1. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Lecture Slide Presentation prepared by Christine L. Case Microbiology B.E Pruitt & Jane J. Stein AN INTRODUCTION EIGHTH EDITION TORTORA FUNKE CASE Chapter 25, part C Microbial Diseases of the Digestive System

2. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Helminthic Diseases of the Digestive System Figure 25.21

3. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Tapeworms Figure 12.27 Taenia spp. Transmitted as cysticerci in undercooked meat Cysticerci may develop in humans Diagnosed by observing proglottids and eggs in feces Treatment with praziquantel Neurocysticercosis may require surgery

4. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Tapeworms Figure 25.22

5. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Hydatid Disease Figure 25.23 Echinococcus granulosus Definitive host: Dogs, wolves Intermediate host: Sheep and other herbivores; Humans Transmitted by ingesting E. granulosis eggs Treatment is surgical

6. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Echinococcus granulosus Figure 12.28

7. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Pinworms Enterobius vermicularis Definitive host: Humans Transmitted by ingesting Enterobius eggs Treatment with pyrantel pamoate or mebendazole

8. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Pinworms Figure 12.29

9. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Hookworms Larvae in soil hatched from eggs shed in feces Larvae bore through skin; migrate to intestine Treated with mebendazole

10. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Hookworms Figure 25.24

11. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Hookworms Figure 12.30

12. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Ascariasis Figure 25.25 Ascaris lumbricoides Lives in human intestines Transmitted by ingesting Ascaris eggs Treated with mebendazole

13. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Trichinosis Figure 25.26 Trichinella spiralis Larvae encyst in muscles of humans and other mammals Transmitted by ingesting larvae in undercooked meat Treated with mebendazole to kill adults worms

14. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Trichinosis Figure 25.26 Adult Trichinella spiralis develop, invade intestinal wall of pig, and produce larvae that invade muscles. Section showing T. spiralis larvae encysted in pig’s muscle tissue (capsule is 0.25 to 0.5 in length). Human eats undercooked pork containing cysts. 1 2 3 In human intestine, cyst walls are removed, and T. spiralis adults develop. Adults produce larvae that encyst in muscles. 4 Meanwhile, other animals are infected by eating infected meat that has been dumped. 5 Capsule Section of T. spiralis Undercooked pork Garbage, including undercooked or raw pork T. spiralis adult