The genus Listeria contains six species, two of which are pathogenic: Listeria monocytogenes, the food-borne human pathogen responsible for listeriosis, on which this chapter is focused, and L. ivanovii, an animal pathogen.. Phages of Listeria monocytogenes are, with a few exceptions, specific with respect to the serogroup of the host cells. The major serogroups (1/2 and 4) can be differentiated on the basis of somatic antigen composition and sugar substitution of cell wall teichoic acids (TAs) (. ).
Eyelid swelling has many causes (see Table: Some Causes and Features of Eyelid Swelling). It usually results from an eyelid disorder but may result from disorders in and around the eye socket (orbit) or from disorders elsewhere in the body that cause widespread swelling. Common causes.
Causes of watery eyes. It is common to temporarily produce excess tears when you are emotional, laughing, coughing, vomiting, experiencing strong taste sensations, or yawning. One of the most prevalent reasons for watery eyes is dry eye syndrome. Extremely dry eyes can cause you to produce excess tears. If your tears do not contain enough of the right oils to lubricate your eyes, your eyes will continue to produce tears. Typically, watery eyes are temporary and resolve on their own when the cause is addressed or your eyes have healed. However, in some cases, the condition may persist.