Menopause doesn't cause bleoharoconjunctivitis or have a direct link to the serratia positive cultures. However, dry eyes do cause inflammation in the eyes which, when compounded with a blepharoconjunctivitis, can make the symptoms worse.
There is a direct link between menopause and dry eyes. The hormonal change will decrease tear production. Decreased tear production exposes the surface of the eyes which in turn become inflammed. The inflammation then worsens the dry eye, and so on...
you experienced prior to the diagnosis of dry eyes was a reflex to the dryness
. The brain detects the dryness and immediately sends signals to the eyes to increase tear production. These tears are not effective as their composition is too aqueous and they continue to evaporate quickly or fall right down your cheeks.
I will say that, dry eyes do cause microscopic defects on the cornea which can provide an entry point for bacterial infections. These infections normally involve corneal ulcers
. Since this has not been part of your clinical picture, it is doubtful that serratia could have used this avenue to achieve an infection.
I believe that blepharoconjunctivitis is the principal cause for your symptoms and it may be independent of the serratia positive culture. By properly treating the blepharoconjunctivitis, you will find significant, if not complete, relief of your symptoms.
You may use artificial tears, along with my other recommendations, to provide some relief while you heal.
The contact lens solution may have been contaminated, but, serratia is ubiquitous in the environment; so there are many sources it could have come from.