Final answer:
Oral quinolones are a class of antibiotics that can target both gram-negative and gram-positive bacteria. However, they are not effective against all types of bacteria, and some bacteria are resistant to quinolones.
Step-by-step explanation:
Oral quinolones are a class of antibiotics that are effective against both gram-negative and gram-positive bacteria. Some commonly used oral quinolones include ciprofloxacin, levofloxacin, and moxifloxacin. These antibiotics have a broad spectrum of coverage, meaning they can target a wide range of bacteria. However, it's important to note that no antibiotic can cover all types of bacteria, and there are some bacteria that are resistant to quinolones. Examples of bacteria that are often resistant to quinolones include methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa.