3Entamoeba histolytica Pathogenic (amoebic dysentery).Central endosome (karyosome).Regular distribution of peripheral chromatin.Trophozoite stage : amoeboid shape, metabolically active
4Entamoeba histolytica Presence of RBC inside E. histolytica. Amoebic Dysentery penetrates the intestinal mucosa so cause bloody diarrhea.extra intestinal involvement ( abscesses in liver , lungs & rarely in brain).
14Taenia saginata Cestode worm is composed of 3 parts: 1- scolex : responsible for the attachment to intestinal mucosa by suckers.2- Neck: responsible for strobilization / production of body segments.3- Body : compose of segments (proglottids)
152- Mature : developing of sex organs occur. It has 3 types of proglottids (segments) :1-Immature: near the neck, 2- Mature : developing of sex organs occur.3- Gravid : the segment is mature & uterus is filled with eggs.
19Diphyllobothrium latum Intermediate host is fish infected with larva Scolex of D.latum:Has no suckers / instead it has 2 grooves called bothria ( di-phyllo-bothria )
20D. latum gravid proglottides Gravid segment of D.latumCan appear in stool(like taenia)Width is more than the lengthUterus has rossete shape ( no longitudinal branches like tinea)§ Central genital pore (lateral in taenia)
21D.latum Eggs : Like trematode eggs Oval shape Transparent, hasn’t thick wallOperculated: ( has a cap , the cap open so embryo will be released from egg.
23Comparison of Cestodes Comparison of CestodesTaenia saginataTaenia soliumDiphyllobothrium latumScolexSucking Disks OnlySucking Disks Plus a Rostellum with HookletsSucking Grooves (Bothria)ProglottidLonger than it is WideWider than it is LongUterusLateral Branching> 13 Branches (About 16)< 13 Branches (About 8)Rosette in ShapeGenital PoreLocated on the Lateral MarginLocated Centrally