What type of infection is caused by streptococcus bacteria?

Streptococcus bacteria are responsible for a wide range of infections commonly referred to as streptococcal infections. This term encompasses various illnesses caused by these bacteria, such as strep throat, scarlet fever, and skin infections. The designation "streptococcal infection" accurately captures the essence of the condition, as it specifically highlights the role of streptococcus as the causative agent of these various diseases.

The other options represent conditions that may not be directly caused by streptococcus bacteria. For instance, pneumonia is often associated with other pathogens, including bacteria like Streptococcus pneumoniae but also viruses and fungi. Similarly, bronchitis is usually related to viral infections or sometimes bacterial infections, but it does not specify streptococcus as the primary cause. Hepatitis refers specifically to liver inflammation most commonly caused by viral infections, and it is unrelated to streptococcus. Thus, the designation of streptococcal infection effectively encompasses the diverse spectrum of illnesses stemming from streptococcus bacteria, making it the most precise and appropriate choice.