Final answer:
The etiologic agent that leads to the formation of abscesses is Staphylococcus, specifically Staphylococcus aureus.
Step-by-step explanation:
The etiologic agent that results in the formation of abscesses is staphylococcus. Abscesses are a common result of infections caused by Staphylococcus aureus, which is known for its ability to cause a range of conditions from mild skin infections to more serious diseases. Staphylococcus bacteria can enter the body through a break in the skin and then localize to create a pocket of pus, which is a characteristic of an abscess.
Other agents listed such as Blastomyces, Mycoplasma, Coccidioides, and Streptococcus can also cause infections, but they are not typically associated with abscess formation to the extent that Staphylococcus is. Mycoplasma pneumoniae is associated with atypical pneumonia, commonly referred to as "walking pneumonia." For conditions like Valley fever, the causative agent is Coccidioides, specifically the species C. immitis
It's important to identify the correct infectious agent to provide proper medical treatment. In the context of bacteria and fungus, understanding the specific pathogen is crucial for targeted antibiotic or antifungal therapy. For example, antibiotics used to treat Staphylococcus bacteria would differ from those used to treat fungal infections like Coccidioidomycosis.