CRP and bacterial infectious disease with sepsis: Blood tests often reveal an increased white blood cell (WBC) count, usually elevated due to systemic inflammation, often with notable neutrophilia, along with elevated C-reactive protein (CRP) levels—a sensitive marker of acute inflammation—and procalcitonin (PCT), which may help distinguish bacterial from viral or non-infectious causes and tends to rise in severe bacterial infections, especially when erysipelas leads to bacteremia [15,23].