BSL-3: Biosafety level 3. A level of biosafety considered appropriate for agents that may be transmitted by the respiratory route which can cause serious infection.
BSL-4: Biosafety level 4. The highest level of biosafety. This level is used for the diagnosis of exotic agents such as the Ebola virus that pose a high risk of life-threatening disease, which may be transmitted by the aerosol route and for which there is no vaccine or therapy.
Bubo: An enlarged lymph node that is tender and painful. Buboes particularly occur in the groin and armpit (the axillae). These swollen glands are seen in a number of infectious diseases, including gonorrhea, syphilis, tuberculosis, and the eponymous bubonic plague.
- Bubonic plague
An infectious disease that is caused by the bacterium Yersinia pestis and is transmitted to humans from infected rats by the oriental rat flea. It is named for the characteristic feature of buboes (painfully enlarged lymph nodes) in the groin, armpits, neck, and elsewhere. Other symptoms of bubonic plague include headache, fever, chills, and weakness. […]
- Buerger's disease
Buerger’s disease: a rare, inflammatory disease of blood vessels characterized by blood clot (thrombus) formation. The disease usually affects small- and medium-sized arteries of the arms or legs, leading to the eventual occlusion of the arteries due to blood clot formation. The blockages caused by the blood clots disrupt the flow of oxygen to the […]
- Buffalo chest
Buffalo chest: A single chest cavity with no anatomic separation of the two hemithoraxes due, for example, to tension pneumothorax (air under pressure collapsing a lung). It is called buffalo chest because this anatomical peculiarity of the North American buffalo, or bison, helped the Indians of the Great Plains to kill them. A single Indian […]