Selective media plates are specialized laboratory tools used in microbiology to grow specific types of microorganisms while inhibiting the growth of others. These plates contain nutrients and specific agents that favor the growth of certain bacteria, such as Staphylococcus aureus, while suppressing unwanted species. This allows researchers to isolate and identify target organisms more effectively. Common examples of selective media include Mannitol Salt Agar and MacConkey Agar. Mannitol Salt Agar is used to select for Staphylococcus species, while MacConkey Agar is designed to isolate gram-negative bacteria, particularly Escherichia coli. By using selective media, scientists can streamline their studies and improve the accuracy of their results.