Leukopenia
A shortage of white blood cells.
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- Leukoplakia
A white spot or patch on the mucous membranes in the mouth (for instance, inside the cheeks, on the gums, on the tongue) that may become cancerous.
- Leukoreduction
A process used to filter and remove white blood cells from whole blood before transfusion. The reason why white blood cells (leukocytes) are removed from blood is because they provide no benefit to the recipient but can carry bacteria and viruses to the recipient. Patients who receive blood that has not been leukoreduced may have […]
- Leukotriene
One of a group of chemicals produced by the body that accompanies inflammation. Leukotrienes are believed to play a major role in causing the symptoms of hay fever and asthma.
- Level 1 biosafety
Level 1 — This level applies to agents that do not ordinarily cause human disease. Level 2 — This level is appropriate for agents that can cause human disease, but whose potential for transmission is limited. Level 3 — This level applies to agents that may be transmitted by the respiratory route which can cause […]
- Level 2 biosafety
Level 1 — This level applies to agents that do not ordinarily cause human disease. Level 2 — This level is appropriate for agents that can cause human disease, but whose potential for transmission is limited. Level 3 — This level applies to agents that may be transmitted by the respiratory route which can cause […]