A class of microorganisms that are made of a single cell with a certain structure. While many bacteria are beneficial, some bacteria can cause disease. (plural, bacteria)
A biological product used in medicine
- Biosafety level 3 (BSL-3)
A specially designed, high-containment laboratory facility used for work with infectious disease agents that can cause severe disease or are potentially lethal. The Centers for Disease Control and Prevention has established four levels of biosafety laboratory facility, with level 4 designated for use with the most hazardous agents.
- Broad-spectrum antibiotic
An antibiotic that is effective against a wide range of bacteria, including both gram-positive and gram-negative bacteria. Examples include ampicillin, amoxicillin, ciprofloxacin, and tetracycline.