34 research outputs found
Coping with adversity: Resilience dynamics of livestock farmers in two agroecological zones of Ghana
Despite the increasing occurrence of adverse events including droughts and conflicts, livestock farmers in Ghana continue to raise animals to support their livelihoods and the national economy. We assessed the resilience of cattle farmers (CF) to adverse events they faced using a cross-sectional survey of 287 CF in two agroecological zones in Ghana. Resilience to adversities was assessed using the Resilience Scale (RS-14). Resilience scores and categories were computed and factors that explained variations in resilience categories assessed. The farmers kept, on average, 31 cattle per household, with a majority (91%) also growing crops. Key adverse events confronting them in both districts were animal disease outbreaks, pasture shortages, and theft, with 85% (240/287) losing, on average, seven cattle (15% of the herd size) over a one-year period. The mean resilience score was 71 (SD = 8) out of 98; 52% were highly resilient. Resilience was higher in the southern district (72 versus 70), albeit not statistically significant (p = 0.06). The resilience significantly improved with age, each unit increase in cattle in the herd, and having experience raising livestock (p < 0.001). The CF have relatively high resilience to adverse events affecting their productivity. The findings provide relevant information for implementing mitigation measures to improve production by reducing animal mortalities through high-quality veterinary services
Shock-Induced Turbulent Boundary Layer Separation in Over-Expanded Rocket Nozzles: Physics, Models, Random Side Loads, and the Diffusive Character of Stochastic Rocket Ascent
Age influence on effectiveness of a novel 3-phytase in barley-wheat based diets for pigs from 12 to 108 kg under commercial conditions
[EN] The main objective of this study was to evaluate the influence of pig's age on the effectiveness of a new microbial 3-phytase, produced by Komagataella phaffii, under commercial conditions in barley-wheat based diets. Two experiments were conducted in weaned, growing and finishing pigs; firstly, to determine phytase efficacy on dry matter, organic matter, energy, protein and mineral (phosphorus, P and calcium, Ca) digestibility (n = 48; Experiment 1), and secondly, to evaluate the effect of phytase on growth performance and bone mineralization (n = 312; Experiment 2). In each experiment, three barley-wheat based diets were formulated following the recommendations for each animal age, of which two versions were manufactured, including 0 and 1000 phytase units (FTU)/kg of feed of the new 3-phytase to be tested. Results showed the new phytase had the potential to increase the digestibility of Ca and P (on av. + 0.05 and +0.06, respectively; P < 0.01), especially P digestibility in growing pigs (+0.10; P < 0.001), consequently decreasing P and Ca excretion. Digestible energy (DE) of the diet increased with the addition of phytase in weaned pigs (+0.69 MJ/kg of dry matter (DM); P < 0.001). Dietary inclusion of new 3-phytase enhanced average daily gain from 46 to 94 days of age (+0.07 kg/d; P < 0.05) and decreased feed conversion ratio from 46 to 154 days of age (on av. -0.13; P < 0.05), although no significant effect was observed from 154 to 185 days of age. Addition of the new 3-phytase also promoted bone mineralization, increasing the weight of the bones (+3.99 and +3.64 g of tibia at 95 days and metacarpus at 100 days of age, respectively; P < 0.05) and the ash, Ca and P content in these bones (e.g. + 0.46 and +0.33 g of P in tibia at 95 days and metacarpus at 100 days of age, respectively; P < 0.001). In conclusion, pig age affected the efficacy of a new 3-phytase on P and Ca digestibility both in weaned and growing diets and DE content of the weaned diets, which also resulted in improvements in growth, feed conversion and bone development until 154 days of age. These effects seem to be reduced during the finishing period, although the advantages of the new 3-phytase on bone mineralization were maintained until 185 days of age.We thank the technical staff at the experimental farms of the Research and Technology Animal Centre (CITA-IVIA), the Institute of
