PSI Barbering Practice Exam

Which bacterial infection is known for becoming systemic and potentially deadly if untreated?

1. Streptococcus pneumoniae

2. Methicillin-resistant Staphylococcus aureus (MRSA)

3. Escherichia coli

4. Clostridium difficile

The correct answer is: Methicillin-resistant Staphylococcus aureus (MRSA)

Methicillin-resistant Staphylococcus aureus (MRSA) is known for its ability to cause infections that can become systemic and potentially life-threatening if not treated promptly. MRSA is a strain of the Staphylococcus aureus bacteria that has developed resistance to methicillin and other antibiotics, making it challenging to treat with standard therapy. The systemic nature of MRSA infections stems from its capability to enter the bloodstream, leading to conditions such as sepsis, which can affect multiple organ systems and result in severe complications. This is particularly concerning in individuals with weakened immune systems, those with open wounds, or patients following surgical procedures where the risk of infection is heightened. MRSA can manifest in various forms, from skin infections like abscesses and cellulitis to more severe conditions like pneumonia and endocarditis. The rapidly evolving resistance to antibiotics adds to the urgency of early intervention and effective management of MRSA infections to prevent them from escalating into systemic diseases. In contrast, while other bacterial infections mentioned can also be serious, they may not present the same level of urgency in terms of becoming systemic in the absence of effective treatment. For example, Streptococcus pneumoniae can cause pneumonia and meningitis, Escherichia coli is often associated with gastrointestinal illnesses,