ABSTRACT:  The genus Staphylococcus includes a wide range of species that are well-known for their saprophytic habit making 
them very important in clinical practice. The most common species of Staphylococcus are : S. aureus and S. epidermidis, which are 
well studied for their large contribution in health-cate associated infections. Many staphylococcal species have been commonly 
identified for their pathogenic action. The high attention that has been paid on these pathogenic bacteria is because of the increasing 
number of clinical studies that focused on their roles in different types of series infections, which have progressively increased human 
and financial cost to countries and societies.