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Search Results: 1 - 10 of 224047 matches for " C. Lemus-Flores "
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Estudio comparativo en la respuesta inmune humoral de IgM E IgG en cerdo Criollo Mexicano y comercial
Mejía-Martínez,K.; Lemus-Flores,C.; Zambrano-Zaragoza,J.F.;
Archivos de Zootecnia , 2010, DOI: 10.4321/S0004-05922010000200003
Abstract: the aim of this work was to compare the humoral igg and igm immune response between mexican creole, cuino (cc) and mexican pelon (cpm) pigs and commercial f1 yorshire-landrace pigs (cco) to use it as indicators for resistance to disease. seventy six animals obtained from unidad académica de ciencias veterinarias y zootécnicas from universidad autónoma de nayarit were included. after shoot, all animals were challenged with bacterina mixta porcina, which included salmonella, escherichia coli and pasteurella antigens and the antibody levels were evaluated at eight and fifteen days after by elisa. igm anti-bacterina mixta porcina were significantly higher in cpm than in cc and cco (p<0.05). for igg levels, statistical differences were found neither between cpm and cc nor between cc and cco. however, cpm showed higher levels than cco. the results strongly suggest that cpm and cc have better humoral immune response than cco pigs.
Apparent Digestibility and Growth in Two Swine Genotypes Kept under Pasturing and Confinement Conditions
M. Becerril-Herrera,C. Lemus-Flores,H.J.G. Herrera,M.Alonso-Spilsbury
Pakistan Journal of Biological Sciences , 2006,
Abstract: The study was carried out with 13 Mexican Hairless (MHP) and 21 York-Landrace (Y-L) fattened pigs, randomly distributed in 4 treatments: 1) MHP under total confinement, 2) MHP in pasturing conditions, 3) Y-L in total confinement and 4) Y-L in pasturing conditions, all four groups were fed ad libitum. Morph metric growth in 63 days old pigs showed significant differences (p<0.0001) between breeds; however, at the end of the study (175 days old) significant differences were observed (p<0.05), both between breeds and between productive systems for the following variables: height at withers, hind- and fore- cane perimeters and snout length; indicating that the feeding system caused some hypertrophies in the organs mostly exercised. Results on the percentage of ileal apparent digestibility showed significant differences (p<0.001) between breeds and between productive systems too, whereas in the total apparent digestibility, differences between feeding-productive systems were only significant in the MHP. Results indicate that the MHP is a small size animal with thin limbs, these pigs show a great instinct for forage consumption but are unable to take advantage of this since they can not digest fiber, which ends with the myth that swine autochthonous breeds are able to digest fiber.
Genetic Diversity and Variation of ESR, RBP4 and FUT1 Genes in Mexican Creole and Yorkshire Pig Populations
C. Lemus-Flores,K. Mejia-Martinez,J.G. Rodriguez-Carpena,A. Barreras-Serrano
Journal of Biological Sciences , 2009,
Abstract: The ESR, RBP4 and FUT1 candidate genes were studied in 103 pigs from the commercial breed Yorkshire and Mexican Creole, Pelón and Cuino animals, for establishing genic and genotypic differences, unbiased diversity and genetic distances by employing standard distances and phylogenetic tree build up by the Neighbor-Joining technique. Polymorphism was determined by PCR-RFLP methods using established procedures from other investigations. For ESR gene there were no homozygote BB animals in Pelón and Cuino; the allele B and A were more frequent in Yorkshire (0.38) and Cuino (0.84). Genetic distance was greater in Yorkshire and Cuino as compared to Pelón, with greatest heterozygocity for Yorkshire (0.479) followed by Pelón (0.390) and Cuino (0.275). The BB genotype for RBP4 gene was not detected in any breed examined; there was no dependence of genic and genotypic frequencies in any breed. Allele A frequency was similar in Yorkshire, Pelón and Cuino pigs (0.74, 0.74 and 0.75), in similitude of frequency of AA and AB genotypes in all breeds. Genetic distances and heterozygocity were similar in the three breeds (Yorkshire, 0.390; Pelón, 0.390 and Cuino, 0.382). For FUT1 gene a major frequency of allele G and genotype GG was found in Yorkshire (0.60 and 0.45) and Pelón (0.64 and 0.39) animals. The allele A was more frequent in Cuino pigs (0.55). There was a greater genetic distance between Yorkshire and Cuino animals. Cuino pigs showing a greater heterozygocity (0.503) as compared to Pelón (0.465) and Yorkshire (0.448) which in turn were no different between them.
