Which of the following causes plague?

Explanation

Plague is an acute epidemic disease of rats and other wild rodents caused by the bacterium Yersinia pestis. It is transmitted to humans by rat fleas. The symptoms include headache, fever, weakness, aching limbs, and delirium, followed by acute painful swellings of the lymph nodes. Bleeding under the skin, resulting in black patches, can lead to ulcers, which may prove fatal. Treatment with tetracycline, streptomycin, and chloramphenicol is effective.Trichinosis is caused by Trichinella spiralis, which lives as an endoparasite in the human intestine. Salmonella typhimurium causes enteric fevers, and Leishmania donovani is responsible for kalaazar.