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1.
Health Educ Res ; 25(5): 724-36, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-20338978

RESUMO

The purpose of this study was to investigate the benefits of a pedometer and a cognitive-behavioural group intervention for promoting physical activity (PA) in type 2 diabetes patients. We recruited 41 participants and randomized them into an intervention group (IG) (n=20) and a control group (CG) (n = 21). The intervention consisted of five sessions within 12 weeks, a booster session after 22 weeks and a pedometer. Primary outcome was PA assessed by accelerometer (minutes per day) and pedometer (steps per day). Secondary outcomes were weight, body mass index, blood pressure, haemoglobin A1c and total cholesterol. After 12 weeks, the IG increased with more than 2000 steps day(-1) compared with the CG, whereas sedentary behaviour decreased more than 1 hour day(-1) in the IG and showed no change in the CG. There was no intervention effect on the accelerometer-based PA nor on health measurements. After 1 year, the increase in steps per day remained significant in the IG, but sedentary activity increased again to baseline levels. This pilot study showed that the combination of a 12-week cognitive-behavioural intervention and a pedometer has a significant short-term impact on daily steps and sedentary behaviour but that the effects on total PA and long-term effects were limited.


Assuntos
Actigrafia/instrumentação , Diabetes Mellitus Tipo 2 , Exercício Físico , Promoção da Saúde/métodos , Comportamento de Redução do Risco , Comportamento Sedentário , Adulto , Idoso , Bélgica , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação de Programas e Projetos de Saúde/métodos , Inquéritos e Questionários
2.
Transplant Proc ; 41(2): 599-600, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19328935

RESUMO

Persistent hypocalcemia after total parathyroidectomy and autotransplantation is rare and occasionally has been treated using allotransplantation of parathyroid tissue. We present the case of a 32-year-old woman with terminal renal failure who at age 5 years underwent a first renal transplantation from a brain-dead donor. The graft was lost as a result of acute rejection. Tertiary hypoparathyroidism developed, which was treated with total parathyroidectomy and implantation in the forearm of a standardized amount of parathyroid tissue. The graft failed, and hypoparathyroidism developed. Despite a second implantation of cryopreserved autologous tissue, severe hypocalcemia persisted with a tendency for tetany. Although the patient was highly dependent on high-dose vitamin D(3) (tacalcitol) and calcium supplements, regular paresthesias and tetany developed. At age 9 years, the patient underwent a second renal transplant from a living related donor (her mother). After 18 years, the graft was lost as a result of chronic cyclosporine toxicity and angiosclerosis. Four years later, the patient underwent combined kidney and parathyroid transplantation from a local brain-dead donor. Preservation of the parathyroid glands was in University of Wisconsin solution, with cold ischemia time of 14 hours. Directly after the renal transplantation, parathyroid transplantation was performed, with implantation in the forearm of the total amount of donor parathyroid tissue. Postoperatively, there was recovery of parathyroid function, and the patient was able to discontinue vitamin D and calcium supplements after more than 20 years.


Assuntos
Transplante de Rim/fisiologia , Glândulas Paratireoides/transplante , Transplante Homólogo/fisiologia , Adulto , Morte Encefálica , Feminino , Humanos , Hipoparatireoidismo/cirurgia , Doadores de Tecidos , Resultado do Tratamento
3.
Transplant Proc ; 41(2): 585-6, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19328932

RESUMO

Euthanasia was legalized in Belgium in 2002 for adults under strict conditions. The patient must be in a medically futile condition and of constant and unbearable physical or mental suffering that cannot be alleviated, resulting from a serious and incurable disorder caused by illness or accident. Between 2005 and 2007, 4 patients (3 in Antwerp and 1 in Liège) expressed their will for organ donation after their request for euthanasia was granted. Patients were aged 43 to 50 years and had a debilitating neurologic disease, either after severe cerebrovascular accident or primary progressive multiple sclerosis. Ethical boards requested complete written scenario with informed consent of donor and relatives, clear separation between euthanasia and organ procurement procedure, and all procedures to be performed by senior staff members and nursing staff on a voluntary basis. The euthanasia procedure was performed by three independent physicians in the operating room. After clinical diagnosis of cardiac death, organ procurement was performed by femoral vessel cannulation or quick laparotomy. In 2 patients, the liver, both kidneys, and pancreatic islets (one case) were procured and transplanted; in the other 2 patients, there was additional lung procurement and transplantation. Transplant centers were informed of the nature of the case and the elements of organ procurement. There was primary function of all organs. The involved physicians and transplant teams had the well-discussed opinion that this strong request for organ donation after euthanasia could not be waived. A clear separation between the euthanasia request, the euthanasia procedure, and the organ procurement procedure is necessary.


