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Causes of leukocytosis. (b)

Basophilic leukocytosis(basophilia)

Rare, often indicative of a myeloproliferative disease (e.g., chronic myelogenous leukemia)

Monocytosis
Chronic infections (e.g., tuberculosis), bacterial endocarditis, rickettsiosis and malaria;
collagen vascular diseases (e.g., systemic lupus erythematosus)
inflammatory bowel diseases (e.g., ulcerative colitis)

Lymphocytosis
Accompanies monocytosis in many disorders associated with chronic immunologic stimulation (e.g., tuberculosis, brucellosis);
viral infections (e.g.,hepatitis A, cytomegalovirus, Epstein-Barr virus);
Bordetella pertussis infection.