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What is Leucocytosis is seen in all except: and explain in detail?
Usually, in bacterial infections there is neutrophilia; in viral infections lymphocytosis; and in parasitic infestations, eosinophilia. Typhoid fever, an example of acute inflammation, however, induces leucopenia with relative lymphocytosis.
Reference:  Textbook of Pathology, Harsh Mohan, 7th ed page no 134