oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 11 )

2019 ( 772 )

2018 ( 937 )

2017 ( 899 )

Custom range...

Search Results: 1 - 10 of 511457 matches for " M.E. Trujillo-Ortega "
All listed articles are free for downloading (OA Articles)
Page 1 /511457
Display every page Item
Effects of Pre-Slaughter Transport, Lairage and Sex on Pig Chemical Serologic Profiles
D. Mota-Rojas,M. Becerril Herrera,M.E. Trujillo-Ortega,M. Alonso-Spilsbury,S.C. Flores-Peinado,I. Guerrero-Legarreta
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of this research was to study the effects of pre-slaughter transport and lairage on the chemical serologic profile of swine, as well as its relationship with qualitative aspects of meat: pH, color and temperature. Forty eight Pietrain x Landrace pigs were monitored (24 females and 24 barrows). They were transported on straw bedding trucks without stops during 2 h and deprived of feed and water. Blood samples were taken before loading, at arrival to the slaughterhouse, after lairage and during bleeding (20 sec after they were electrically stunned). At arrival to the slaughterhouse pigs were randomly distributed in 4 groups: Rested (n = 24) non-rested (n = 24) these groups were also divided by sex. Blood samples were taken form groups 1 and 2 and the animals sent directly to the slaughter pens, whereas groups 3 and 4, after blood sampling, were taken to lairage pens. Glucose and Creatine Kinase (CK) showed a high increase in blood concentration, associated to an increase in muscular activity and a decrease in globulins concentration as a consequence of stress and immunosuppression. Hyperglycemia and lactic acidosis detected in animals without rest were statistically different (p<0.05) compared to the group that rested. Bicarbonate level significantly decreased (p<0.05) in non-rested animals as compared to rested animals. Results indicated that animals without rest before slaughter can show hemodynamic and metabolic alterations that lead to hyperglycemia, lactic acidosis and an abrupt descent of pH, altering the carcass color.
Piglet Survival in Early Lactation: A Review
M. Alonso-Spilsbury,R. Ramirez-Necoechea,M. Gonzlez-Lozano,D. Mota-Rojas,M.E. Trujillo-Ortega
Journal of Animal and Veterinary Advances , 2012,
Abstract: Piglet death during the perinatal and lactation period is one of the more easily identified causes of reduced production efficiency in swine herds. Pre-weaning mortality rates vary between 12 and 25%. The present review analyses factors related with non-infectious pre-weaning mortality. Among the maternal factors, farrowing and intra-uterine asphyxia, behaviour and maternal ability are discussed. Piglet factors include newborn vigour, teat seeking ability, acidosis, hypothermia and hypoglucemia. Even though there had been technological changes and improvements in husbandry, housing designs and preventive measures, piglet mortality in lactation remains a major economical and welfare problem. The major causes of pre-weaning mortality are those associated with basic husbandry skills, starvation and crushing by the sow. One potential alternative to reduce neonatal mortality in pigs is the monitoring of foetal stress during birth, it is also important to consider the physiological, behavioural and biochemical changes that take place during early lactation which subsequently affect the vitality, maturity and development of neonatal pigs. A mortality rate of say 8% of piglets born alive is possible and should be the target, getting more knowledge of factors influencing piglet non-infectious mortality within the first three days may help improve piglet welfare.
Characterization of Boar Rental Schemes for Reproduction Purposes in a Swine Center in the Chinampa Region of Xochimilco, Mexico
S?nchez-Aparicio P,M. Gonz?lez-Lozano,D. Mota-Rojas,M. Alonso-Spilsbury,M.E. Trujillo-Ortega,R. Ram?rez-Necoechea,2R.E. P?rez-Galv?n
Journal of Animal and Veterinary Advances , 2012,
Abstract: Artisan pig family farms are an important mean of income, in spite of their poor performance they represent a small capital fund that can be used when faced with urgent cash flow situations, or to face immediate family feeding needs. Boar service rental in urban and rural areas is still common, this consists of renting boars for breeding in exchange of cash or in species. The objective of the present study was to carry out a retrospective analysis of the records of 63 boars, in order to characterize the frequency of use, age, preferred breed by the public of the region, and distances walked and traveled by the boars in service in the Chinampa region of Xochimilco, Mexico City. An average of 0.19 to 0.27 mountings per day was observed which corresponds to 1.36 and 1.92 mountings per week. Boars had short intervals between mountings, one or two days, or else carried out one mounting per year, registering an average of 15.94 days between breedings. Boars older than twelve months had the highest number of mountings, more than 50, and were used only for one year. Surprisingly, males staying for 3 to 4 years, were not the ones that registered more mating activity since these pigs could not overcome an average of 40 mountings during their 4 years staying at the farm. Distances walked by boars during service, varied from 0.5 km in the Chinampa region, to 25 km in urban areas. The results obtained in this study indicate that the reproductive efficiency in backyard swine breeding can not be established due to the lack of an appropriate reproductive program. It is necessary to consider hygiene and health measures in all the boars, since the increase in annual number of mountings could also rise the risk of venereal diseases during contact with females from different origin and unknown hygiene habits.
Systemic Effects of Sildenafil Citrate on Pregnancy and Perinatal Periods
P. Sanchez-Aparicio,D. Mota-rojas,R. Ramirez Necoechea,A. Olmos-Hernandez,M. Alonso-Spilsbury,D. Villanueva-Garcia,M.E. Trujillo-Ortega,R. Hernandez-Gonzalez
Journal of Animal and Veterinary Advances , 2012,
Abstract: Sildenafil citrate is an orally administered effective treatment for erectile dysfunction; nevertheless administrated in high concentrations produces relaxation of myometrium in pregnant women, thus sildenafil or related molecules may have future potential tocolytic application. In the present review sildenafil mechanism of action, pharmakocinetics and therapeutic use are discussed. Sildenafil is also considered a potent pulmonary vasodilator in pharmacology representing an alternative to neonates during the last month of in utero development. We conclude that studies in animals including metabolic and physiological traits in the fetus and neonates from treated dams with sildenafil in their last third of pregnancy may help to characterize neonate tolerance to asphyxia with posterior application in human perinatology.
Reference Values for Blood Gas Analysis, Electrolytes and Critical Biochemical Variables for Short-Hair-English and Duncan-Hartley Guinea Pigs Anaesthetized with Xylazine-Ketamine
P. Scnchez-Aparicio,D. Mota-Rojas,A. Verduzco-Mendoza,E. Arch-Tirado,R. Hernandez-Gonzalez,M. Alonso-Spilsbury,M. Gonzalez-Lozano,A. Alfaro-Rodriguez,R. Uribe-Escamilla,M. Becerril-Herrera,M.E. Trujillo-Ortega
Journal of Animal and Veterinary Advances , 2012,
Abstract: The objective of this study was to establish a range of reference values for blood gas analysis, electrolytes, hematocrit and critical blood variables for guinea pigs anaesthetized with xylazine-ketamine. The influence of the strain (short hair English vs. Duncan-Hartley) was also evaluated. Blood was obtained by cardiocentesis from 40 clinically healthy 8-11 weeks old female adult guinea pigs. Results indicated the following values: pH (7.28-7.55 vs. 7.38-7.53), PCO2 (28-42 vs. 33-44 mmHg), PO2 (18-70 vs. 25-52 mmHg), Na+ (124-141 vs. 126-137 mmol L-1), K+ (3-7.5 vs. 3.6-4.6 mmol L-1), Ca2+ (0.52-1.28 vs. 1.28-1.47 mmol L-1), glucose (64-190 vs. 98-211 mg dL-1), lactate (1-5 vs. 0.3-6.6 mg dL-1) and hematocrit (27-40 vs. 38-49%) for short hair English and Duncan-Hartley guinea pigs, respectively. No differences in the guinea pigs electrolytes or blood gas analysis were found. However, we can confirm that the individual’s pigmented short hair English strain showed the most favorable results in regard to the PCO2, Ca2+ and haematocrit values when submitted to the sedation combination of xylazine-ketamine.
