Which of the following measures is current for prevention and control of plague?

The prevention and control of plague heavily rely on minimizing contact with the primary vectors of the infection, which are rodents and fleas. Rodents, particularly species like rats, can harbor the bacteria Yersinia pestis, which causes plague. Fleas that infest these rodents can transmit the bacteria to humans. Therefore, taking measures to reduce interactions with these animals and their parasites is crucial to preventing outbreaks.

Strategies may include implementing rodent control measures in residential areas, ensuring proper sanitation to remove potential rodent habitats, and educating the public on the risks associated with wild rodents and fleas in areas where plague is endemic. These measures effectively break the transmission cycle of the disease.

Other measures, while they may have some merit in specific circumstances, are not current standard practices for the prevention and control of plague. For instance, widespread vaccination of the entire population is not practical or necessary, as vaccinations are typically reserved for individuals at high risk. Regular antibiotic treatment for all is not feasible or effective outside of known cases or outbreaks. While insect repellent can help in certain contexts, it is not the primary recommendation for plague prevention indoors. Thus, minimizing contact with rodents and fleas stands out as the most significant and practical approach.