<prompt> Primary mediators of anaphylaxis are all EXCEPT:HistamineSerotoninProstaglandinsTNF  <response>: Ans. d TNF. Ref. Robbins pathology 7th ed. 63; Text book of Pathology by Harsh Mohan 5th ed. Chapter 5MEDIATORS OF ANAPHYLAXIS Histamine Serotonin Prostaglandins VIP Leukotrienes B4 and D4 TxA2 Prostaglandins Pg D2 and E2 Chemotactic factors for neutrophils and eosinophils 