Diseases of the Bull Flashcards

1
Q

What muscles need to be relaxed in order for an erection to occur in a bull?

A

Retractor muscles

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2
Q

Do bulls have a small or large corpus spongiosum?

A

Small

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3
Q

Do bulls have a small or large corpus cavernosum?

A

Large

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4
Q

What are 3 juvenile conditions of the penis and prepuce seen in bulls?

A
  • Penile papilloma (warts)
  • Penile hair rings
  • Persistent frenulum
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5
Q

What is the etiology of penile papilloma (warts) in bulls?

What are 2 ways it can be introduced to bulls?

A
  • Bovine papilloma virus

- Homosexual riding among young bulls and wounds

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6
Q

What are 3 clinical signs that can be seen with penile papilloma (warts)?

A
  • Scant hemorrhage after coitus
  • Hesitancy to extend penis or breed
  • Usually single, pedunculate growth
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7
Q

What is the treatment for penile papilloma (warts) in bulls?

A

Surgical excision

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8
Q

What are 4 components of surgical treatment for penile papilloma (warts)?

A
  • Towel clamp
  • Tourniquet
  • Local anesthetic
  • 10 Fr. male dog catheter
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9
Q

What are 2 complications that can be seen with penile papilloma (warts)?

A
  • Recurrence

- Urethral injury

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10
Q

What part of the penis was a ligament that can be clamped on to with a tool clamp to help secure it?

A

Dorsal portion

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11
Q

What is the etiology for penile hair rings?

How can they occur?

A
  • Body hair accumulation on penis

- Homosexual riding among young bulls

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12
Q

What is the treatment for penile hair rings?

A

Remove the hair ring

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13
Q

What are 2 complications that can be seen with penile hair rings?

A
  • Necrosis of urethra which can lead to a fistula

- Amputation of glans penis

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14
Q

What is the etiology of the persistent frenulum?

A

Incomplete separation of the penis and prepuce.

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15
Q

Can a penis be extended with a persistent frenulum?

A

Yes

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16
Q

How does a penis with a persistent frenulum deviate?

A

Ventral deviation

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17
Q

How do you diagnose a persistent frenulum?

A

Physical exam

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18
Q

How do you treat a persistent frenulum?

A

Surgical excision

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19
Q

What are 3 components of surgical treatment for a persistent frenulum?

A
  • Towel clamp
  • Local anesthetic
  • Suture
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20
Q

Is persistent frenulum a heritable condition?

A

Yes

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21
Q

What is the minimal required motility for bulls?

A

30%

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22
Q

What are 3 conditions that can lead to preputial trauma and/or laceration?

A
  • Excessive pendulous sheath
  • Excessive preputial length
  • Large preputial orifice
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23
Q

What are 3 components to diagnosing preputial trauma or lacerations?

A
  • Swelling of sheath
  • History
  • Clinical signs
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24
Q

What are 3 differentials for preputial trauma or laceration?

