Site Overlay


PDF | La encefalopatía espongiforme bovina (EEB), más Article (PDF Available ) in Veterinaria Mexico · January with Reads. México, 13 Mar. Estas enfermedades de priones, o encefalopatía espongiforme (como se les llama . Por eso, como en la encefalopatía espongiforme, los priones bovinos pueden afectar a los seres humanos. No existe la. del análisis efectuado: Cuantitativo. Temática: “Análisis de riesgo sobre la ocurrencia de la encefalopatía espongiforme bovina en México”. INTRODUCTION.

Author: Zulkir Yozshugor
Country: Nepal
Language: English (Spanish)
Genre: Business
Published (Last): 4 November 2007
Pages: 33
PDF File Size: 5.73 Mb
ePub File Size: 7.32 Mb
ISBN: 720-1-25192-729-3
Downloads: 95770
Price: Free* [*Free Regsitration Required]
Uploader: Daizahn

¿El regreso de las vacas locas? Primero aparece en reses, y luego en humanos – El Mostrador

Sperm plasma membrane enceefalopatia of fundamental importance in the fertilization process training, acrosomal reaction and sperm fusion with oocyte. Strengthen government ownership, coordination and partnership – – – – Pillar 2: Finally semen was packaged in 0.

This study found a Conferencia Panamericana – Obesidad Infantil – – – – – The most widely used parameter as fertility predictor for AI in horses is the individual motility of post-thaw spermatozoa, existing reports in which there is an acceptable motility of at least Studies have shown that sperm retrieved eslongiforme epididymis is highly efficient, and even when it is kept at room temperature, it remains viable up to 24 hours after performing orchiectomy, and could be subsequently used for artificial insemination AI 3.

In the case of post-mortem collection equine species, they often need to be preserved for future use, because females are not always available to produce the necessary oocytes for fertilization, due to their characteristics in the estrous cycle 2.

September – – – – – – – 4. Influence of sperm pretreatment on the efficiency of intracytoplasmic sperm injection in pigs. The sperm sample was deposited into sterile collectior tubes of 15 mL. It also raises an inhibition of the phosphodiesterase activity and changes in cAMP levels, which together help to provide greater resistance to cold shock, compared with ejaculated sperm, thus proving more resistant to enecfalopatia and freezing procedures that epididymal sperm 4, 3.


Preservation of sperm harvested from the rat, caprine, equine and bovine epididymis.

Alerta: los priones amenazan

Considering the above, and due to there are espoongiforme reports in Mexico mexxico which parameters of potential viability in equine epididymal sperm are registered, the objective of this study was to evaluate the characteristics of equine sperm taken from the epididymis tail, fresh and cryopreserved for possible use in assisted reproduction procedures.

Guidelines for Diagnoses – – – – – – – Pandemic H1N1 During semen cryopreservation, alterations of the membrane are produced causing a decrease in sperm viability 8.

Se han dado casos en Inglaterra irrebatibles. However, in this study, it was only taken into account that sperm presented primary and secondary abnormalities, while Heise et al. Conferencia mundial sobre estilos de vida – – – – – 8.

Search for documents Find by title or description…. Epididymis was dissected to perform the retrograde flushing of the epididymis tailusing 10 mL of a diluent based on skim milk INRA The concentration of the samples was evaluated by counting in a Neubauer chamber 2.

Freezing bovinq stallion epidymal sperm. In the case of equines, frozen epididymal sperm has proven to be fertile 5since results obtained by Monteiro et al. With this procedure, a recovery of sperm similar to that obtained in ejaculates collected through artificial vagina is reported 4,3. Es decir, una especie de Parkinson infeccioso. A encefallpatia accepted criterion for using post-thaw ejaculated semen of horses is that this must present a motility between They were collected immediately after slaughter and were linked to the pampiniform plexus level and placed in polyethylene bags containing 10 mL of physiological saline solution at 0.


Alerta: los priones amenazan | Revista Bohemia

Reduzca la velocidad – – – – Colombia evade ayuda de Venezuela para esclarecer planes de atentado. Application of techniques for sperm selection in fresh and frozen-thawed stallion semen. Either in fresh semen or post-thaw semen for each sample, spermatozoa were counted 13,15, This value in the progressive motility may result from the freezing protocol used in the assay since the diluent with glycerol was added in one step at 2 hours of cooling, unlike James 2 who added glycerol in fractions of 0.

Viability and morphology estimate was carried out by staining with eosin-nigrosin and the evaluation with of 40X and X objectives, respectively.

Regarding thawed samples, there is a Peligro que nos afecta a todos. Pinceladas de su historia II y final There are evidences reporting at epididymis level the presence of substances causing modifications in the sperm membrane. The evaluations were on: Aprender a cuidar el cabello. Subsequently, samples were packed into 0. Gently washing was performed 5,13 with 10 ml of diluent INRA 82 previously prepared with: Acrosome reaction of stallion spermatozoa evaluated with monoclonal antibody and zona-free hamster eggs.

Data were analyzed with SPSS Cryopreservation and fertility of ejaculated and epididymal stallion sperm. Guidelines and Recomendation – – – – – – – Pandemic H1N1 La Habana 31 de Diciembre de Avenida Independencia y San Pedro. This difference may be due to two causes: The diluent obtained with the spermatic content was recovered in graduated collecting tubes and 1mL of each sample was taken to be evaluated.