Animal Science and Technology (Universitat Politècnica de Valencia) and Javier Gómez (Crianzas Campovivo) for expert technical
assistance and experimental support.Cambra López, M.; Cerisuelo, A.; Ferrer, P.; Ródenas Martínez, L.; Aligué, R.; Moset, V.; Pascual Amorós, JJ. (2020). Age influence on effectiveness of a novel 3-phytase in barley-wheat
based diets for pigs from 12 to 108 kg under commercial conditions. Animal Feed Science and Technology. 267:1-13. https://doi.org/10.1016/j.anifeedsci.2020.114549S113267Adeola, O., & Cowieson, A. J. (2011). BOARD-INVITED REVIEW: Opportunities and challenges in using exogenous enzymes to improve nonruminant animal production. Journal of Animal Science, 89(10), 3189-3218. doi:10.2527/jas.2010-3715Almeida, F. N., Sulabo, R. C., & Stein, H. H. (2013). Effects of a novel bacterial phytase expressed in Aspergillus Oryzae on digestibility of calcium and phosphorus in diets fed to weanling or growing pigs. Journal of Animal Science and Biotechnology, 4(1). doi:10.1186/2049-1891-4-8Arredondo, M. A., Casas, G. A., & Stein, H. H. (2019). Increasing levels of microbial phytase increases the digestibility of energy and minerals in diets fed to pigs. Animal Feed Science and Technology, 248, 27-36. doi:10.1016/j.anifeedsci.2019.01.001Atakora, J. K. A., Moehn, S., Sands, J. S., & Ball, R. O. (2011). Effects of dietary crude protein and phytase–xylanase supplementation of wheat grain based diets on energy metabolism and enteric methane in growing finishing pigs. Animal Feed Science and Technology, 166-167, 422-429. doi:10.1016/j.anifeedsci.2011.04.030Blaabjerg, K., Nørgaard, J. V., & Poulsen, H. D. (2012). Effect of microbial phytase on phosphorus digestibility in non-heat-treated and heat-treated wheat–barley pig diets1. Journal of Animal Science, 90(suppl_4), 206-208. doi:10.2527/jas.53920Brady, S., Callan, J., Cowan, D., McGrane, M., & O’Doherty, J. (2002). Effect of phytase inclusion and calcium/phosphorus ratio on the performance and nutrient retention of grower-finisher pigs fed barley/wheat/soya bean meal-based diets. Journal of the Science of Food and Agriculture, 82(15), 1780-1790. doi:10.1002/jsfa.1262Braña, D. V., Ellis, M., Castañeda, E. O., Sands, J. S., & Baker, D. H. (2006). 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H. (2015). Effects of microbial phytase on apparent and standardized total tract digestibility of calcium in calcium supplements fed to growing pigs1. Journal of Animal Science, 93(5), 2255-2264. doi:10.2527/jas.2014-8215Harper, A. F., Kornegay, E. T., & Schell, T. C. (1997). Phytase supplementation of low-phosphorus growing-finishing pig diets improves performance, phosphorus digestibility, and bone mineralization and reduces phosphorus excretion. Journal of Animal Science, 75(12), 3174. doi:10.2527/1997.75123174xHaug, W., & Lantzsch, H.-J. (1983). Sensitive method for the rapid determination of phytate in cereals and cereal products. Journal of the Science of Food and Agriculture, 34(12), 1423-1426. doi:10.1002/jsfa.2740341217Heaney, R. P., Abrams, S., Dawson-Hughes, B., Looker, A., Looker, A., Marcus, R., … Weaver, C. (2001). Peak Bone Mass. Osteoporosis International, 11(12), 985-1009. doi:10.1007/s001980070020Jørgensen, B. (1995). Effect of different energy and protein levels on leg weakness and osteochondrosis in pigs. Livestock Production Science, 41(2), 171-181. doi:10.1016/0301-6226(94)00048-cKemme, P. A., Jongbloed, A. W., Mroz, Z., & Beynen, A. C. (1997). The efficacy of Aspergillus niger phytase in rendering phytate phosphorus available for absorption in pigs is influenced by pig physiological status. Journal of Animal Science, 75(8), 2129. doi:10.2527/1997.7582129xKiela, P. R., & Ghishan, F. K. (2016). Physiology of Intestinal Absorption and Secretion. Best Practice & Research Clinical Gastroenterology, 30(2), 145-159. doi:10.1016/j.bpg.2016.02.007Kim, J. C., Simmins, P. H., Mullan, B. P., & Pluske, J. R. (2005). The effect of wheat phosphorus