What is infectious dacryoadenitis primarily believed to be caused by?

Infectious dacryoadenitis is primarily believed to be caused by an infection ascending from the conjunctiva. This condition involves inflammation of the lacrimal gland, which is responsible for producing tears. The conjunctiva, being the mucous membrane that covers the front of the eye and lines the inside of the eyelids, can serve as a route for pathogens to reach the lacrimal gland.

When an infection occurs in the conjunctiva (like conjunctivitis), it can lead to a secondary infection or inflammation of the lacrimal gland due to the proximity and interconnectedness of the eye structures. This ascending infection is often bacterial or viral in nature and can result in symptoms like swelling, pain, and discharge.

Understanding this pathway highlights the importance of treating conjunctival infections promptly in order to prevent complications such as dacryoadenitis.