Question

Streptoccus is a major cause of tooth decay. It resides in the gum pockets, doesn't produce catalase, and can be grown in an anaerobic chamber. What is the characteristic of Streptoccus in relation to tooth decay?

1) It produces catalase
2) It resides in the teeth
3) It can be grown in aerobic conditions
4) It causes gum disease

Answer 1

Streptococcus mutans is a major contributor to tooth decay, it does not produce catalase and can be considered as a facultative anaerobe. It is responsible for the breakdown of sucrose into lactic acid, which then causes tooth mineral dissolution.

Step-by-step explanation:

The characteristic of Streptococcus mutans in relation to tooth decay is that it is a major cause of cavities. This bacterium lives in the gum pockets and is known for not producing catalase. Streptococcus mutans is crucial in the formation of plaque on teeth, as it metabolizes sucrose into lactic acid which then dissolves the minerals of the tooth, leading to tooth decay. In the context of the provided options, Streptococcus mutans can be grown outside an anaerobic chamber, indicating that it is likely a facultative anaerobe, meaning it can grow in both aerobic and anaerobic conditions. Furthermore, Streptococcus species, including S. mutans, can cause gum disease by inhabiting the oral cavity, contributing to plaque accumulation, and promoting gingivitis.