Assuntos
Eutanásia Ativa Voluntária/estatística & dados numéricos , Eutanásia/estatística & dados numéricos , Obtenção de Tecidos e Órgãos/estatística & dados numéricos , Adulto , Bélgica , Ética Médica , Hospitais Universitários , Humanos , Pessoa de Meia-Idade , Coleta de Tecidos e Órgãos/métodos
4.
Prev Vet Med ; 153: 64-70, 2018 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-29653736

RESUMO

A large amount of data is collected routinely in meat inspection in pig slaughterhouses. A time series clustering approach is presented and applied that groups farms based on similar statistical characteristics of meat inspection data over time. A three step characteristic-based clustering approach was used from the idea that the data contain more info than the incidence figures. A stratified subset containing 511,645 pigs was derived as a study set from 3.5 years of meat inspection data. The monthly averages of incidence of pleuritis and of pneumonia of 44 Dutch farms (delivering 5149 batches to 2 pig slaughterhouses) were subjected to 1) derivation of farm level data characteristics 2) factor analysis and 3) clustering into groups of farms. The characteristic-based clustering was able to cluster farms for both lung aberrations. Three groups of data characteristics were informative, describing incidence, time pattern and degree of autocorrelation. The consistency of clustering similar farms was confirmed by repetition of the analysis in a larger dataset. The robustness of the clustering was tested on a substantially extended dataset. This confirmed the earlier results, three data distribution aspects make up the majority of distinction between groups of farms and in these groups (clusters) the majority of the farms was allocated comparable to the earlier allocation (75% and 62% for pleuritis and pneumonia, respectively). The difference between pleuritis and pneumonia in their seasonal dependency was confirmed, supporting the biological relevance of the clustering. Comparison of the identified clusters of statistically comparable farms can be used to detect farm level risk factors causing the health aberrations beyond comparison on disease incidence and trend alone.


Assuntos
Matadouros , Inspeção de Alimentos/estatística & dados numéricos , Carne/normas , Doenças dos Suínos/epidemiologia , Animais , Análise por Conglomerados , Fazendas , Nível de Saúde , Suínos
5.
Acta Gastroenterol Belg ; 81(3): 427-429, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30350533

RESUMO

Cytomegalovirus (CMV) reactivation is a common complication after liver transplantation. In patients with CMV infection, indicated by a positive CMV DNA titer, the presence of any clinical symptom is termed CMV disease. The most common organ affected in CMV disease is the gastrointestinal tract, causing esophagitis, gastritis, enteritis or colitis. CMV infection of the pleura and pericard has been reported in immunocompromised patients, but is rarely seen following liver transplantation.We report a case of a 59-year-old male who developed CMV pleuropericarditis after liver transplantation. Initial ganciclovir treatment did not improve the patient's symptoms and therapy was switched to Foscarnet which ultimately resulted in resolution of infection. However, a few weeks after Foscarnet cessation, the patient again developed bilateral pleural effusion. Ultimate biochemical and clinical response was achieved with IV ganciclovir treatment. The patient was discharged from the hospital with oral Valganciclovir for 3 weeks and has since remained relapse free for >1 year.


Assuntos
Infecções por Citomegalovirus/diagnóstico , Transplante de Fígado , Pericardite/diagnóstico , Pleurisia/diagnóstico , Antivirais/uso terapêutico , Infecções por Citomegalovirus/etiologia , Infecções por Citomegalovirus/terapia , Drenagem , Ganciclovir/uso terapêutico , Rejeição de Enxerto/prevenção & controle , Humanos , Imunossupressores/efeitos adversos , Cirrose Hepática Alcoólica/cirurgia , Masculino , Pessoa de Meia-Idade , Pericardiocentese , Pericardite/etiologia , Pericardite/terapia , Pleurisia/tratamento farmacológico , Pleurisia/etiologia , Toracentese , Tomografia Computadorizada por Raios X
6.
Transplant Proc ; 48(8): 2669-2677, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27788799