Slaughtering Process, Carcass Yield and Cutting Process in California and Chinchilla Rabbit Breeds
D. Mota-Rojas,ADL.Reyes,M. Becerril-Herrera,S. Flores-Pintado,M. Alonso-Spilsbury,L.A.Cardona,C. Lemus-Flores
Journal of Food Technology , 2013,
Abstract: The objective of the present study was to evaluate the effects of sex and breed, on the slaughtering performance, carcass yield and cutting process in rabbits. Eighteen female and male rabbits of the Chinchilla and California breeds were used, animals were sacrificed according to the Official Mexican Norm. No significant differences between breeds and gender for all the variables were observed, except for ham roundness; California does showed the highest value, being significantly different from the males for both breeds. At 70 days, California rabbits showed a greater body development compared with the Chinchilla breed. Also, no significant differences were found between breeds for the primary cuts; although there was a numeric difference between Chinchilla and California rabbits regarding loin cut (291 vs. 273 g, respectively). The carcass yield obtained in this study was 58.51%, the greatest yield was observed in California does. Positive correlations were found between average daily gain and live weight (r= .89); skin weight and hot carcass weight (r=0.90), and live weight with both, skin weight (r= 90) and hot carcass weight (r=0.91).
Growth,Morphometry and Reproductive Performance of Creole Cuino Pigs in Mexico
C. Lemus-Flores,R. Alonso Morales,J.G. Herrera Haro,M. Alonso-Spilsbury,R. Ram?rez-Necoechea,D. Mota-Rojas
Journal of Animal and Veterinary Advances , 2012,
Abstract: Several biotypes of the Mexicanc creole pig are in danger of extinction. This study was carried out in order to characterize the Mexican cuino pig. Growth, morphometry and reproductive traits are statistically described analysing the reproductive performance of 12 Cuino sows kept under confinement conditions. Average live weight was monitored at birth and 6 months later (0.86 and 43.84 kg, respectively). Results show that Cuino pigs tend to deposit more backfat than commercial breeds, their growth rhythm was adjusted to a polynomial equation (Y = 1.1138x2 - 4.0804x + 5.1355 R2 = 0.9955); it is slow at the beginning and after 91 days animals showed an accelerated growth. Average daily feed intake increased until pigs were five months old, from 0.403 to 1.930 kg., with an improved polynomial adjustment (Y = 0.2363x2 - 1.3129x + 5.7951 R2 = 0.82). Feed conversion was 4.596 in the first post-weaning month and 5.174 in the last month of fattening at 6 months. Cuino pigs are small, with short snout and a small number of teats. The variation in all the measured morphological variables was low (7.5 to 16.7%), this suggests that their morphology does not vary much. Prolificity of these pigs was low; the average number of pigs born alive was 4.95 with a litter birth weight of 4.35 kg and 4.12 weaned pigs with 16.09 kg at weaning. Present results indicate that the cuino pig has not been genetically improved since the time it has been in Mexico.
Cytokine Immune Response in Mexican Creole and Commercial Pigs Under Uncontrolled Conditions
K. Mejia-Martinez,C. Lemus-Flores,J.F. Zambrano-Zaragoza,R. Ramirez-Necoechea,D. Mota-Rojas,M. Alonso-Spilsbury
Journal of Animal and Veterinary Advances , 2012,
Abstract: The aim of the study was to measure the cytokine immune response in 2 Mexican creole biotypes and compare it to commercial pigs (COM) as disease resistance indicators. Twenty six commercial (COM), 25 Cuino (CP) and 25 Mexican hairless (MHP) pigs were vaccinated with a commercial bacterin containing Salmonella, E. coli and Pasteurella at 45 days of age; a sample was taken a week later to test serum levels of interleukin 1 (IL-1 ), interleukin 4 (IL-4), interferon-gamma (INF- ) and alfa tumor necrosis factor (TNF- ). Cytokine quantification serum tests were carried out with commercial kits using the ELISA sandwich method. The Kruskal-Wallis test was used to compare cytokine concentrations and the Wilcoxon test was run to look for differences among breeds. IL-1 and IL-4 production was higher in HMS as compared to the other breeds. No significant differences between INF- and TNF- production were seen. Results suggest that MHP have a higher response capacity before an infection, compared to the other breeds.
