PPT-Lecture 6 Helminths-Cestodes/ Part II

Medical Parasitology Prof Dr Ahmed Ali Mohammed B Larval Tapeworm infection 1 Echinococcus granulosus This parasite causes a disease called unilocular or cystic hydatid disease. 22x1 lecture 14x1 lecture 14UIC UIC BioSBioS 101 Nyberg101 NybergReading AssignmentReading Assignment Chapter 12, study the figures and Chapter 12, study the figures and understand the color coding.un à l’état adulte. Dr . Ahraou. 2015. 2. PLATHELMINTHES . (vers plats. ). . Corps allongé aplati . dorso. -. ventralement. à symétrie bilatérale. Téguments mous déformables( protection, échanges respiratoires et métaboliques) tapissée intérieurement par une couche musculaire. HELMINTHS . Macroscopic, . multiceullar. organism. Having their own digestive system, excretory, reproductive and nervous systems. INTRODUCTION. Humans are the primary hosts.. Most worms produce in human sexually . All are:. 1- . Long . segmented . worms.. 2- Same morphology: head (. scolex. ) with or without hooks, have suckers for attachment.. short neck.. segmented body (. proglottid. ): (immature-mature-gravid segments).. Dr S . Ahraou. 2014. Cestodes. à l’état adulte. Cyclophyllidés. Pseudophyllidés. . Pseudocoelomates. Acœlomates. PLATHELMINTHES . (vers plats. ). . Corps aplati . dorso. .. Introduction/Background. Scientific classifications. Nematodes. Some species: . . A.lumbricoides,N.americanus. and . A.duodenale. Morphological properties. Pathogenesis. Epidemiology. Clinical manifestations. The Fungi. The . Fungi. A. Once thought to be plants but the cell wall is made of chitin rather than cellulose and these are not photosynthetic. B. Instead they are saprobic organisms that frequently live off of dead organic matter. Assistant Prof. Dr. . Ahmed A. Mohammed . Lecture 5. Helminths. • . Special adaptations for parasitic mode of life and for species survival are more apparent in the helminths than in the protozoa. . Medical Parasitology. Prof. Dr. Ahmed Ali Mohammed. Introduction to Helminths. The term “Helminths” mean “worms” in parasitology. It refers to the parasitic worms, those comprises two large phyla: Phylum Platyhelminths (flat worms) and Phylum Nemathelminths or Nematoda (true round worms), and two smaller ones: Phylum Nematomorpha (hair snakes) and Phylum Acanthocephala (thorny-headed worms), in addition to one class group from phylum Annelida, the class Hirudinea (Leeches).. . lumbricoides. Morphology:. It . causes: . Ascariasis. .. It’s found in the small intestine of man, and may be in other organs. .. The worm is elongated, cylindrical, and tapers both anteriorly and posteriorly to relatively blunt conical . Alaridah. MD, PhD. Medical . parasitology. is classified into. . Medical helminthology. Medical protozoology. Deals with parasitic worms. Deals with unicellular parasites. 1-Phylum : Platyhelminthes . Helminthes is derived from Greek word “. Helmins. ” meaning “worms”. The term is not correct because it is applied to all elongated invertebrates without appendages and with bilateral symmetry. . Medical Parasitology. Prof. Dr. Ahmed Ali Mohammed. II- Phylum: Nemathelminths or Nematoda. It is commonly known as thread worms. They are unsegmented, typically elongated and cylindrical with a fundamental bilateral symmetry. They have a complete digestive tract, dioecious with few exceptions (the nematodes are usually bisexual, but in a few instances the female may be parthenogenetic).. Gh. . . Fajir. . Helminthic. Parasites of Humans . •3 groups of helminthes . •. Cestodes. -tapeworms . •. Trematodes. -flukes . •Nematodes-roundworms . Cestodes. Trematodes. Nematode. Ribbon-like.