RESUMO

BACKGROUND: Donor-related malignancy is a rare complication of organ transplantation. METHODS: In this case series, we discuss three cases of donor-related cancers in kidney transplant recipients who were registered in our center between 1979 and 2015. They account for an incidence of 0.29% of donor-related malignancies of a total of 1015 transplanted kidney grafts (deceased and living donors). The three cases that we describe presented in different ways and with different severity, although the response to the initiated treatment was comparable. RESULTS: All three patients not only survived their cancer episode but also had a complete oncological remission and underwent successful second kidney transplantation, accounting for a 100% survival rate in our small cohort. CONCLUSIONS: Despite the very low incidence of this complication, transplant clinicians must be aware of the occurrence of donor-related malignancies when selecting a donor and should be able to diagnose and treat a case of donor-related cancer.


Assuntos
Neoplasias Renais/etiologia , Transplante de Rim , Doadores de Tecidos , Adulto , Feminino , Sobrevivência de Enxerto , Humanos , Incidência , Neoplasias Renais/epidemiologia , Transplante de Rim/mortalidade , Masculino , Pessoa de Meia-Idade , Reoperação , Transplantados
7.
J Nephrol ; 11(3): 110-22, 1998.
Artigo em Inglês | MEDLINE | ID: mdl-9650119

RESUMO

Leukocyte infiltration in response to I/R injury is a well-known but poorly understood phenomenon. The contribution of neutrophils in this process is still controversial. Despite numerous data, little is known about exact numbers of infiltrating neutrophils. The role of monocytes/macrophages in this process is even more unclear. The role neutrophils in the kidney and other organs was reviewed. The variability in models and methods for neutrophil quantification were examined, along with carrying out a critical overview of depletion and anti-adhesion approaches. Nevertheless, the exact role attributed to neutrophils in the I/R process remains unclear.


Assuntos
Neutrófilos , Traumatismo por Reperfusão , Animais , Humanos , Rim/irrigação sanguínea , Fígado/irrigação sanguínea , Pulmão/irrigação sanguínea , Traumatismo por Reperfusão Miocárdica/fisiopatologia , Neutrófilos/fisiologia , Traumatismo por Reperfusão/fisiopatologia , Especificidade da Espécie
8.
Domest Anim Endocrinol ; 20(3): 165-84, 2001 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11438399

RESUMO

Selection for increased growth rate or decreased back fat thickness results in concomitant changes in endocrine and metabolic status. Growth hormone (GH) changes in blood plasma concentration related to selection for growth rate and fat deposition were reported in pigs. The molecular mechanisms regulating selection-induced changes in GH plasma concentration remain largely unknown. We investigated selection-associated changes in GH axis parameters in 2 pig lines selected for increased growth rate (F-line), or decreased back fat thickness (L-line), respectively. First, we investigated selection-associated changes in GH pulse parameters. In both selection lines we found each generation a declining GH peak maximum concentration and area under the GH curve. GH pulse width was not associated with generation number. In both lines generation number was associated with a declined pulse interval, indicating that the number of pulses per day increased on average with 1 pulse per 24 h per generation. Second, plasma concentration of GH axis related Insulin-like growth factor-I (IGF-I) and insulin were investigated. Plasma IGF-I concentration was not associated with generation number in the F-line. Mean plasma insulin concentration declined each generation in both lines. Third, we investigated changes in GH and Pit-1 mRNA levels. In both selection lines GH and Pit-1 mRNA levels increased approximately 50% each generation. The high SD of the GH mRNA levels in both lines may suggest that the GH mRNA levels are pulsatile in vivo. We postulate a molecular mechanism that may explain how selection is associated with increased GH mRNA levels and GH pulse numbers, while lowering GH release per pulse.


