What is the causative organism of Q-fever?

Correct option is B

Ans: (b) Coxiella burnetii Sol. Coxiella burnetii is the causative organism of Q-fever. It is a bacterium that can be transmitted to humans from animals, typically through inhalation of contaminated dust, contact with animal tissues, or consumption of unpasteurized milk. Q-fever causes flu-like symptoms, including fever, chills, and fatigue.
Explanation of each option:
· (a) Varicella: Varicella (also known as chickenpox) is caused by the Varicella-zoster virus. It is not the causative organism of Q-fever.
· (b) Coxiella burnetii: Correct answer. Coxiella burnetii is the bacterium that causes Q-fever, a zoonotic disease.
· (c) Lyssavirus: Lyssavirus is the causative organism of rabies, not Q-fever.
· (d) Rotavirus: Rotavirus causes gastroenteritis, primarily in children, but is not related to Q-fever.