Aplicación de somatotropina recombinante porcina en lechones durante la primera semana de vida: efecto sobre variables metabólicas y somatométricas Porcine recombinant somatotropin administered to piglets during the first week of life: effects on metabolic and somatometric variables
A Olmos-Hernández,ME Trujillo-Ortega,M Alonso-Spilsbury,M Becerril-Herrera
Archivos de medicina veterinaria , 2010,
Abstract: Con el fin de evaluar el efecto de la administración de la somatotropina recombinante porcina (rpST) en lechones, sobre las variables metabólicas y somatométricas durante la primera semana de vida, se evaluaron un total de 220 lechones al nacimiento de 40 cerdas híbridas Landrace x Large White. Los lechones fueron clasificados aleatoriamente en dos grupos. El Grupo 1 conformado por 106 lechones (Grupo testigo) y el grupo 2 por un total de 114 lechones (Grupo tratado con pST). La administración de la rpST se realizó a una dosis de 1 mg/kg cada 24 h durante siete días. En el pH al nacimiento se apreciaron diferencias significativas (P < 0,05) en ambos grupos (7,42 ± 0,47 y 7,31 ± 0,59), fenómeno que desaparece a la semana de vida. A la semana se observó un aumento significativo (P < 0,001) en los niveles de glucosa en los lechones del G2 vs. G1 (103,71 ± 18,4468, 78 ± 10,44). Al final del experimento la ganancia diaria de peso fue mayor para el grupo tratado con rpST (209,21 ± 45,97) respecto al grupo testigo (137,25 ± 31,31). Al comparar el efecto del tratamiento por sexo se observaron marcadas diferencias significativas (P < 0,001) en el pH, glucosa, lactato y peso ganado en los machos del G2 con respecto a las hembras del mismo grupo a los siete días postratamiento. Los lechones tratados con rpST presentaron diferencias significativas en las variables: perímetro abdominal (28,67 ± 4,41 y 31,79 ± 3,74 respectivamente), largo dorsal (28,42 ± 2,66 y 30,21 ± 4,70 respectivamente) y redondez del jamón (18,79 ± 2,62 y 22,38 ± 2,98 respectivamente). Investigación en proceso permitirá distinguir la masa corporal ganada por los lechones, en ósea o muscular. The aim of this study was to evaluate the effect of porcine recombinant somatotropin (rpST) administered to piglets during their first week of life, on metabolic and somatometric variables. A total of 220 piglets born from 40 hybrid Landrace x Large White sows were used. Piglets were randomly assigned to either Group 1 (G1, Control, n = 106) or Group 2 (G2, rpST treatment, n = 114). The rpST dose was 1mg/kg every 24h during 7 consecutive days. Serum pH at birth showed significant differences between groups (7.42 ± 0.47 and 7.31 ± 0.59), although this difference dissapeared on day 8. There was a significant increase (P < 0,001) in plasma glucose levels for the treated group on day 8 (68.78 ± 10.44 and 103.71 ± 18.44). Average daily weight gain was also higher for the somatotropin treated group compared to the control (137.25 ± 31.31 and 209.21 ± 45.97). Comparisons for interaction between treatment and sex sh
Physiological response to hypoxia in piglets of different birth weight
Roberto Martínez-Rodríguez,Daniel Mota-Rojas,María E. Trujillo-Ortega,Héctor Orozco-Gregorio
Italian Journal of Animal Science , 2011, DOI: 10.4081/ijas.2011.e56
Abstract: In the present study, we aimed to extend the characterization of the proposed naturalistic experimental model of piglets born with hypoxia by assessing the relationship between birth weight, intra partum asphyxia and gross indicators of neurophysiological alterations in newborn piglets. Three groups of 50 piglets each were classified according to their birth weight into normal (1000-1350 g), low (below 1000 g), and high (over 1350 g). In comparison to piglets within normal weight, those born with high birth weights showed acid-base imbalance as reflected by lower pH levels (7.03±0.01), hypercapnia (88.50±13.20 mmHg), and lactic acidosis (lactate levels: 89.40±26.30). These piglets had lower viability scores (5.40±0.60) and longer periods of time to contact the udder (52.30±8.30) than piglets with normal birth weight. In conclusion, data show that piglets with birth weight over 1350 g are at a higher risk of gross neurophysiological deficits, probably secondary to neonatal hypoxia.