Assuntos
Tecido Adiposo , Hormônio do Crescimento/sangue , Hormônio do Crescimento/genética , Seleção Genética , Suínos/crescimento & desenvolvimento , Suínos/genética , Animais , Composição Corporal/genética , Proteínas de Ligação a DNA/genética , Feminino , Insulina/sangue , Fator de Crescimento Insulin-Like I/análise , Masculino , Periodicidade , Hipófise/química , RNA Mensageiro/análise , Fator de Transcrição Pit-1 , Fatores de Transcrição/genética
9.
J Anim Sci ; 78(1): 69-77, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10682804

RESUMO

Livestock meat production capacity is related to muscle fiber numbers and growth. Muscle fibers develop during early embryonic development from proliferating and differentiating myoblasts. Post-natal muscle growth requires satellite cell proliferation and differentiation. Myoblast and satellite cell proliferation and differentiation is regulated by the genes of the MyoD gene family (myogenin, myf-5, myf-6, and MyoD1). Our aim was to study the mRNA expression of these genes in postnatal muscle tissue in relation to porcine selection for growth rate or leanness. Five boars from a line selected for fast growth (F-line) and five boars from a line selected against backfat thickness (L-line) were slaughtered, and biopsies were taken from 12 muscles. Between-line effects, within-line effects in relation to the performance of the pigs, and muscle-specific effects were studied. Comparing the F-line with the L-line revealed significantly greater myogenin, myf-5, and MyoD1 mRNA expression in some muscles of the F-line. The expression of myf-6 showed a tendency for the opposite effect in some muscles. Muscles were ordered by their muscle-specific growth rate (b-value). Within-line evaluation of the data revealed a systematic muscle effect for the myf-6 expression level in the F-line because higher b-values correlated with increased myf-6 expression level. Backfat thickness was negatively related to myogenin expression in the F-line. A relationship was found between myogenin:MyoD1 mRNA expression ratio and meat color/muscle fiber type composition in the L-line. Furthermore, the myogenin:MyoD1 ratio was greater in muscles from F-line boars than in muscles from L-line boars, which relates to the difference between the lines in muscle fiber type. We conclude that the mRNA levels of the MyoD genes in porcine muscle tissue at slaughter showed different relationships to selection for growth rate when evaluated between selection lines and within selection lines.


Assuntos
Músculos/metabolismo , Proteína MyoD/genética , RNA Mensageiro/biossíntese , Suínos/crescimento & desenvolvimento , Animais , Ensaio de Imunoadsorção Enzimática , Regulação da Expressão Gênica no Desenvolvimento , Masculino , Fibras Musculares Esqueléticas/metabolismo , Proteína MyoD/biossíntese , Reação em Cadeia da Polimerase
10.
J Anim Sci ; 79(7): 1723-33, 2001 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-11465359

RESUMO

Breeding against a production disease is complicated by multiple relationships between productivity, disease, and environment. Ascites in broilers is such a disease. The combination of the reasonably well understood etiology (a physiological/pathological cascade due to inadequate oxygen supply) and the practical relevance makes ascites a relevant case for demonstrating and partly revealing these complex relationships. Chickens (n = 2,788) were tested in an ascites-challenging (cold) environment. Genetic analysis of mortality and pathology in combination with performance and physiological traits (especially blood gas traits) revealed ample opportunities for selection against ascites expression. The genetic correlation structure indicated that different mortality traits and pathology traits roughly represent one common characteristic. Direct selection against pathology is more effective than selection on the basis of growth or blood gas traits. The observed negative correlation (-0.26) between productivity and ascites was unexpected. From the etiology of ascites (inadequate supply of oxygen relative to the demand), a positive (unfavorable) correlation was expected. To demonstrate that the actual disease occurrence caused this apparent contradiction, the data from the undiseased subpopulation were reanalyzed. In the undiseased subpopulation, the genetic correlation between productivity and ascites was positive (0.29). This discrepancy was confirmed by comparing regression of ascites expression on actual performance with regression of ascites on independently assessed performance breeding values. The lability of the genetic correlation was explained from complex interactions between productivity, disease susceptibility, and actual occurrence of the disease. The revealed mechanism can be generalized to other production-related diseases and results in systematically lower genetic correlations between disease and productivity. It was inferred that genetic correlations between productivity and such diseases will always be prone to the demonstrated environmental sensitivity, which complicates index selection against production-related diseases.