content and supplemental enzymes on digestibility and growth performance of weaner pigs. Animal Feed Science and Technology, 118(1-2), 139-152. doi:10.1016/j.anifeedsci.2004.08.016Koch, M. E., & Mahan, D. C. (1985). Biological Characteristics for Assessing Low Phosphorus Intake in Growing Swine. Journal of Animal Science, 60(3), 699-708. doi:10.2527/jas1985.603699xKonietzny, U., & Greiner, R. (2002). Molecular and catalytic properties of phytate-degrading enzymes (phytases). International Journal of Food Science and Technology, 37(7), 791-812. doi:10.1046/j.1365-2621.2002.00617.xLittell, R. C., Henry, P. R., & Ammerman, C. B. (1998). Statistical analysis of repeated measures data using SAS procedures. Journal of Animal Science, 76(4), 1216. doi:10.2527/1998.7641216xMahan, D. C. (1982). Dietary Calcium and Phosphorus Levels for Weanling Swine. Journal of Animal Science, 54(3), 559-564. doi:10.2527/jas1982.543559xMavromichalis, I., Hancock, J. D., Kim, I. H., Senne, B. W., Kropf, D. H., Kennedy, G. A., … Behnke, K. C. (1999). 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of weaner pigs. Australian Journal of Agricultural Research, 54(3), 323. doi:10.1071/ar02121She, Y., Su, Y., Liu, L., Huang, C., Li, J., Li, P., … Piao, X. (2015). Effects of microbial phytase on coefficient of standardized total tract digestibility of phosphorus in growing pigs fed corn and corn co-products, wheat and wheat co-products and oilseed meals. Animal Feed Science and Technology, 208, 132-144. doi:10.1016/j.anifeedsci.2015.07.011Van Soest, P. J., Robertson, J. B., & Lewis, B. A. (1991). Methods for Dietary Fiber, Neutral Detergent Fiber, and Nonstarch Polysaccharides in Relation to Animal Nutrition. Journal of Dairy Science, 74(10), 3583-3597. doi:10.3168/jds.s0022-0302(91)78551-2Varley, P. F., Callan, J. J., & O’Doherty, J. V. (2011). Effect of dietary phosphorus and calcium level and phytase addition on performance, bone parameters, apparent nutrient digestibility, mineral and nitrogen utilization of weaner pigs and the subsequent effect on finisher pig bone parameters. Animal Feed Science and Technology, 165(3-4), 201-209. doi:10.1016/j.anifeedsci.2011.02.017Varley, P. F., Flynn, B., Callan, J. J., & O’Doherty, J. V. (2011). Effect of phytase level in a low phosphorus diet on performance and bone development in weaner pigs and the subsequent effect on finisher pig bone development. Livestock Science, 138(1-3), 152-158. doi:10.1016/j.livsci.2010.12.014Vipperman, P. E., Peo, E. R., & Cunningham, P. J. (1974). Effect of Dietary Calcium and Phosphorus Level upon Calcium, Phosphorus and Nitrogen Balance in Swine. Journal of Animal Science, 38(4), 758-765. doi:10.2527/jas1974.384758
Isolation and characterization of bacterial strains with a hydrolytic profile with potential use in bioconversion of agroindustial by-products and waste
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Perspective: Food Environment Research Priorities for Africa-Lessons from the Africa Food Environment Research Network
Over the last 2 decades, many African countries have undergone dietary and nutrition transitions fueled by globalization, rapid urbanization, and development. These changes have altered African food environments and, subsequently, dietary behaviors, including food acquisition and consumption. Dietary patterns associated with the nutrition transition have contributed to Africa's complex burden of malnutrition—obesity and other diet-related noncommunicable diseases (DR-NCDs)—along with persistent food insecurity and undernutrition. Available evidence links unhealthy or obesogenic food environments (including those that market and offer energy-dense, nutrient-poor foods and beverages) with suboptimal diets and associated adverse health outcomes. Elsewhere, governments have responded with policies to improve food environments. However, in Africa, the necessary research and policy action have received insufficient attention. Contextual evidence to motivate, enable, and create supportive food environments in Africa for better population health is urgently needed. In November 2020, the Measurement, Evaluation, Accountability, and Leadership Support for Noncommunicable Diseases Prevention Project (MEALS4NCDs) convened the first Africa Food Environment Research Network Meeting (FERN2020). This 3-d virtual meeting brought researchers from around the world to deliberate on future directions and research priorities related to improving food environments and nutrition across the African continent. The stakeholders shared experiences, best practices, challenges, and opportunities for improving the healthfulness of food environments and related policies in low- and middle-income countries. In this article, we summarize the proceedings and research priorities identified in the meeting to advance the food environment research agenda in Africa, and thus contribute to the promotion of healthier food environments to prevent DR-NCDs, and other forms of malnutrition
The Effect of Feeding Sorghum-Barley Brewer’s Spent Grain (Sbbsg) on Performance and Egg Quality of Laying Hens
The objective of the study was to establish if inclusion of Sorghum-Barley Brewer’s Spent Grain (SBBSG) in laying hen diets will affect laying performance and egg quality. A total of 300 Bovan Brown laying hens (37 weeks old) were randomly allocated in a completely randomized design, to five dietary treatments, T1, T2, T3, T4 and T5, representing 0, 5, 10, 15 and 20% SBBSG inclusion in the diets, respectively. Each treatment was replicated 4 times and the trial lasted 112 days. Feed and water were provided ad-lib. Eggs laid were collected twice daily and laying performance and egg quality characteristics determined. There were no significant differences (P>0.05) among treatment diets for hen day and hen housed egg production, daily feed intake and egg weight. FCE was similar for T4 and T5 (0.54 and 0.54 respectively) and significantly better (P<0.05) than for T1, T2 and T3 (0.53, 0.53 and 0.53 respectively). Birds on T5 had eggs with significantly thicker shells (0.44mm) than that of birds on T1 to T4 (0.42, 0.42, 0.43 and 0.42 mm respectively). Birds that had no SBBSG in their diet (T1) had egg yolks with the highest cholesterol concentration (414.9 mg/dl). This was significantly higher (P<0.05) than cholesterol concentration of eggs from T2, T3, T4 and T5 (266.66, 279.62, 243.52 and 246.61mg/d), respectively. Feed cost per kg egg produced for birds on T5 was 1.33 GH¢. This was significantly lower (P<0.05) than feed cost for birds on T1 (1.41 GH¢) and similar (P>0.05) to birds fed T2 to T4 (1.38, 1.37 and 1.35 GH¢), respectively. The present study shows that SBBSG can effectively be included in laying hen diets up to 20% without any adverse effect on laying performance and egg quality while at the same time reducing egg cholesterol content and being cheaper.Keywords: Sorghum-Barley Brewer’s Spent Grain (SBBSG), Layers, Egg Qualit
Efficacy and possible adverse effects of the oral iron chelator 1,2- dimethyl-3-hydroxypyrid-4-one (L1) in thalassemia major [see comments]
Use of Non-Prescription Remedies by Ghanaian Human Immunodeficiency Virus-Positive Persons on Antiretroviral Therapy
BackgroundInappropriate use of non-prescription remedies by persons living with human immunodeficiency virus (PLHIV) may result in adverse events or potentiate non-adherence to prescribed medications. This study investigated the use of non-prescription remedies among PLHIV receiving antiretroviral therapy (ART) from four treatment centers in southern Ghana.MethodsA mixed method design using quantitative and qualitative methods was used. This article focuses on the quantitative survey of 540 respondents. Univariate analysis was used to generate descriptive tabulations of key variables. Bivariate analysis and logistic regression modeling, respectively, produced unadjusted and adjusted associations between background attributes of PLHIV and the use of non-prescription remedies. A p-value of < 0.05 was considered statistically significant. All analyses were performed using IBM SPSS Statistics for Windows, Version 20.0.ResultsOne out of three respondents reported the use of non-prescription remedies at least once