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Effect of the presence and location of corpus luteum on competence of bovine cumulus-oocyte complexes

Moreno Jerez, Edgar Ricardo ; Arias García, Alejandra; Caccia, Marina; Chávez Rodríguez, Aldemar; Restrepo Gonzales, Silvia Juliana; Mogollón-Waltero, Edgar Mauricio; Dubeibe, Diego (2022)

This study aimed to determine the effect of presence of the corpus luteum (CL) and its influence on cumulus–oocyte complexes (COCs) obtained from the ipsilateral or contralateral ovary in bovine on the recovery and capacity ...
Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes

Arias García, Alejandra; Tobón Torreglosa , Julio César ; Dubeibe, Diego; Marques Bernal, Marcella Katheryne; Rolim Filho, Sebastião tavares; Pereira Washington, Luiz Assunção (2022)

One of the limiting factors of productive efficiency in cattle and buffalo herds is related to the high prevalence of infectious diseases which affect reproduction. The aim of this study was to determine the prevalence of ...

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Effect of the presence and location of corpus luteum on competence of bovine cumulus-oocyte complexes
...
Moreno Jerez, Edgar Ricardo | 2022

This study aimed to determine the effect of presence of the corpus luteum (CL) and its influence on cumulus–oocyte complexes (COCs) obtained from the ipsilateral or contralateral ovary in bovine on the recovery and capacity of the oocytes to sustain mono-spermic fertilization, undergo preimplantation development, and develop to the blastocyst stage. Ovaries were collected at a local slaughterhouse and kept in pairs corresponding to the same animal. In the first experiment the variables evaluated were compared between cows with (CCL+) and without (CCL-) CL, and for the second experiment, comparisons were made between ovaries with an ipsilateral (CL+), contralateral (CL−), and no (NCL). The recovery rate of COCs was higher in ovaries from CCL− cows, and a higher proportion of grade 1 COCs were recovered from this group. A higher proportion of metaphase I oocytes at 7 h of maturation, and a higher rate of cleavage were observed in the CCL+ group; however, a higher proportion of embryos were obtained from the CCL− group. Besides, COCs from the CL+ group had a lower proportion of grades 1 and 2 morphological qualities, lower rate of metaphase II oocytes at 22 h of maturation, and lower rate of formation of two pronuclei, whereas a higher proportion of unfertilized oocytes after in vitro fertilization. On the other hand, the COCs from the CL− group displayed a lower proportion of oocytes with more than two pronuclei, higher cleavage rate, and higher final blastocyst production were obtained when compared to CL+. Thus, the effects of CL on the competence of bovine COCs are different depending on the anatomical proximity of their location in the animal, negatively affecting the quality of COCs located in the same ovary, but not having negative effects on the competence of COCs in the ovaries contralateral to their location. © The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes
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Arias García, Alejandra | 2022

One of the limiting factors of productive efficiency in cattle and buffalo herds is related to the high prevalence of infectious diseases which affect reproduction. The aim of this study was to determine the prevalence of anti-Leptospira antibodies for bovine viral diarrhea virus (BVDV) and bovine herpesvirus type 1 (BoHV-1) in bovine and buffalo herds in Colombia. Blood serum samples were collected from 1100 buffaloes and 1000 cattle. The ELISA technique was used to detect antibodies against BVDV and BoHV-1, and the microscopic agglutination technique to detect anti-Leptospira antibodies. The prevalence of anti-Leptospira antibodies and of BVDV and BoHV-1 in bovine samples was observed in 16, 39.7, and 65% of animals, respectively, while the positivity in samples for the same antibodies in buffalos was detected in 18.7, 27.5 and 51.5%, respectively. Exposure of cattle and buffaloes to BoHV-1 was positively associated with age, higher prevalence rates were observed in older ages. Seropositivity of cattle for BVDV and BoHV-1 was higher in male animals. Activities such as embryo transfer, milking, and needle reuses, as well as the presence of cats and rodents are factors which favor positivity of the herd for BVDV and BoHV-1.

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Browsing by Author "Arias García, Alejandra"

Effect of the presence and location of corpus luteum on competence of bovine cumulus-oocyte complexes ﻿

Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes ﻿

Envíos recientes

Effect of the presence and location of corpus luteum on competence of bovine cumulus-oocyte complexes

Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes

Effect of the presence and location of corpus luteum on competence of bovine cumulus-oocyte complexes

Leptospirosis, bovine viral diarrhea and infectious bovine rhinotracheitis: prevalence in Colombian cattle and buffaloes