Question:
Given below are two statements:
Statement (I): Babesiosis is caused by extraerythrocytic parasite in bovines and is transmitted transovarily by Rhipicephalus (Boophilus) microplus ticks.
Statement (II): Babesia bovis is the small form in cattle, while Babesia canis is the large form in dogs.
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I): Babesiosis is caused by extraerythrocytic parasite in bovines and is transmitted transovarily by Rhipicephalus (Boophilus) microplus ticks.
Statement (II): Babesia bovis is the small form in cattle, while Babesia canis is the large form in dogs.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): Babesiosis is caused by extraerythrocytic parasite in bovines and is transmitted transovarily by Rhipicephalus (Boophilus) microplus ticks.
Statement (II): Babesia bovis is the small form in cattle, while Babesia canis is the large form in dogs.
In light of the above statements, choose the most appropriate answer from the options given below.
Show Hint
To remember tick-borne protozoa:
- Babesia = Intraerythrocytic (inside RBCs).
- Theileria = Intraerythrocytic and intralymphocytic.
- Anaplasma = Intraerythrocytic rickettsia.
- Babesia = Intraerythrocytic (inside RBCs).
- Theileria = Intraerythrocytic and intralymphocytic.
- Anaplasma = Intraerythrocytic rickettsia.
Updated On: Jul 14, 2026
- Both Statement (I) and Statement (II) are correct.
- Both Statement (I) and Statement (II) are incorrect.
- Statement (I) is correct but Statement (II) is incorrect.
- Statement (I) is incorrect but Statement (II) is correct.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Babesiosis is a tick-borne disease caused by protozoan hemoparasites of the genus Babesia.
These parasites infect red blood cells, causing hemolytic anemia, fever, and hemoglobinuria.
Step 2: Detailed Explanation:
Let us evaluate each statement individually:
- Statement (I) is incorrect:
Babesiosis is caused by an intraerythrocytic (within red blood cells) parasite, not an extraerythrocytic parasite.
The sporozoites invade erythrocytes where they multiply as merozoites.
However, the second part of the statement is correct: it is transmitted transovarially and transstadially by ticks, such as Rhipicephalus (Boophilus) microplus in bovines.
- Statement (II) is correct:
Historically, Babesia species are classified into large or small forms based on their size relative to erythrocytes:
- In cattle, Babesia bovis is a small form (\(1.5-2.0\) \(\mu\text{m}\)), while Babesia bigemina is a large form (\(3.0-3.5\) \(\mu\text{m}\)).
- In dogs, Babesia canis is a large form (\(4.0-5.0\) \(\mu\text{m}\)), while Babesia gibsoni is a small form.
Since Statement I is incorrect and Statement II is correct, this corresponds to Option (D).
Step 3: Final Answer:
Statement (I) is incorrect but Statement (II) is correct, matching Option (D).
Babesiosis is a tick-borne disease caused by protozoan hemoparasites of the genus Babesia.
These parasites infect red blood cells, causing hemolytic anemia, fever, and hemoglobinuria.
Step 2: Detailed Explanation:
Let us evaluate each statement individually:
- Statement (I) is incorrect:
Babesiosis is caused by an intraerythrocytic (within red blood cells) parasite, not an extraerythrocytic parasite.
The sporozoites invade erythrocytes where they multiply as merozoites.
However, the second part of the statement is correct: it is transmitted transovarially and transstadially by ticks, such as Rhipicephalus (Boophilus) microplus in bovines.
- Statement (II) is correct:
Historically, Babesia species are classified into large or small forms based on their size relative to erythrocytes:
- In cattle, Babesia bovis is a small form (\(1.5-2.0\) \(\mu\text{m}\)), while Babesia bigemina is a large form (\(3.0-3.5\) \(\mu\text{m}\)).
- In dogs, Babesia canis is a large form (\(4.0-5.0\) \(\mu\text{m}\)), while Babesia gibsoni is a small form.
Since Statement I is incorrect and Statement II is correct, this corresponds to Option (D).
Step 3: Final Answer:
Statement (I) is incorrect but Statement (II) is correct, matching Option (D).
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