4 research outputs found
Conducta estral circanual en ovejas Pelibuey bajo condiciones áridas del noroeste de México
In order to determine the circannual estrus behavior of Pelibuey ewes under arid conditions of Northwestern Mexico(32o NL), 22 adult ewes were maintained in confinement conditions with constant feeding during one year. Daily,morning and afternoon, the ewe group was exposed to one of three ram fitted with an apron to detect estrusbehavior. Annual averages of temperature, relative humidity and temperature-humidity index were 25.3±8.1 ºC,33.1±10.7 % and 72.0±8.4 units, respectively. Monthly percentage of ewes in estrus was lower (P0.05). Compared with others months, a higher (P36 and 0.05). Comparado con el resto de los meses; un mayor (P36 y <48h) fue mayor (P<0.05) en junio y agosto. En conclusión, en condiciones áridas del noroeste de México, las ovejas Pelibuey disminuyen su actividad estral de enero a junio, y las elevadas temperaturas ambientales de verano no son un factor que afecte la presencia de estro en dicha raza
Growth and carcass characteristics of lambs finished with zilpaterol hydrochloride in grazing alfalfa
El objetivo del estudio fue evaluar el efecto de clorhidrato de zilpaterol (CZ) sobre la ganancia de peso y las características de la canal en corderos finalizados en pradera de alfalfa y suplementados con concentrado en corral. Un total de 24 corderos machos enteros Dorper x Pelibuey, con peso vivo inicial de 25.0 ± 0.24 kg, fueron divididos en dos grupos (n=12) y alimentados con 0 o 10 mg/cabeza/día de CZ los últimos 30 días antes del sacrificio. Durante el periodo experimental, todos los corderos pastorearon en alfalfa 8 h/día y se suplementaron con 450 g/d de concentrado. El CZ no afectó (P>0.05) el peso vivo. Las ganancias de peso diaria y total fueron similares (P>0.05) entre ambos grupos. Las características de canal y el rendimiento de cortes primarios no fueron afectados (P>0.05) por el CZ. En conclusión, el clorhidrato de zilpaterol a una dosis de 10 mg/cabeza/día no mejoró el crecimiento ni las características de canal en corderos finalizados en pradera de alfalfa y suplementados con concentrado.The objective of the study was to evaluate the effect of zilpaterol hydrochloride (ZH) on the weight gain and carcass characteristics in lambs finished in alfalfa pasture and supplemented with concentrate in pen. A total of 24 Dorper x Pelibuey ram lambs initially weighting 25.0±0.24 kg were divided in two groups (n=12) and fed with 0 or 10 mg/ head/d of ZH for the last 30 d before slaughter. During the experimental period, all lambs were grazed in alfalfa during 8 h/d and supplemented with 450 g/d of concentrate. The ZH did not affect (P>0.05) the live weight. Daily and total weight gains were similar (P>0.05) between both groups. Carcass characteristics and wholesale cut yields were not affected (P>0.05) by ZH. In conclusion, growth and carcass characteristics were not improved by feeding zilpaterol (10 mg/head/d) in finished lambs on alfalfa grassland and supplemented with concentrate
Crecimiento y características de canal en corderas tratadas con clorhidrato de zilpaterol durante primavera y verano
Se utilizaron 44 corderas Dorper x Pelibuey con peso vivo promedio de 24.56±0.70 kg para evaluar el efecto del clorhidrato de zilpaterol (CZ) sobre el comportamiento productivo y algunas características de canal en épocas de primavera (n=24) y verano (n=20), bajo condiciones áridas del noroeste de México. En cada época, las corderas fueron colocadas en corraletas individuales y divididas en dos grupos para ser alimentadas sin CZ (SCZ) o con 10 mg de CZ/ animal/día (CCZ) durante 32 días. Posteriormente, todas las corderas fueron sacrificadas. La información se sometió a un análisis de varianza con un diseño de bloques completamente al azar con arreglo factorial 2x2. Las corderas CCZ de primavera presentaron mayor (P0.05) por efecto del CZ; contrariamente, el peso de canal caliente y fría, y la área del músculo Longissimus dorsi fueron mayores (P<0.05) en corderas CCZ. Solamente consumo de alimento y área del músculo Longissimus dorsi fueron afectados (P<0.01) por época. En conclusión, las altas temperaturas registradas en verano limitan el funcionamiento de CZ para mejorar el crecimiento y la eficiencia alimenticia de corderas de pelo finalizadas en corral, pero no las características de canal
Evaluation of a quality improvement intervention to reduce anastomotic leak following right colectomy (EAGLE): pragmatic, batched stepped-wedge, cluster-randomized trial in 64 countries
Background
Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks.
Methods
The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an online educational module introducing risk stratification, an intraoperative checklist, and harmonized surgical techniques. Clusters (hospital teams) were randomized to one of three arms with varied sequences of intervention/data collection by a derived stepped-wedge batch design (at least 18 hospital teams per batch). Patients were blinded to the study allocation. Low- and middle-income country enrolment was encouraged. The primary outcome (assessed by intention to treat) was anastomotic leak rate, and subgroup analyses by module completion (at least 80 per cent of surgeons, high engagement; less than 50 per cent, low engagement) were preplanned.
Results
A total 355 hospital teams registered, with 332 from 64 countries (39.2 per cent low and middle income) included in the final analysis. The online modules were completed by half of the surgeons (2143 of 4411). The primary analysis included 3039 of the 3268 patients recruited (206 patients had no anastomosis and 23 were lost to follow-up), with anastomotic leaks arising before and after the intervention in 10.1 and 9.6 per cent respectively (adjusted OR 0.87, 95 per cent c.i. 0.59 to 1.30; P = 0.498). The proportion of surgeons completing the educational modules was an influence: the leak rate decreased from 12.2 per cent (61 of 500) before intervention to 5.1 per cent (24 of 473) after intervention in high-engagement centres (adjusted OR 0.36, 0.20 to 0.64; P < 0.001), but this was not observed in low-engagement hospitals (8.3 per cent (59 of 714) and 13.8 per cent (61 of 443) respectively; adjusted OR 2.09, 1.31 to 3.31).
Conclusion
Completion of globally available digital training by engaged teams can alter anastomotic leak rates. Registration number: NCT04270721 (http://www.clinicaltrials.gov)