This quest is given by Cvaka Zichovani after you complete the Flower Picking quest. You must collect three glands from four different diseased creatures in the Feerrott.
Diseased Dregs - can be found in area south of camp around normal dregs.
Diseased Spiders - can be found in the area of cythan (mob for fbss) in the southwestern area of zone.
Diseased Sattars - can be found in the area east of falls, near thule sattars.