Tonsils occur as a result of infection, most commonly viral or bacterial. While the question asks why tonsils occur (as in, why the organs are present), the reference primarily discusses tonsillitis, which is the inflammation of the tonsils. Therefore, the answer will address why tonsillitis, or inflammation of the tonsils, happens.
What Causes Tonsillitis?
Tonsillitis, the inflammation of the tonsils, is generally caused by infections. The main culprits are viruses and bacteria.
- Viral Infections: According to the reference, many cases of tonsillitis are caused by viruses such as those responsible for the common cold or the flu.
- Bacterial Infections: Some cases, the reference notes, are caused by a bacterial infection. The most common bacteria involved is group A streptococcus.
| Cause | Description | Example |
|---|---|---|
| Viral Infection | Inflammation due to a virus. | Common cold, Flu |
| Bacterial Infection | Inflammation due to bacteria, often group A streptococcus as the reference states. | Streptococcus throat (strep throat) |
Are Tonsils Contagious?
The reference specifies that while tonsillitis itself isn't contagious, the infections that cause it are. Therefore, if someone has tonsillitis caused by a cold, the cold virus is contagious, and someone else could contract the cold (and potentially develop tonsillitis).
