Topics:
Animal Physiology, Animal Refresher
Eosinophilia — Condition
Eosinophilia condition occurs in:
- Allergy & Parasitic disease — Correct Answer
- Bacterial disease
- Viral disease
- None
Explanation:
Correct Answer: Allergy & Parasitic disease
Eosinophilia (increased eosinophil count in blood) occurs in allergic conditions and parasitic infections.
Why Eosinophilia in Allergy and Parasitic Infections?
- Allergy: During allergic reactions (Type I hypersensitivity — IgE-mediated), mast cells and basophils degranulate releasing histamine and chemokines → attract eosinophils to the site of inflammation. Eosinophils release enzymes that inactivate histamine and limit the allergic response.
- Parasitic infections: Parasites (helminths like roundworms, tapeworms, flukes, mange mites) stimulate the IgE-mediated immune response → eosinophils are attracted to attack parasite larvae (ADCC — Antibody Dependent Cell-mediated Cytotoxicity).
Mnemonic for Eosinophilia (NAACP)
Neoplasm, Asthma, Allergy, Collagen vascular diseases, Parasites
Summary of WBC Changes
- Eosinophilia → Allergy, Parasites
- Neutrophilia → Bacterial infections, Stress
- Lymphocytosis → Viral infections, Chronic infections in ruminants
- Monocytosis → Chronic infections (TB), recovery phase
- Basophilia → Rare; hypothyroidism, chronic hemolytic anemia
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
