From Wikipedia, the free encyclopedia. Prostaglandin D2 (or PGD2) is a prostaglandin that binds to the receptor PTGDR (DP 1), as well as CRTH2 (DP 2). It is a major prostaglandin produced by mast cells â recruits Th2 cells, eosinophils, and basophils.In mammalian organs, large amounts of PGD 2 are found only in the brain and in mast cells. It is critical to development of allergic diseases such as asthma.t is a major prostaglandin produced by mast cells â recruits Th2 cells, eosinophils, and basophils. In mammalian organs, large amounts of PGD 2 are found only in the brain and in mast cells.
Viral and bacterial conjunctivitis. Viral conjunctivitis and bacterial conjunctivitis may affect one or both eyes. Viral conjunctivitis usually produces a watery discharge. Bacterial conjunctivitis often produces a thicker, yellow-green discharge.Both types can be associated with colds or symptoms of a respiratory infection, such as a sore throat.Both viral and bacterial types are very contagious. They are spread through direct or indirect contact with the eye secretions of someone who's infected.acterial conjunctivitis often produces a thicker, yellow-green discharge. Both types can be associated with colds or symptoms of a respiratory infection, such as a sore throat. Both viral and bacterial types are very contagious.
With viral conjunctivitis, symptoms usually are worse beginning about three to five days after the eye infection begins. You may need eye drops containing decongestants or antihistamines to reduce irritation and swelling, sometimes for as long as one or two weeks.