Home
http://www.virbac.fr/ http://www.boehringer-ingelheim.com/ http://www.novartis.com/ http://www.animalhealth.bayerhealthcare.com/
vetcontact
Vetrinär
Tiermedizin
  WELCOME  
vetcontact
Vetrinär
Tiermedizin
  Privacy Policy  
  Home  
  Login / Newsletter  
vetcontact
Vetrinär
Tiermedizin
  CONTACTS  
vetcontact
Vetrinär
Tiermedizin
  Classifieds  
  New Products  
  VetCompanies  
  VetSchools  
vetcontact
Vetrinär
Tiermedizin
  PROFESSION  
vetcontact
Vetrinär
Tiermedizin
  Edutainment  
  VetAgenda  
  Presentations  
  Posters  
  ESAVS  
  Specialisation  
vetcontact
Vetrinär
Tiermedizin
  INSIGHT  
vetcontact
Vetrinär
Tiermedizin
  Congress News  
  Picture Galleries  
vetcontact
Vetrinär
Tiermedizin
  PRODUCTS  
vetcontact
Vetrinär
Tiermedizin
  Bayer  
  Boehringer Ing.  
  Novartis  
  Virbac

 
  Simply book for less...  
    

Bovine    Equine    Small Animal Practice    Swine Practice    Articles    Vetjournal    
deutsch english español polski francais
Home / WELCOME / Archiv / Bovine /     
 
A new sterilizing sperm defect in a bull
The development and use of modern techniques, such as intracytoplasmic sperm injection (ICSI), gene knockout and sperm fluorescence in situ hybridization with chromosome- specific probes, have significantly increased our knowledge about sperm defects. This interesting case report from Scandinavia describes a new sperm defect in a bull which only had abnormal spermatozoa in its ejaculate.

Because of its morphological characteristics the defect was named the multinuclear–multiflagellar sperm defect.

All spermatozoa in the ejaculate were abnormal. Many of the spermatozoa had multiple nuclei and multiple sperm tails.

All spermatozoa lacked an acrosome, and only seldom did spermatozoa have a mitochondrial helix in the midpiece area.

Meiosis and spermiogenesis were severely affected in this otherwise phenotypically normal bull.

The sperm defects resembled the phenotype of a targeted gene knockout Hrb/ (HIV-1 Rev-binding/interacting protein) mutant mouse strain, which is expressed as sterility in males, while females remain fertile.

Since the father of this bull has been extensively used in at least three countries the defective gene has possibly become widespread in the red and white breeds (Ayrshire, Swedish Red and White, Norwegian Red) in the Nordic countries. However, it is not proved that the father of this bull is a carrier of this defect.



Source: C Kopp, A Sukura, E Tuunainen, I Gustavsson, M Parvinen, M Andersson (2007): Multinuclear-Multiflagellar Sperm Defect in a Bull - a New Sterilizing Sperm Defect. In:
Reproduction in Domestic Animals 42 (2), 208–213.


Tell a friend   |   Print version   |   Send this article

BOVINE

Protecting protein to reduce methane production in ruminantsmembers
Ruminants have a low efficiency of nitrogen (N) utilization that has negative implications for animal production and the environment, but reducing the ruminal degradation of protein can help to reduce N losses. The objective of this study was to evaluate the inclusion of sunflower meal (SM) and sunflower seed (SS) protected against ruminal degradation in high‐cereal diets on in vitro ruminal fermentation and CH4 production.

  • Lifetime prognosis in cattle with necrotic laryngitismembers
  • ECG findings in neonatal calves with diarrhea and associated potassium balance disordersmembers
  • Bacterial translocation in calves with atresia colimembers
  • Optimising lameness detection in dairy cattle members
  • Role of melatonin and its receptors in animal reproductionmembers
  • Physiological changes in inflammatory parameters in cows prae and post partummembers
  • Zinc Deficiency-Like Syndrome in Fleckvieh Calvesmembers
  • Fertility of dairy cows after adding superphosphate to the drinking watermembers
  • Activity of continous releasing oxfendazole capsules against Ostertagia ostertagiimembers
  • Tricho-dento-osseus-like syndrome in a Brown Swiss calfmembers
  • Non-tuberculous Mycobacteria in healthy slaughtered cattle and the abattoir members
  • Subclinical ketosis in dairy cows: prevalence and risk factorsmembers


  • [ Home ] [ About ] [ Contact / Request ] [ Privacy Policy ]

    Copyright © 2001-2018 VetContact GmbH
    All rights reserved