Final answer:
Increased eosinophils are typically observed in the blood of a patient with a parasitic worm infection as they play a critical role in fighting these infections.
Step-by-step explanation:
If a patient comes in with a parasitic worm infection, the blood cell count you would likely see increased is eosinophils. Eosinophils are a type of white blood cell or granulocyte that stain with eosin and have a principal role in fighting parasitic infections. These cells are especially active against parasitic worms, releasing antihistamines and toxic molecules that combat the infection. Eosinophils are attracted to infection sites by T cell cytokines and are known for their capability of phagocytosis, especially effective when antibodies form an antigen-antibody complex. High eosinophil counts are typical for patients with parasitic worm infestations, allergies, and some autoimmune diseases, while low counts may be due to drug toxicity and stress.