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Intestinal Parasites and Infestation
Michael P. Federle, MD, FACR
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Definitions

              • Enteric infection with roundworm Ascaris lumbricoides
              • Enteric protozoal infection with Giardia lamblia, Cryptosporidium, or Entamoeba histolytica

            IMAGING

            • General Features

              • Radiographic Findings

                • Fluoroscopic Findings

                  • CT Findings

                    • Ultrasonographic Findings

                      • Imaging Recommendations

                        DIFFERENTIAL DIAGNOSIS

                          PATHOLOGY

                          • General Features

                            • Gross Pathologic & Surgical Features

                              • Microscopic Features

                                CLINICAL ISSUES

                                • Presentation

                                  • Demographics

                                    • Natural History & Prognosis

                                      • Treatment

                                        DIAGNOSTIC CHECKLIST

                                        • Consider

                                          • Image Interpretation Pearls

                                            Selected References

                                            1. Ruankham W et al: Prevalence of helminthic infections and risk factors in villagers of Nanglae Sub-District, Chiang Rai Province, Thailand. J Med Assoc Thai. 97 Suppl 4:S29-35, 2014
                                            2. Proceedings of the IV International Giardia and Cryptosporidium Conference, 31 January–03 February 2012, Wellington, New Zealand. Infect Genet Evol. 15:1-94, 2013
                                            3. Lakshmi SP et al: Ascariasis: challenges in the diagnosis of single worm disease. J Indian Med Assoc. 111(9):621-2, 2013
                                            4. Moonah SN et al: Host immune response to intestinal amebiasis. PLoS Pathog. 9(8):e1003489, 2013
                                            5. Kao S et al: Education and imaging. Gastrointestinal: Amebic colitis. J Gastroenterol Hepatol. 24(1):167, 2009
                                            6. Ghonge NP: Gastric migration of intestinal ascariasis: B-mode sonographic depiction. J Ultrasound Med. 27(12):1799-801, 2008
                                            7. Lim JH: Parasitic diseases in the abdomen: imaging findings. Abdom Imaging. 33(2):130-2, 2008
                                            8. Njemanze PC et al: High-frequency ultrasound imaging of the duodenum and colon in patients with symptomatic giardiasis in comparison to amebiasis and healthy subjects. J Gastroenterol Hepatol. 23(7 Pt 2):e34-42, 2008
                                            9. Suzuki A et al: Education and imaging. Gastrointestinal: ascariasis. J Gastroenterol Hepatol. 23(11):1770, 2008
                                            10. Das CJ et al: Imaging of ascariasis. Australas Radiol. 51(6):500-6, 2007
                                            11. Rana SS et al: Parasitic infestations of the biliary tract. Curr Gastroenterol Rep. 9(2):156-64, 2007
                                            12. Ali SA et al: Giardia intestinalis. Curr Opin Infect Dis. 16(5):453-60, 2003
                                            13. McDonald V: Parasites in the gastrointestinal tract. Parasite Immunol. 25(5):231-4, 2003
                                            Related Anatomy
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                                            Related Differential Diagnoses
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                                            References
                                            Tables

                                            Tables

                                            KEY FACTS

                                            • Terminology

                                              • Imaging

                                                • Top Differential Diagnoses

                                                  • Clinical Issues

                                                    • Diagnostic Checklist

                                                      TERMINOLOGY

                                                      • Definitions

                                                        • Enteric infection with roundworm Ascaris lumbricoides
                                                        • Enteric protozoal infection with Giardia lamblia, Cryptosporidium, or Entamoeba histolytica

                                                      IMAGING

                                                      • General Features

                                                        • Radiographic Findings

                                                          • Fluoroscopic Findings

                                                            • CT Findings

                                                              • Ultrasonographic Findings

                                                                • Imaging Recommendations

                                                                  DIFFERENTIAL DIAGNOSIS

                                                                    PATHOLOGY

                                                                    • General Features

                                                                      • