22b: Ruminant Infertility (Male)

Treatment for penile fibropapilloma

Can try careful trimming or an autologous vaccine

Primary treatment for penile hematoma

Rest

Cattle breeds that are predisposed to having preputial prolapse and why

Polled Bos taurus breeds; lack of retractor prepuce muscle

Anatomy that predisposes a bull to penile laceration

Pendulous sheath and excess preputial skin

Classification scale for preputial prolapse

1-4

What do you need to do if reducing a preputial prolapse with a bandage

Run a urinary catheter through

Medical management for preputial prolapse

• Clean and debride

• Keep moist

• Apply bandage

Typical cause of a retro-preputial abscess

Preputial laceration

Prognosis for preputial abscess

Guarded

Typical cause of a preputial avulsion

Collection with AV

Common causes of phimosis

Preputial stenosis or other stricture

Methods for semen collection

• Electroejaculation

• Transrectal massage

• AV

• Vaginal aspiration

Parts of a semen evaluation

• Concentration

• Volume

• Individual motility

• Sperm morphology

Why can’t we do an accurate semen evaluation from electroejaculation

It is not a physiologic process and we don’t get representative volume or concentration

Minimum progressive motility required for bull semen

30%

Method used to evaluate live v dead sperm when looking at sperm morphology

Eosin-nigrin stain

Minimum normal morphology required for bull semen

70%

Sperm defects that are no longer considered an abnormality

Distal droplets and abaxial tails

BSE classifications for bulls

• Satisfactory

• Deferred

• Unsatisfactory

Satisfactory BSE classification

• No health/structural issues

• Meets minimum scrotal circumference

• Adequate motility and morphology

Deferred BSE classification

Fails to meet one or more criteria but condition is likely to resolve with time

Unsatisfactory BSE classification

Fails to meet one or more criteria and is unlikely to resolve with time

How does a BSE differ between bulls and small ruminants

It is similar, but small ruminants have different cutoffs

Cause of epididymitis in small ruminants until proven otherwise

Brucella ovis

Cause of ulcerative posthitis in small ruminants

Corynebacterium renale

Risk factors for ulcerative posthitis in small ruminants

• High protein/legume diets

• Thick fiber

• Wet conditions