Monocytosis

Monocytosis often occurs during chronic inflammation
. Diseases that produce this state:
  * Infections: tuberculosis
, brucellosis
, listeriosis
,subacute bacterial endocarditis
, syphilis
, and other viral infections and many protozoal
 and rickettsial
infections (e.g. kala azar
, malaria
, Rocky Mountain spotted fever
).
  * Blood and immune causes: chronic neutropenia
and myeloproliferative disorders
.
  * Autoimmune diseases
 and vasculitis
: systemic lupus erythematosus
, rheumatoid arthritis
 andinflammatory bowel disease
.
  * Malignancies: Hodgkin's disease
 and certainleukaemias
, such as chronic myelomonocytic leukaemia
 (CMML) and monocytic leukemia
.
  * Recovery phase of neutropenia or an acute infection.