Respuesta humoral de IgM e IgG en cerdos Criollos Mexicanos y Comercial, predestete sin reto inmunológico inducido
Mejía-Martínez,Karina; Lemus-Flores,Clemente; Zambrano-Zaragoza,José Francisco; González-Morteo,Carlos A;
Zootecnia Tropical , 2010,
Abstract: in the present study the igm and igg humoral response was analyzed and compared between mexican creole pigs (cuino pig and mexican hairless pig) and commercial pigs (cp) f1 yorkshire-landrace, to establish differences that allowed to use them like indicator of resistance to disease. seventy six weanling pigs to the 45 days of age without vaccination were included. a blood sample was obtained at weaning to evaluate the igm and igg antibody level to the bovine pig mixed bacterin, contains stocks of salmonella, escherichia coli and pasteurella, by elisa. the sonicated bacterin was used to sensitize plates. the igm anti-bacterin levels were higher in mexican haerless pig (mhp) that in the other breeds (p<0,0001). no differences in the igg anti bacterin levels between cuino pigs (cc) and mhp were found, nevertheless both creole breeds were different that the cp (p<0,0001), who showed a lower antibody response. our results show that mhp and cc have both a better humoral response to salmonella, escherichia coli and pasteurella than cp.
Aspectos relevantes del bienestar del cerdo en tránsito
Becerril-Herrera, Marcelino;Mota-Rojas, Daniel;Guerrero Legarreta, Isabel;Schunemann de Aluja, Aline;Lemus-Flores, Clemente;González-Lozano, Miguel;Ramírez-Necoechea, Ramiro;Alonso-Spilsbury, María;
Veterinaria México , 2009,
Abstract: current globalization policies demand animal welfare standards on animal transportation. in spite of international tendencies to commercialize meat cuts while decreasing live animal transit, transport is still one of the major problems in terms of animal welfare, besides carcass and meat by-products' quality. the present review analyzes, in general terms, the different definitions on animal welfare and factors affecting pig welfare in transit. several case studies are referred to as examples, showing the animal response to stress during transport and its effects on both meat quality and the economic impact. in addition, legal requirements and mexican regulations for pig transportation are also described. information in regard to swine stress and welfare in transit, considers a number of factors that alter the animal metabolic homeostasis with subsequent negative effects on pork quality. it is conclude that knowledge on basic animal behavioral and physiological needs during transport, as well as a suitable training of personnel, are necessary for reducing animal welfare problems. last but not least, some recommendations on handling practices are given in order to improve swine welfare during transit.
Comparación de las pruebas rosa de bengala y rivanol con elisa para el diagnóstico de brucelosis bovina - Comparing the rosa de bengala and rivanol in the elisa test for diagnosis of bovine brucellosis
Mejía Martínez, K,Lemus Flores C
REDVET , 2012,
Abstract: ResumenLa brucelosis es una enfermedad zoonótica que puede impactar fuertemente en el ámbito económico, además de representar un problema de salud pública.AbstractBrucellosis is a zoonotic disease that can have a strong impact on the economy and it represents a public health problem.
Prolactin Receptor (PRLR) Gen Polymorphism and Associations with Reproductive Traits in Pigs
A. Barreras Serrano,J.G. Herrera Haro,S. Hori-Oshima,A. Gutierrez Espinosa,M.E. Ortega Cerrilla,J. Perez Perez,C. Lemus Flores,A.L. Kinejara Espinosa,A. Gonzalez Arangure,J.G. Soto Avila
Journal of Animal and Veterinary Advances , 2012,
Abstract: The Prolactin Receptor (PRLR) gene was investigated as candidate gene for swine reproductive traits. 335 sows of 4 genetic groups: Yorkshire (Y), Landrace (L) Duroc (D) and YL were included. The traits studied were: Total Number of Born (TNB), Number Born Alive (NBA), Number of Weaned Piglets (NWP), Litter Weight at Birth (LWB) and Litter Weight at Weaning (LWW). The polymorphism was identified by PCR-RFLP. Allelic frequencies between each genetic group and Hardy-Weinberg equilibrium were tested by chi-square test. The association between PRLR genotypes with reproductive traits was evaluated by a linear model. Additive and dominance effects were estimated. The frequency of A allele was in general 0.46, with variation between genetic groups. D had the highest values for TNB. YL showed the best performance for NBA. AA genotype in D showed the best performance for NWP but no differences were found among genotypes L, YL and L. Differences in first parity were observed between genotypes for TNB, with highest value in BB (10.40 piglets). In general, additive effect per allele A resulted in a negative increase of 2.26 pigs (TNB) and positive of 0.42 kg (LWB) per litter. For TNB and LWB, dominance effect was -2.67 pigs and -0.56 kg, respectively. For LWW, additive in L resulted in -8.37 kg while dominance effect was 8.37 kg.
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