Question:
In which species, the Rosette inhibition titre test is used to determine the presence of an early pregnancy factor?
In which species, the Rosette inhibition titre test is used to determine the presence of an early pregnancy factor?
Show Hint
Associate "Rosette Inhibition Titer" and "Early Pregnancy Factor" with sheep (ewe) reproduction studies, where it serves as a highly sensitive indicator of fertilization success within hours of mating.
Updated On: Aug 3, 2026
- Doe
- Bitch
- Ewe
- Sow
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Early Pregnancy Factor (EPF) is an immunosuppressive glycoprotein that appears in maternal serum within 24 to 48 hours of fertilization.
It is one of the earliest biological markers indicating successful fertilization and the presence of a viable embryo.
Step 2: Detailed Explanation:
The standard laboratory assay used to detect EPF is the Rosette Inhibition Titer (RIT) test.
The principle of the RIT test is based on the phenomenon that lymphocytes from pregnant animals require a lower concentration of anti-lymphocyte serum to inhibit rosette formation with heterologous red blood cells compared to lymphocytes from non-pregnant animals.
While research has identified EPF in several mammals, the RIT test has been most extensively studied, validated, and historically utilized in the ewe (sheep) as an early research tool for pregnancy diagnosis.
The test can identify pregnancy in sheep within 24 to 72 hours of mating, long before any physical or ultrasonographic signs are detectable.
However, due to its complexity and high technical demands, its use is primarily confined to research settings rather than routine field diagnostics.
Step 3: Final Answer:
The species associated with this test is the Ewe, which corresponds to option (C).
Early Pregnancy Factor (EPF) is an immunosuppressive glycoprotein that appears in maternal serum within 24 to 48 hours of fertilization.
It is one of the earliest biological markers indicating successful fertilization and the presence of a viable embryo.
Step 2: Detailed Explanation:
The standard laboratory assay used to detect EPF is the Rosette Inhibition Titer (RIT) test.
The principle of the RIT test is based on the phenomenon that lymphocytes from pregnant animals require a lower concentration of anti-lymphocyte serum to inhibit rosette formation with heterologous red blood cells compared to lymphocytes from non-pregnant animals.
While research has identified EPF in several mammals, the RIT test has been most extensively studied, validated, and historically utilized in the ewe (sheep) as an early research tool for pregnancy diagnosis.
The test can identify pregnancy in sheep within 24 to 72 hours of mating, long before any physical or ultrasonographic signs are detectable.
However, due to its complexity and high technical demands, its use is primarily confined to research settings rather than routine field diagnostics.
Step 3: Final Answer:
The species associated with this test is the Ewe, which corresponds to option (C).
Was this answer helpful?
0
0
Top ICAR AIEEA Veterinary Science Questions
- In ox vallate papillae are
- Spiral colon is characteristic of
- Assertion (A) : Stratum lucidum is translucent layer present between stratum spinosum and stratum granulosum
Reasoning (R) : Stratum lucidum is translucent due to presence of eledin protein.
In light of the above statements, choose the correct answer from the options given below. - Statement (I): Keratinocytes contain melanin pigment in the form of melanosomes.
Statement (II): Melanin pigment is produced by keratinocytes with the help of Tyrosinase enzyme.
In light of the above statements, choose the most appropriate answer from the options given below. - Which of the following is true for mast cells?
(A). These cells are common in loose connective tissue.
(B). These cells take metachromatic stain.
(C). These cells are rich in histamine, heparin and proteases.
(D). These cells contain basophilic cytoplasmic granules.
Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Veterinary Medicine Questions
- Normal serum calcium level in cattle is
- On echocardiography, dilated cardiomyopathy in dogs is characterized best by which of the following findings?
(A). Decreased ejection fraction
(B). Decreased fraction shortening
(C). Increased mitral valve E-point to septal separation (EPSS)
(D). Decreased LA/AO ratio
Choose the correct answer from the options given below: - Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Potassium may be supplemented by IV route at a rate over 0.5mEq/kg/hour in animals.
Reason (R): Adverse cardiac effects can occur above 0.5mEq/kg/hour rate.
In light of the above statements, choose the correct answer from the options given below. - Given below are two statements:
Statement (I): Myxedema on the forehead and face, resulting in a puffy appearance and thickened skin folds above the eyes is most common in hypothyroidism.
Statement (II): Above-described signs are also important clinical signs in case diabetes mellites.
In light of the above statements, choose the most appropriate answer from the options given below. - 'Cud dropping' condition may be observed in cattle due to
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions