Veterinary Andrology and Reproductive Techniques

KNOBBED ACROSOME DEFECT

• The acrosomal cap is enlarged 6-8 times.

Examination of Indian ink smear reveals the presence of highly refractive cyst formation in the anterior part of sperm head.

• The motility of the affected sperm is usually not affected.
• Affected bulls are sterile.
• This hereditary defect is seen in bulls, boars, dogs. But mainly seen in Friesian bulls and is caused by an autosomal recessive gene.