Coenuri of T. multiceps are usually found in the eyes and brain; those of T. serialis are usually found in subcutaneous tissue
Taenia ( Cysticerci )
Coenurus (T. multiceps or T serialis )
green arrow – ectocyst - the cyst wall is composed of an acellular laminated external layer yellow arrow – endocyst - thin, germinal (nucleated) inner layer black arrow - brood capsule blue arrows – protoscoleces
daughter cyst (brood capsule) purple arrow - hooklets inside one of the protoscoleces light blue arrows - the calcareous corpuscles along the germinal layer.
Egg of Taenia -30-40 µm -Bile stained - straited Egg of H. nana -30-40 µm -Non bile stained -4 spicules Egg of cestodes : 3 pair of hooklets except D latum ( operculated )
Cercaria
Egg granuloma in liver – lateral spine – Schistosoma mansoni
Egg of Schistosoma : 100-150 µm, non operculated S. haematobium : terminal spine (Ca bladder) S. mansoni : lateral spine S. japonicum : spine inconspicuous
Eggs of Clonorchis & Opisthorchis 15-30 µm operculated with shoulders Cholangiocarcinoma
Egg of ascaris 50-60 µm Bile stained Rugosity Egg of trichuris 70-80 µm Bile stained barrel shaped bipolar plugs
Egg of ankylostoma / necator 50-60 µm Non bile stained 4 blastomeres Egg of enterobius 70 µm Non bile stained plano convex