Which organism is the causative agent of heartwater in ruminants?

Prepare for the TEDA Emerging and Exotic Diseases of Animals Exam with our interactive quizzes. Challenge yourself with multiple choice questions and detailed explanations to enhance your learning and boost your confidence for the exam!

Multiple Choice

Which organism is the causative agent of heartwater in ruminants?

Explanation:
Heartwater is caused by an obligate intracellular bacterium in the Anaplasmataceae family, Ehrlichia ruminantium. This tick-borne organism infects endothelial cells, leading to widespread vascular leakage and edema, including hydropericardium (fluid around the heart) and pulmonary edema; affected ruminants may show rapid pulse and nervous signs, and the disease can be rapidly fatal. It is distinct from other choices that cause different diseases: Babesia bovis is a protozoan parasite causing babesiosis with hemolytic anemia; Theileria parva causes East Coast fever; Anaplasma marginale causes bovine anaplasmosis. Thus, Ehrlichia ruminantium is the causative agent of heartwater.

Heartwater is caused by an obligate intracellular bacterium in the Anaplasmataceae family, Ehrlichia ruminantium. This tick-borne organism infects endothelial cells, leading to widespread vascular leakage and edema, including hydropericardium (fluid around the heart) and pulmonary edema; affected ruminants may show rapid pulse and nervous signs, and the disease can be rapidly fatal. It is distinct from other choices that cause different diseases: Babesia bovis is a protozoan parasite causing babesiosis with hemolytic anemia; Theileria parva causes East Coast fever; Anaplasma marginale causes bovine anaplasmosis. Thus, Ehrlichia ruminantium is the causative agent of heartwater.

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