This is a prospective clinical study of 60 patients. The study will be performed in the
Otolaryngology department, Faculty of Medicine, Benha University during the duration from
June 2023 to December 2023.

Inclusion criteria:

Adult patients aged ≥18 years.

Exclusion criteria:

- Patients with known autoimmune diseases,

- Diabetes Mellitus

- History of cancer in the region of the head and neck or previous radio and/or
chemotherapy.

- History of facial nerve palsy,

- Oral and dental diseases including chronic sialadenitis or sialolithiasis.

- previous oral surgery.

Patients were divided into two equal groups each of 30 patients according to the cause of
infection. Group (1) comprises 30 patients with Covid-19 infection representing the study
group COVID-19 diagnosis will be based on a positive SARS-CoV-2 nasopharyngeal swab on
real-time reverse transcription-polymerase chain reaction (RT-PCR) in the presence of
clinical and/or radiological signs and group (2) comprises of 30 patients with
non-Covid-19 infection as a control group.

All patients will be submitted to full ENT and intraoral clinical examination. We will
Compare both groups as regards patients' characteristics, risk factors, etiology,
symptoms, and rate of recurrence of sialadenitis.