Assuntos
Ascite/veterinária , Variação Genética , Doenças das Aves Domésticas/genética , Animais , Ascite/genética , Gasometria/veterinária , Pressão Sanguínea , Peso Corporal , Galinhas , Suscetibilidade a Doenças/veterinária , Meio Ambiente , Abrigo para Animais , Consumo de Oxigênio
11.
J Anim Sci ; 78(5): 1247-54, 2000 May.
Artigo em Inglês | MEDLINE | ID: mdl-10834578

RESUMO

The microstructure of two type of muscles was studied in a selection experiment conducted with Dutch Large White pigs (boars and gilts) selected for either low backfat thickness (L-line) or fast growth (F-line). Second- and fourth-generation pigs were used to determine effects of selection on fiber type composition, fiber area, and capillary density in the longissimus lumborum (LL) and biceps femoris (BF) muscles. Immediately after slaughter samples were taken from the LL and BF muscles. The latter was divided into an inside (BFi) and outside (BFo) portion, which refer to the red and white portions of the biceps femoris. Serial sections were stained for ATPase (pH 4.60), succinate dehydrogenase (SDH), and alpha-amylase-periodic acid shiff (PAS) to determine fiber type and capillary density. The LL and BFo muscles had predominantly type IIBw fibers, whereas the BFi muscle had a 2 to 4 times higher amount of type I fibers. In most muscles there were more type I and fewer type IIBw fibers in F- than in L-line pigs (P < .05), except in the LL muscle of second-generation pigs and in the red part of the BF muscle of fourth-generation pigs. In both selection lines lower type I and higher type IIBw percentages were found in muscles from gilts than in those from boars (P < .05). Capillary density and fiber area of L- and F-lines showed minor differences, which could be explained by differences in weight and age of the pigs of both lines. The results suggest that selection for low backfat thickness in pig breeding compared with increased growth rate resulted in fewer oxidative and more glycolytic muscle fibers. The magnitude of the effect depended on muscle type and duration of the selection period.


Assuntos
Desenvolvimento Muscular , Seleção Genética , Suínos/crescimento & desenvolvimento , Adenosina Trifosfatases/metabolismo , Animais , Estudos Transversais , Feminino , Processamento de Imagem Assistida por Computador , Masculino , Fibras Musculares Esqueléticas/fisiologia , Suínos/anatomia & histologia , Suínos/genética
12.
J Anim Sci ; 81(3): 594-603, 2003 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-12661638

RESUMO

The objective of this study was to investigate whether nursing a large number of piglets has negative effects on lactation and postweaning performance of primiparous sows and whether a greater lactation feed intake can prevent possible negative effects. Data were recorded on 268 ad libitum-fed sows of three genotypes (G1, G2, and G3) in an experiment where litter size was standardized to 8, 11, or 14 piglets during a 4-wk lactation. Compared to G1 and G2, G3 sows were heavier (P < 0.05) and leaner (P < 0.05) at weaning of their litters, lost similar amounts of BW and backfat, and their piglets grew faster (P < 0.05). Compared to G1, feed intake during lactation was higher for G3 sows (P < 0.05), and their risk of a prolonged weaning-to-estrus interval was lower (P < 0.01). Daily feed intake by sows was not affected by litter size in G1 and G3, but it was quadratically affected in G2 (P < 0.05), with a maximum at 10.8 piglets. Backfat loss of the sows increased linearly with litter size (P < 0.05) in G1 and G3. In G2, backfat loss increased only at litter sizes > 9.8 piglets (P < 0.01). Body weight loss of the sow and litter weight gain increased linearly with litter size (P < 0.001). Per extra piglet nursed, sows had a 23% (P < 0.01) higher probability of a prolonged weaning-to-estrus interval. A higher daily feed intake during lactation reduced tissue loss of the sow, increased litter weight gain (P < 0.01), and reduced the probability of a prolonged weaning-to-estrus interval (by 42% per extra kilogram; P < 0.01). Sows with a lower daily body weight loss during first lactation had a larger second litter (1.28 piglets/kg; P < 0.01), and their probability of a prolonged weaning-to-estrus interval was reduced by 61% per kilogram (P < 0.001). With increasing litter size, it is therefore recommended to reduce body weight loss during lactation by stimulating daily feed intake and by genetic selection.


