Question

Given below are two statements:
Statement I: Trichomoniasis in bulls can be diagnosed by examination of serum using MAT test
Statement II: Brucellosis in cattle causes disease of the placenta
In the light of the above statements, choose the most appropriate answer from the options given below

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is correct but Statement II is false
• D. Statement I is incorrect but Statement II is true

Hint:

Reproductive Pathology Diagnostics:
Trichomoniasis in bulls $\rightarrow$ Preputial washings/scrapings (NOT serum).
Brucellosis in cows $\rightarrow$ Severe Necrotizing Placentitis with 'leathery' cotyledons.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Infectious reproductive pathology and diagnostic sampling: bovine venereal trichomoniasis is strictly non-systemic requiring preputial smegma sampling, whereas Brucella abortus tropism for erythritol drives severe necrotizing placentitis.

Step 2: Detailed Explanation:
1. Statement I: In bulls, Tritrichomonas foetus resides as a superficial commensal-like inhabitant of the preputial fornix and penile smegma without eliciting systemic humoral immunity. Serum antibody testing (MAT test is used for Leptospirosis) is completely useless. Diagnosis requires preputial washings/scrapings (smegma culture or PCR). Hence, Statement I is incorrect.
2. Statement II: Brucella abortus utilizes erythritol in the bovine gravid placenta, causing severe Necrotic Placentitis (thick, leathery, edematous intercotyledonary placenta with necrotized cotyledons covered in yellowish-brown exudate). Hence, Statement II is true.

Step 3: Final Answer:
Hence, Statement I is incorrect but Statement II is true, matching option (D).