Raised neutrophils are found in bacterial infection, raised lymphocytes are found in viral infections such as glandular fever and lymphocytic leukaemia (CLL), raised eosinophils are found in parasitic infections, asthma, or allergic reactions
and raised monocyte
and basophils are found in monocytic leukemia, chronic ulcerative
colitis, regional enteritis and leukemia or lymphoma respectively.