Milk is highly essential food in our life, even if considered as a highly favorable medium for multiplication of different types of microorganisms including disease-producing bacteria as Nocardia species, especially if milk is produced, stored, or handled under poor sanitary conditions. Nocardia species continue to be highly dangerous human pathogens. There is an increase interest of Nocardia species particularly N.asteroides as health risk affecting both human and animal. Also, because of the involvement of milk in human infection. The genus Nocardia was named after Nocard in,...