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).
Pneumonic plague may occur if a person with bubonic or septicemic plague is untreated and the bacteria spread to the lungs. Septicemic plague is caused by plague bacteria that grow and spread in the blood. It can result from pneumonic or bubonic plague or it can occur by itself.When it occurs alone, it is caused in the same ways as bubonic plague.epticemic plague is caused by plague bacteria that grow and spread in the blood. It can result from pneumonic or bubonic plague or it can occur by itself. When it occurs alone, it is caused in the same ways as bubonic plague.