Final answer:
For streptococcal community-acquired cellulitis, penicillin or amoxicillin is commonly prescribed. When MRSA is suspected, alternatives such as TMP/SMZ, clindamycin, doxycycline, or minocycline may be used based on antibiotic sensitivity testing. Completing the prescribed antibiotic course is essential to prevent resistance and fully clear the infection.
Step-by-step explanation:
Oral Antibiotic Options for Community-Acquired Cellulitis
For the treatment of community-acquired cellulitis, oral antibiotics are commonly used. When the causative pathogens are the Group A streptococci (GAS), Streptococcus pyogenes, the first-line treatment generally includes antibiotics such as penicillin or amoxicillin. These agents are selected due to their effectiveness against the typically suspected pathogens and the current lack of widespread resistance among streptococci.
In cases where Staphylococcus aureus is suspected or confirmed, and particularly if methicillin-resistant S. aureus (MRSA) is a concern, different antibiotics such as trimethoprim-sulfamethoxazole (TMP/SMZ), clindamycin, doxycycline, or minocycline might be considered. The choice of medication depends on the bacteria's antibiotic sensitivity, as determined by laboratory tests. In more severe or complicated cases, or when the infection is not responding to initial treatment, additional diagnostic tests and potentially intravenous antibiotics could be necessary.
It is critical that patients complete the full course of antibiotics prescribed, even if symptoms improve, to prevent the development of antibiotic-resistant strains and ensure the complete eradication of the infection.