Several bacterial infections are prevalent and pose a significant public health risk. Some common examples include: - Streptococcus pneumoniae: Causes pneumonia, meningitis, and sepsis. - Mycobacterium tuberculosis: Responsible for tuberculosis. - Escherichia coli: Can cause urinary tract infections, gastroenteritis, and neonatal meningitis. - Staphylococcus aureus: Known for causing skin infections, pneumonia, and bloodstream infections. - Helicobacter pylori: Linked to peptic ulcers and gastric cancer.