Assuntos
Ingestão de Energia/fisiologia , Lactação/fisiologia , Tamanho da Ninhada de Vivíparos/fisiologia , Suínos/fisiologia , Tecido Adiposo/metabolismo , Animais , Animais Lactentes/crescimento & desenvolvimento , Constituição Corporal , Estro/fisiologia , Feminino , Genótipo , Paridade , Distribuição Aleatória , Suínos/genética , Fatores de Tempo , Desmame , Redução de Peso
13.
J Anim Sci ; 68(5): 1193-200, 1990 May.
Artigo em Inglês | MEDLINE | ID: mdl-2365637

RESUMO

Effects of recombinant porcine somatotropin (rpST) on growth, lean tissue growth, feed intake, feed conversion, lean tissue feed conversion, backfat thickness and lean percentage were examined in 96 growing pigs. The experiment used barrows and gilts from the genotypes Duroc, F1 (Dutch Yorkshire x Dutch Landrace) and Pietrain. Half the pigs received 14 mg rpST i.m. twice each week starting at 60 kg; others received a placebo. Pigs had ad libitum access to a diet containing 2,162 kcal net energy and 182 g crude protein per kilogram and were slaughtered at either 100 or 140 kg live weight. From 60 to 100 and from 100 to 140 kg, live weight responses to rpST averaged as follows: daily gain, +4.5 and +19.9%; feed intake, -4.4 and +3.5%; feed conversion, -8.4 and -13.9%; backfat thickness, -13.8 and -22.8%; lean percentage, +4.4 and +8.7%; lean tissue growth rate, +8.6 and +35.8%; and lean tissue feed conversion, -13.1 and -24.9%. No gender x rpST interaction was detected. However, a genotype x treatment interaction was significant for backfat thickness at both slaughter weights, showing a higher response to rpST in Duroc than in Pietrain and F1. Growth performance was improved more by rpST in F1 and Pietrain than in Duroc, especially at higher weights, but carcass traits were improved more by rpST in Duroc. The response to rpST in lean tissue growth rate from 60 to 100 kg was highest in fatter animals (Duroc, barrows), whereas from 100 to 140 kg, response in lean tissue growth rate to rpST was highest in leaner animals (Pietrain, F1, gilts).


Assuntos
Peso Corporal/efeitos dos fármacos , Hormônio do Crescimento/farmacologia , Suínos/crescimento & desenvolvimento , Animais , Ingestão de Alimentos/efeitos dos fármacos , Feminino , Genótipo , Análise dos Mínimos Quadrados , Masculino , Proteínas Recombinantes/farmacologia , Fatores Sexuais , Suínos/genética
14.
Meat Sci ; 56(4): 397-402, 2000 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22062170

RESUMO

The objective in this study was to examine the capillary supply in the broiler breast muscle in relation to productivity and the incidence of ascites. Muscle samples (pectoralis superficialis) were collected from 24 pairs of broilers of a commercial paternal strain. The pairs consisted of full sib broilers (brothers and sisters). Of each pair one broiler had a high arterial pressure index, as an indication of ascites, and the other was a healthy chick of the same sex. Data collected were, among others, body weight, arterial pressure index, haematocrit and weight of breast muscle and lungs. Pectoral muscle samples were histologically analysed with respect to capillary density, fibre area and number of capillaries per fibre. Ascitic chickens (measured as high values for heart hypertrophy) had a lower number of capillaries per fibre and tended to have reduced fibre area, although they had a similar capillary density in the pectoral muscle in comparison with healthy chickens. The expected increase in capillary density was not observed. Normally capillary densities decrease in proportion to the increase in fibre size. So ascites has unfavourable relations with capillary traits. Fast growth was not significantly associated with capillary density. However, chickens with a higher percentage breast muscle had a lower capillary density. This implies that high muscularity might be a risk for a diminished oxygen supply to the breast muscle.

15.
Poult Sci ; 80(1): 13-21, 2001 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-11214331

RESUMO

Within-line opportunities for selection against ascites were studied in a data set comprising a 10-line comparison. The study attempted to reveal whether contrasts between lines provide reliable candidate traits for within-line selection. Mortality was chosen as the reference trait. As no pedigree information was available, a trait was required that related mortality to the nonmortality data. By principal component analysis, such a trait (ASC_INDIC = ascites indicator) was developed from pathology data. The composite trait ASC_INDIC ranked lines well for their mortality figures (r = 0.96), from which it was concluded that ASC_INDIC represents an underlying continuous ascites trait. Between lines, blood gas traits seemed to be the most promising traits. Within lines, performance traits appeared to be highly correlated to ascites. Comparison of within-line variation to between-line contrasts revealed considerable differences. The high correlation of the blood gas traits with mortality was not present within lines. However, although the magnitude was considerably reduced, the nature of the blood gas traits in their relationship to ascites was similar within and between lines. The study primarily demonstrates that contrasts between lines carry systematic but limited information for within-line coherence. Therefore, line contrasts must be interpreted with care when aiming to study genetic variation and coherence within lines.


