A scientist might work in a laboratory, out in nature, at a special office, as a professor, as a writer or journalist, and more! To answer puzzling questions, scientists might do everything from performing tests and collecting surveys to brainstorming and daydreaming! Scientists use all kinds of different tools for their jobs: Computers, telescopes, microscopes, rulers, thermometers, barometers, scales, beakers and test tubes, and much more!
The bacteria that causes the bubonic plague is called Yersinia pestis. This bacteria also causes the other two forms of plague: septicemic plague and pneumonic plague (see Types of Plague).
Plague is a zoonotic disease caused by the gram-negative bacteria Yersinia pestis. It is endemic (naturally occurring) on all continents except for Antarctica and Australia.neumonic plague can also develop secondary to the other types of plague and occurs when Y. pestis infects the lungs. Once in the lungs, Y. pestis is contagious and can spread to others through respiratory droplets, causing primary pneumonic plague.