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).
Bubonic plague: Patients develop sudden onset of fever, headache, chills, and weakness and one or more swollen, tender and painful lymph nodes (called buboes).This form usually results from the bite of an infected flea. The bacteria multiply in the lymph node closest to where the bacteria entered the human body.neumonic plague is the most serious form of the disease and is the only form of plague that can be spread from person to person (by infectious droplets). Plague is a serious illness. If you are experiencing symptoms like those listed here, seek immediate medical attention.