Lindsey had a differential WBC count that showed 60% neutrophils, 10% eosinophils, 1% basophils, 22% lymphocytes, and 7% monocytes. What could have caused this?
1. When eosinophils are high, an allergy may be the cause.
2. When eosinophils are high, a parasitic infection or an autoimmune disease may be the cause.
3. When neutrophils are high, a viral infection may be the cause.
4. When monocytes are high, a bacterial infection may be the cause.

Neutrophils and monocytes act against inflammations. Monocytes become macrophages and wound healing depends on their participation in the inflammatory response. Fever is a consequence of acute inflammation that corresponds to a massive neutrophilic response.

The main cause of a high number of eosinophils are the allergic disorders , but they also increase their activity, against parasite infections. Eosinophils release histamine, an enzyme that is responsible for hydrolyzing histamine, thus regulating the allergic response. Histamine is an amine whose function in the body, corresponds as an hormone, as a neurotransmitter and as a mediator of allergic responses.

An increase in lymphocytes is understood as the organism is suffering from an autoimmune disease.