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).
Rats can carry fleas that may be infected with the bacteria that cause bubonic plague. Headaches are common in people with bubonic plague. Bubonic plague manifests in the form of swollen lymph nodes. Bubonic Plague causes large bruises to appear. Exposure to infected rodents like the prairie dog can cause transmission of the bubonic plague.