within 3 months of the survey. Most of these were locally made and included “Angel natural bitters, concoctions from the Christian prayer centers, garlic, and mahogany syrups.” These remedies were used concomitantly with antiretroviral medications (ARVs)—46% or administered with ARVs but at different times during the day (43%). Some of the remedies were reportedly prescribed by health workers, or self-initiated during periods of ARVs shortage. Others took them based on their perception of their efficacy. Bivariate level analysis identified ART clinic site, place of residence, and ARV adherence monitoring to be significantly associated with the use of non-prescription remedies (p < 0.05). Multiple logistic regression analysis controlling for covariates confirmed the location of ART clinic as the only predictor of the use of non-prescription remedies. Compared to clients at the large urban teaching hospital (Korle-Bu Fevers Unit ART center), those at the district level (Atua ART center) were ninefold more likely to use non-prescription remedies [adjusted odds ratio (AOR) = 8.84; 95% confidence interval (CI) 2.83–33.72]. Those from a district level mission hospital (St. Martin’s ART center) were threefold as likely to use these remedies (AOR = 2.610; 95% CI 1.074–9.120).ConclusionThe use of non-prescription remedies by PLHIV on ART is common in southern Ghana. Usage is mostly self-initiated because of perceived efficacy of remedy, and was more common among clients attending rural ART clinics
Food elimination, food substitution, and nutrient supplementation among ARV-exposed HIV-positive persons in southern Ghana
Abstract Background Optimal nutrition is a determinant of health in all persons. In persons living with HIV (PLHIV), nutrition is particularly important. Various factors, including dietary practices, play a role in guaranteeing nutritional health. Objectives We investigated multiple non-prescription drugs use among HIV-positive persons receiving antiretroviral therapy (ART) from four treatment centers in southern Ghana. This paper, however, focuses on nutrient supplement use, food elimination, and food substitution practices by the PLHIV. Methods Using quantitative and qualitative methods, we collected data from 540 HIV-positive persons at the health facility level. This paper focuses on only the quantitative data. Individual study participants were selected using a systematic random sampling procedure. Participants were interviewed after informed consent. We used univariate analysis to generate descriptive tabulations for key variables. Multivariable logistic regression modeling identified predictors of three practices (nutrient supplementation, food elimination, and food substitution). P value less than 0.05 or 95% confidence intervals facilitated determination of statistical significance. All analyses were performed using IBM SPSS Statistics for Windows, version 20.0. Results The use of nutrient supplements was a popular practice; 72% of the PLHIV used various kinds. The primary motive for the practice was to boost appetite and to gain weight. A little over 20% of the participants reportedly eliminated certain foods and beverages, while 17% introduced new foods since their initial HIV diagnosis. All the three practices were largely driven by the quest for improved health status. We determined predictors of nutrient supplementation to be ART clinic location and having an ART adherence monitor. Having an ART adherence monitor was significantly associated with reduced odds of nutrient supplementation (AOR = 0.34; 95% CI 0.12–0.95). The only predictor for food elimination was education level (AOR = 0.29; 95% CI 0.30–0.92); predictors of food substitution were ART clinic location (AOR = 0.11; 95% CI 0.02–0.69) and anemia (defined as hemoglobin concentration less than 11.0 g/dl) (AOR = 0.21; 95% CI 0.12–0.85). Conclusions The practice of supplementation is popular among this group of PLHIV. Food elimination and substitution are practiced, albeit in moderation. The predictors identified may prove helpful in provider-client encounters as well as local HIV programming