A
  • Hematoma
  • Retropreputial abscess
  • Urethral rupture
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25
Which type of cattle is more prone to preputial trauma and lacerations, Bos indices or Bos taurus?
Bos indicus
26
When examining sheath conformation, the sheath should be above a line horizontal to the ground between what two body parts on the bull?
Between the carpus and tarsus.
27
What are 6 steps to how a preputial laceration can occur in a bull?
- Excess prepuce forced caudally during intromission - Forms collar tissue - Trapped between bull's abdomen and cow's bony pelvis - Laceration on ventral surface occurs during ejaculatory lunge - Lacerates longitudinal to long axis of prepuce - Heals transversely as bull retracts penis
28
What are 2 treatment options for a preputial laceration?
- Medical | - Surgical
29
What are 3 forms of conservative therapy for preputial lacerations in bulls?
- Clean damaged tissues - Emollient ointment - Bandaging and slings
30
What are 3 ingredients used in an emollient ointment for the treatment of preputial lacerations?
- 2 g tetracycline powder - 60 mL scarlet oil - 500 g anhydrous lanolin
31
What are 3 pre-surgical therapies for preputial lacerations?
- Reduce edema - Emollient ointment - Prophylactic antibiotics
32
What are 3 ways to reduce edema with preputial lacerations?
- Hydrotherapy - Pressure bandage - Slinging prepuce with burlap material
33
What are 3 surgical options for the management of preputial lacerations?
- Resection and anastomosis (circumcision) - Amputation of affected prepuce - Preputial reconstruction
34
What are 4 keys to successful treatment of preputial lacerations with resection and anastomosis?
- Aseptic technique - Hemostasis - Avoid urine contamination - Keep tissue happy
35
How long should bulls be sexually rested post-op after resection and anastomosis surgery for preputial lacerations?
60-120 days
36
What is the guideline for the maximum amount of prepuce that can be removed via resection and anastomosis?
Remaining prepuce should be a minimum of 1 1/2 times the length of the free portion of the penis.
37
What can be used for preputial amputation?
Plastic ring
38
What are 4 aspects of using a plastic ring for preputial amputation?
- Polyvinyl tubing placed into preputial prolapse - Ligating sutures - Amputate prepuce - Remove ring in 2 weeks
39
What is the minimal require normal morphology for bulls?
70%
40
Are penile hematomas more common in Bos indices or Bos taurus? Specifically what breed?
- Bos taurus | - Herefords
41
When are penile hematomas more common during the breeding season?
Early or late in breeding season
42
How do penile hematomas usually occur?
- Bull misses vagina on breeding thrust - Penis hits rear of cow or cow slips or goes down under weight of bull - Penis bends rapidly
43
How much pressure is required to rupture the tunica albuginea of the penis of a bull?
75,000 mmHg
44
Where is the rupture usually located with a penile hematoma? What muscle inserts here?
- Ruptures at dorsal aspect of distal bend of sigmoid flexure. - Insertion of retractor penis muscle
45
What are 2 clinical signs seen with a penile hematoma?
- Swelling in sheath immediately cranial to base of scrotum | - Usually symmetrical swelling
46
What are 3 ways to diagnose a penile hematoma?
- History - Physical exam - Location and size of swelling
47
What are 2 forms of treatment for a penile hematoma?
- Conservative/medical | - Surgical
48
How long should a bull be sexually rested for with a penile hematoma?
At least 60 days
49
What are 2 forms of medical treatment for a penile hematoma?
- Systemic antibiotics | - Hydrotherapy
50
What percentage of bulls return to service after a penile hematoma?
50%
51
When should surgery be performed for a penile hematoma? | If done in this time frame, what percent return to service?
- 3 to 7 days after injury | - 80%
52
Bulls treated surgically for penile hematomas should be sexually rested for how many days?
Minimum of 60 days
53
What is a suture pattern that can be used to surgically repair a penile hematoma?
Bootlace pattern
54
Where is a common location for a preputial avulsion?
Prepuce torn from connection to free portion of penis.
55
Preputial avulsions can be seen when what type of breeding tool is used?
AV injury
56
What are 3 types of penile deviations seen in bulls?
- S-shaped deviation - Rainbow/ventral deviation - Corkscrew or spiral deviation
57
What type of penile deviation can happen when the apical ligament is too short?
S-shaped deviation
58
What type of penile deviation can happen when the apical ligament is too long?
Rainbow/ventral deviation
59
What type of penile deviation can happen when the apical ligament cannot be maintained in a normal position?
Corkscrew or spiral deviation
60
How can penile deviations be diagnosed?
Test mating
61
What is a treatment for penile deviation?
Surgery
62
What is the most common sex gland to get infections in a bull?
Vesicular glands
63
Is vesiculitis more common in younger or older bulls?
Young bulls
64
What are 3 common bacterial causes of vesiculitis in bulls?
- B. abortus - A. pyogenes - H. somnus
65
What are 2 clinical signs of vesiculitis that can be detected on palpation?
- Painful | - Loss of lobulation
66
How is vesiculitis diagnosed?
Collection and stain diff-quick to look for WBCs.
67
What is a type of antibiotic that can be used to try to treat vesiculitis?
Tetracyclines
68
Is epididymitis more commonly unilateral or bilateral?
Unilateral
69
Epididymitis can often be seen with what 2 other conditions?
- Vesiculitis | - Orchitis
70
What are 3 clinical signs seen with epididymitis?
- Swollen - Painful early in disease - Small, hard, misshapen
71
What are 2 type of bacteria that can cause epididymitis?
- A. pyogenes | - B. abortus
72
How can epididymitis be diagnosed?
Collect a sample and use diff-quick to look for WBCs
73
What type of antibiotic can be used for epididymitis?
Tetracyclines