs, respectively. System with creep grazing supplementation did not show greater economic financial results over creep feeding supplementation system.(AU)


Objetivou-se analisar os custos e a rentabilidade de sistemas de produção de ovinos em pastagem sob três estratégias de suplementação de cordeiros lactentes: (1) creep grazing de trevo branco; (2) creep feeding; e (3) sem suplementação. Utilizaram-se dois métodos de análise financeira: análise anual (de curto prazo) e de fluxo de caixa (de longo prazo). Os custos foram segmentados em variáveis, fixos, operacionais e totais. O fator de produção que exerceu maior influência no custo variável da produção foi a alimentação, e no custo total foi o custo de oportunidade do capital imobilizado. O sistema com creep grazing não apresentou resultados econômico-financeiros superiores aos com creep feeding.(AU)


Assuntos
Animais , Ovinos/classificação , Ovinos/crescimento & desenvolvimento , Pastagens/análise , Pastagens/economia , Indústria Agropecuária/análise , Indústria Agropecuária/economia , Desmame
4.
Rev. bras. saúde prod. anim ; 14(3): 396-405, July.-Sept.2013. tab
Artigo em Português | VETINDEX | ID: biblio-1493243

Resumo

The objective was to analyze production costs and profitability of grazing sheep productions systems under three strategies of lambs supplementation: (1) white clover on creep grazing; (2) creep feeding; and (3) not supplemented. Two methods of financial analyses where used: annual (short term) and cash flow (long term). Costs were classified into variable, fixed, operational and total. Results showed that feeding and opportunity cost over investment was the most important production factors at variable and total costs, respectively. System with creep grazing supplementation did not show greater economic financial results over creep feeding supplementation system.


Objetivou-se analisar os custos e a rentabilidade de sistemas de produção de ovinos em pastagem sob três estratégias de suplementação de cordeiros lactentes: (1) creep grazing de trevo branco; (2) creep feeding; e (3) sem suplementação. Utilizaram-se dois métodos de análise financeira: análise anual (de curto prazo) e de fluxo de caixa (de longo prazo). Os custos foram segmentados em variáveis, fixos, operacionais e totais. O fator de produção que exerceu maior influência no custo variável da produção foi a alimentação, e no custo total foi o custo de oportunidade do capital imobilizado. O sistema com creep grazing não apresentou resultados econômico-financeiros superiores aos com creep feeding.


Assuntos
Animais , Indústria Agropecuária/análise , Indústria Agropecuária/economia , Ovinos/classificação , Ovinos/crescimento & desenvolvimento , Pastagens/análise , Pastagens/economia , Desmame
5.
Semina ciênc. agrar ; 39(6): 2465-2476, 2018. tab
Artigo em Inglês | VETINDEX | ID: biblio-1501287

Resumo

Important physiological changes affect the blood profile of ruminants during the growth phase, but few studies approach the factors involved in these dynamics in lambs. The aim of this study was to characterize the dynamics of hematological parameters, of total plasma protein (TPP), and of fibrinogen in healthy female lambs during the first four months of life. Blood samples of 35 female lambs were collected at 30, 60, 90, and 120 days old to perform the complete blood count (CBC). The erythrocyte and leukocyte parameters, TPP, and fibrinogen were determined. The means for total red blood cell (RBC) counts at 60 and 120 days differed (P 0.05) between the ages (mean of 1.8) but higher than the reference value for adult sheep (0.5). The initial mean for eosinophil counts (2 cells μL-1) was lower (P < 0.05) than all subsequent ones, and the monocyte count showed the lowest level (P < 0.05) at 120 days (232 cells μL-1). The mean for TPP at 60 days (6.4 g dL-1) was higher (P < 0.05) than the other ages.


Important physiological changes affect the blood profile of ruminants during the growth phase, but few studies approach the factors involved in these dynamics in lambs. The aim of this study was to characterize the dynamics of hematological parameters, of total plasma protein (TPP), and of fibrinogen in healthy female lambs during the first four months of life. Blood samples of 35 female lambs were collected at 30, 60, 90, and 120 days old to perform the complete blood count (CBC). The erythrocyte and leukocyte parameters, TPP, and fibrinogen were determined. The means for total red blood cell (RBC) counts at 60 and 120 days differed (P 0.05) between the ages (mean of 1.8) but higher than the reference value for adult sheep (0.5). The initial mean for eosinophil counts (2 cells μL-1) was lower (P < 0.05) than all subsequent ones, and the monocyte count showed the lowest level (P < 0.05) at 120 days (232 cells μL-1). The mean for TPP at 60 days (6.4 g dL-1) was higher (P < 0.05) than the other ages.


Assuntos
Feminino , Animais , Fatores Etários , Fibrinogênio , Neutrófilos , Ovinos/crescimento & desenvolvimento , Ovinos/sangue , Padrões de Referência , Contagem de Eritrócitos/veterinária , Contagem de Leucócitos/veterinária , Contagem de Linfócitos/veterinária , Testes Hematológicos/veterinária
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