Aplicación de somatotropina recombinante porcina en lechones durante la primera semana de vida: efecto sobre variables metabólicas y somatométricas
Olmos-Hernández,A; Trujillo-Ortega,ME; Alonso-Spilsbury,M; Becerril-Herrera,M; Hernández-González,R; Mota-Rojas,D;
Archivos de medicina veterinaria , 2010, DOI: 10.4067/S0301-732X2010000200011
Abstract: the aim of this study was to evaluate the effect of porcine recombinant somatotropin (rpst) administered to piglets during their first week of life, on metabolic and somatometric variables. a total of 220 piglets born from 40 hybrid landrace x large white sows were used. piglets were randomly assigned to either group 1 (g1, control, n = 106) or group 2 (g2, rpst treatment, n = 114). the rpst dose was 1mg/kg every 24h during 7 consecutive days. serum ph at birth showed significant differences between groups (7.42 ± 0.47 and 7.31 ± 0.59), although this difference dissapeared on day 8. there was a significant increase (p < 0,001) in plasma glucose levels for the treated group on day 8 (68.78 ± 10.44 and 103.71 ± 18.44). average daily weight gain was also higher for the somatotropin treated group compared to the control (137.25 ± 31.31 and 209.21 ± 45.97). comparisons for interaction between treatment and sex showed dramatic differences (p < 0,001) for glucose, lactate and weight gain for the males from g2 when compared to the females from the same experimental group on day 7 post-treatment. piglets treated with rpst showed significant differences in abdominal perimeter (28.67 ± 4.41 and 31.79 ± 3.74), dorsal length (28.42 ± 2.66 and 30.21 ± 4.70), and ham roundness (18.79 ± 2.62 and 22.38 ± 2.98). there is an ongoing research that will allow to determine the composition of body mass (bone or muscle) in the treated piglets.
Can Uterotonics Reduce Fetal and Newborn Piglet Mortality by Perinatal Asphyxia and Improve Functional Vitality?
Daniel Mota-Rojas,Maria Elena Trujillo-Ortega,Dina Villanueva-Garcia,Miguel Gonzalez-Lozano
Journal of Medical Sciences , 2006,
Abstract: Stillbirths in large-scale porcine farms are still a problem reducing the reproductive performance. Oxytocin and vetrabutin chlorhydrate are the uterotonics frequently used with the purpose to accelerate the labor in sows of different countries, including Mexico. Currently, there is controversy if uterotonic drugs use increase or not the survival of the newly born porcine. The objective of this review is to comment the schemes of treatment used with oxytocin and vetrabutin chlorhydrate and their effects on mortality due to postnatal and intrauterine asphyxiation and discuss the uterotonics schemes of treatment that have tried to resolve it as well. We conclude that it is necessary to establish the pros and contrast of the use of oxytocin and vetrabutin chlorhydrate and the uterotonics treatment schemes to stop their indiscriminate use and overdosage because of a lack of standardized dose protocols, routes of administration and times of application during farrowing, which increase the risk of perinatal mortality.
Lactational Estrus in Sows, a Way to Increase the Number of Farrowings Per Sow Per Year
M. Alonso-Spilsbury,L. Mayagoitia,M.E. Trujillo,R. Ram?rez- Necoechea,D. Mota-Rojas
Journal of Animal and Veterinary Advances , 2012,
Abstract: During lactation the sow generally remains anestrus. However, lactational estrus and ovulation sometimes occurs under unusual circumstances. Practical outcomes of lactational estrus are reducing the interval between weaning and estrusand therefore the non-productive days in the herd. Although various techniques to induce lactational estrus have been performed through natural management of the animals or the use of exogenous hormones during lactation, induction of estrus during lactation has not been recommended for commercial use. The objective of this study was to review and analyze the basic lactating sow physiology and the different methodologies to induce lactational ovulation, in order to improve her reproductive and productive performance, as a possible alternative to the early weaning system, especially in those cases where lactation length is determined by welfare constraints.
Page 1 /511457
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.