Sialadenitis is a condition which occurs when a bacterial infection affects the salivary glands. The infection can occur from the reduced flow of saliva or the blockage or inflammation of a salivary duct. The human mouth keeps flushed with saliva constantly. The main role of saliva is to aid digestion, breaks down food, and keeps the mouth clean. It also washes away the bacteria and food particles from the mouth. There are three pairs of large salivary glands which are located on each side of the face. 
Causes
The infection in the salivary glands usually occurs due to the bacterial infection. Staphyloccus aureus is one of the common bacterial infections while some others include streptoccus viridians, Haemphilus influenza, streptococcus pyogenes, and Escherichia coli.
Symptoms
some common symptoms which indicate the condition include:
- foul taste in the mouth
- inability to fully open the mouth
- feeling discomfort when opening your mouth
- Pus in the mouth
- Dry Mouth
- Pain in the mouth and face
- Redness or swelling over
Diagnosis of Sialadenitis
Salivary gland infection can be determined with help of visual examination. Presence of pus or pain at the affected gland can indicate a bacterial infection. The doctor may do additional testing to confirm the diagnosis and determine the underlying the cause. The imaging tests that can be done to further analyze the infection of the salivary include:
- Ultrasound
- magnetic resonance imaging
- computed tomography
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