Prevention of human brucellosis depends primarily on
**Core Concept**
Brucellosis is a zoonotic disease caused by the bacteria of the genus *Brucella*, which primarily affects livestock. Human brucellosis is a rare but serious infection that can be prevented through various measures.
**Why the Correct Answer is Right**
Prevention of human brucellosis primarily depends on avoiding exposure to infected animals and their products. This includes proper handling and disposal of animal tissues, pasteurization of dairy products, and vaccination of livestock. The most effective way to prevent human brucellosis is through the implementation of biosecurity measures in animal handling and slaughter facilities.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because, while vaccination of livestock is an important measure to control brucellosis in animals, it is not the primary method of preventing human brucellosis.
**Option B:** This option is incorrect because, although proper handling and disposal of animal tissues can help prevent human brucellosis, it is not the primary method of prevention.
**Option C:** This option is incorrect because, while pasteurization of dairy products can help reduce the risk of human brucellosis, it is not the primary method of prevention.
**Clinical Pearl / High-Yield Fact**
It is essential to note that human brucellosis can also be acquired through contact with infected animals, such as those used for laboratory research or in zoological parks. Healthcare workers and laboratory personnel should take necessary precautions when handling infected animals or their tissues to prevent transmission of the disease.
**Correct Answer: D. Biosecurity measures in animal handling and slaughter facilities.**