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.
Viral conjunctivitis can often be diagnosed from symptoms and patient history. For example, if conjunctivitis accompanies a common cold or respiratory tract infection and if discharge from the eye is watery rather than thick, the cause is likely a virus.