Assuntos
Ascite/genética , Ascite/veterinária , Galinhas/genética , Seleção Genética , Criação de Animais Domésticos , Animais , Variação Genética , Endogamia , Masculino
16.
Poult Sci ; 81(4): 472-80, 2002 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-11989746

RESUMO

Two experiments of similar design were conducted with male broiler chickens over two body weight ranges, 200 to 800 g in Experiment 1 and 800 to 1,600 g in Experiment 2. The data were used to test the hypothesis that protein deposition rate increases (linearly) with increasing amino acid intake, until energy intake becomes limiting for protein deposition rate. Additional amino acid intake above this point would be deposited less efficiently. An increase in energy intake would increase lipid deposition rate, but should, at low amino acid intakes, not affect protein deposition rate. Each experiment consisted of 18 treatments: two levels of protein-free energy (energy(pf)) intake, combined with nine amino acid to energypf ratios. Protein was balanced for amino acid content and lysine was the first limiting amino acid in the diet. Protein deposition rate increased with additional amino acid intake. No evidence was found that energy(pf) intake limited protein deposition rate at high amino acid intake. Extra intake of energy(pf) increased lipid deposition rate, which was independent of amino acid intake. Where amino acid intake was limiting, additional intake of energy(pf) had generally no effect on protein deposition rate. The marginal efficiency of amino acid utilization for protein deposition did not depend on body weight. The facts are relevant to the modeling of the growth of broiler chickens.


Assuntos
Aminoácidos/administração & dosagem , Galinhas/metabolismo , Ingestão de Energia , Metabolismo Energético/fisiologia , Metabolismo dos Lipídeos , Proteínas/metabolismo , Aminoácidos/metabolismo , Animais , Peso Corporal , Galinhas/fisiologia , Proteínas Alimentares/administração & dosagem , Proteínas Alimentares/metabolismo , Digestão , Ingestão de Energia/fisiologia , Lisina/metabolismo , Masculino , Aumento de Peso
17.
Vet Q ; 24(1): 29-34, 2002 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-11924559

RESUMO

Disease is a major issue in animal production systems and society demands that the use of medicines and vaccines be reduced. This review describes the breeding approaches that could be used to improve disease resistance and focuses especially on their application to pigs. Disease reduction by genetic means has certain advantages through cumulative and permanent effects, and direct and indirect selection methods are available. Direct selection for disease incidence requires, besides a unique pig identification and disease registration system, challenge routines that are inconvenient in intensive pig production. Indirect selection for the expression of immune capacity may be an alternative but requires detailed knowledge of the different components of the immune system. There is ample opportunity for genetic improvement of the immune capacity because immune traits show substantial genetic variation between pigs. We therefore conclude that indirect selection via immune traits is very interesting, also for practical implementation, and that there is an urgent need for knowledge, within lines, about the genetic relationships between immune capacity traits and resistance to specific diseases or to disease incidence in general. Furthermore, knowledge about the relationship between immune system traits and production traits is needed as well as knowledge about the effect of selection on the epidemiology of disease at a farm/population level and on the host-pathogen interaction and coevolution.


Assuntos
Imunidade Inata , Seleção Genética , Doenças dos Suínos/genética , Doenças dos Suínos/imunologia , Suínos , Animais , Marcadores Genéticos , Sistema Imunitário/fisiologia , Incidência , Reprodução , Doenças dos Suínos/epidemiologia
18.
Acta Chir Belg ; 104(4): 454-6, 2004 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-15469162

RESUMO

Fifteen years after aortobifemoral bypass and five years after left femoropopliteal bypass, a 73-year old man presented with a vague abdominal pain syndrome. After an extensive work-up, aortobifemoral graft infection was suspected; an appendiceal abscess infiltrating the prosthesis was discovered during exploratory laparotomy. Appendectomy was performed followed by removal of the vascular graft, the latter being replaced by a bilateral axillofemoral prosthesis. Aortic graft infection from appendicitis is an extremely rare condition; a review of similar cases is presented.


