FALSE statement about the Streptococcus is:
**Question:** FALSE statement about the Streptococcus is:
A. Streptococcus bacteria are always susceptible to penicillin
B. Streptococcus bacteria cause only mild respiratory infections
C. Streptococcus bacteria are resistant to vancomycin
D. Streptococcus bacteria cause only mild gastrointestinal infections
**Core Concept:** Streptococcus is a genus of Gram-positive, catalase-negative, rod-shaped bacteria that can cause a wide range of infections. Penicillin is a Ξ²-lactam antibiotic that is effective against many Gram-positive bacteria, including Streptococcus species. Vancomycin is a glycopeptide antibiotic used to treat infections caused by Gram-positive bacteria, including some Streptococcus species.
**Why the Correct Answer is Right:** Streptococcus bacteria can be susceptible, resistant, or intermediately sensitive to penicillin, depending on various factors like the species, the strain, and the presence of Ξ²-lactamase enzymes. Penicillin is not always effective against all Streptococcus species.
**Why Each Wrong Option is Incorrect:**
A. Streptococcus bacteria are not universally susceptible to penicillin. Some species, strains, and factors can render them resistant or intermediately sensitive.
B. Streptococcus bacteria can cause severe infections like pneumonia, meningitis, and strep throat, as well as less severe infections like skin abscesses and strep pharyngitis.
C. Some Streptococcus species are resistant to vancomycin due to the production of vancomycin-resistant enzymes or mutations, rendering them resistant or intermediately sensitive.
D. The statement is incorrect because Streptococcus bacteria can cause severe infections, not just mild gastrointestinal infections. Examples include streptococcal toxic shock syndrome, sepsis, and streptococcal pneumonia.
**Clinical Pearl:** It is essential for healthcare professionals to consider the clinical context, species, and strain when assessing the susceptibility of Streptococcus bacteria to antibiotics. This ensures appropriate treatment choices and prevents antibiotic resistance.