Final answer:
1st Generation Cephalosporins cover pathogens represented by the acronym PECK, which stands for Pneumococci, Escherichia coli, Cutibacterium acnes, and Klebsiella species.
Step-by-step explanation:
The term 1st Generation Cephalosporins refers to a class of antibiotics that belong to the group of cephalosporins. The acronym PECK is often used to refer to the coverage of these antibiotics, standing for the types of bacteria that they typically are effective against: Pneumococci, Escherichia coli, Cutibacterium (previously Propionibacterium) acnes, and Klebsiella species.
It's important to remember that while this acronym can be helpful, the actual spectrum of activity can vary depending on the specific antibiotic within this class and the local patterns of antibiotic resistance.