BCSE Theriogenology and Veterinary Reproduction 3

Question 1

A 6-year-old intact female dog presents with polyuria, polydipsia, and a pendulous abdomen 6 weeks after estrus. Vaginal discharge is absent. The most likely diagnosis is:

Accepted Answer

Closed-cervix pyometra

Answer

Closed-cervix pyometra presents without vaginal discharge because the cervix remains closed, causing uterine distension with pus and systemic signs such as PU/PD.

Question 2

Which organism is the most common cause of contagious equine metritis (CEM)?

Accepted Answer

Taylorella equigenitalis

Answer

Taylorella equigenitalis is the gram-negative obligate pathogen responsible for CEM, a reportable venereal disease causing endometritis and reduced fertility in mares.

Question 3

In the bull, what scrotal circumference (SC) is the MINIMUM for satisfactory classification under Society for Theriogenology BSE standards for a 24-month-old bull?

Accepted Answer

32 cm

Answer

A 24-month-old bull requires a minimum scrotal circumference of 32 cm to meet satisfactory classification, as SC correlates strongly with daily sperm output.

Question 4

Which stage of parturition in the mare is considered an emergency if it lasts more than 30 minutes?

Accepted Answer

Second stage (delivery of foal)

Answer

In mares, second-stage labor (expulsion of the foal) should not exceed 20–30 minutes; prolonged second stage risks placental separation and foal hypoxia.

Question 5

What is the term for the failure of one or both testes to descend into the scrotum in male dogs?

Accepted Answer

Cryptorchidism

Answer

Cryptorchidism describes the condition in which one (unilateral) or both (bilateral) testes fail to descend into the scrotal sac, predisposing to Sertoli cell tumors.

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE Theriogenology and Veterinary Reproduction 3