1. Introduction
A heavy responsibility is placed on macrophage
cells as a shield against various infectious agents
because of its phagocytotic, digestive and secretory
functions. Through its secretions and receptors, macrophage
participates in complex interactions involving
cellular and humoral components of the inflammatory
and immunologic networks [1].
Among the important products of macrophage is
nitric oxide (NO) which is a diatomic free radical
molecule that has various biological effects. It is
produced from its precursor L-arginine by macrophage