Assuntos
Aorta/cirurgia , Apendicite/complicações , Prótese Vascular/microbiologia , Artéria Femoral/cirurgia , Artéria Poplítea/cirurgia , Dor Abdominal/etiologia , Doença Aguda , Idoso , Humanos , Masculino , Síndrome , Fatores de Tempo
19.
Animal ; 8(12): 2016-26, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25166468

RESUMO

The sustainability of breeding activities in 15 pig farming systems in five European countries was evaluated. One conventional and two differentiated systems per country were studied. The Conventional systems were the standard systems in their countries. The differentiated systems were of three categories: Adapted Conventional with focus on animal welfare, meat quality or environment (five systems); Traditional with local breeds in small-scale production (three systems) and Organic (two systems). Data were collected with a questionnaire from nine breeding organisations providing animals and semen to the studied farming systems and from, on average, five farmers per farming system. The sustainability assessment of breeding activities was performed in four dimensions. The first dimension described whether the market for the product was well defined, and whether the breeding goal reflected the farming system and the farmers' demands. The second dimension described recording and selection procedures, together with genetic change in traits that were important in the system. The third dimension described genetic variation, both within and between pig breeds. The fourth dimension described the management of the breeding organisation, including communication, transparency, and technical and human resources. The results show substantial differences in the sustainability of breeding activities, both between farming systems within the same category and between different categories of farming systems. The breeding activities are assessed to be more sustainable for conventional systems than for differentiated systems in three of the four dimensions. In most differentiated farming systems, breeding goals are not related to the system, as these systems use the same genetic material as conventional systems. The breeds used in Traditional farming systems are important for genetic biodiversity, but the small scale of these systems renders them vulnerable. It is hoped that, by reflecting on different aspects of sustainability, this study will encourage sustainable developments in pig production.


Assuntos
Criação de Animais Domésticos/normas , Bem-Estar do Animal , Cruzamento , Conservação dos Recursos Naturais/métodos , Suínos/genética , Suínos/fisiologia , Criação de Animais Domésticos/métodos , Animais , Europa (Continente) , Variação Genética , Humanos
20.
Animal ; 8(12): 2038-46, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25196445

RESUMO

A market conformity tool, based on technological meat quality parameters, was developed within the Q-PorkChains project, to be included in a global sustainability evaluation of pig farming systems. The specific objective of the market conformity tool was to define a scoring system based on the suitability of meat to elaborate the main pork products, according to their market shares based on industry requirements, in different pig farming systems. The tool was based on carcass and meat quality parameters that are commonly used for the assessment of technological quality, which provide representative and repeatable data and are easily measurable. They were the following: cold carcass weight; lean meat percentage; minimum subcutaneous back fat depth at m. gluteus medius level, 45 postmortem and ultimate pH (measured at 24-h postmortem) in m. longissimus lumborum and semimembranosus; meat colour; drip losses and intramuscular fat content in a m. longissimus sample. Five categories of pork products produced at large scale in Europe were considered in the study: fresh meat, cooked products, dry products, specialties and other meat products. For each of the studied farming systems, the technological meat quality requirements, as well as the market shares for each product category within farming system, were obtained from the literature and personal communications from experts. The tool resulted in an overall conformity score that enabled to discriminate among systems according to the degree of matching of the achieved carcass and meat quality with the requirements of the targeted market. In order to improve feasibility, the tool was simplified by selecting ultimate pH at m. longissimus or semimembranosus, minimum fat thickness measured at the left half carcass over m. gluteus medius and intramuscular fat content in a m. longissimus sample as iceberg indicators. The overall suitability scores calculated by using both the complete and the reduced tools presented good correlation and the results obtained were similar. The tool could be considered as robust enough to discriminate among different systems, since it was tested in a wide range of them. It also can be used to detect improvement opportunities to enhance sustainability of pig farming systems. The final objective of the study was achieved, since the market suitability tool could be used in an integrated sustainability analysis of pig farming systems.


Assuntos
Criação de Animais Domésticos/métodos , Criação de Animais Domésticos/normas , Conservação dos Recursos Naturais/métodos , Carne/normas , Animais , Peso Corporal , Culinária , Europa (Continente) , Músculo Esquelético/fisiologia , Fenótipo , Suínos
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