Answer by
vineetha20 (120)
Drop in monocytes is called leucopenia. The major causes for this are aplastic anaemia,medications,deficiency of vitamins and nutrients,chemotherapy,radiotherapy,liver diseases,spleen diseases,HIV,malaria,septicaemia,rheumatoid arthritis,bone marrow failure,infection,haemodialysis,Ebstein Barr Virus infection etc. Sometimes leucopenia may occur due to idiopathic causes.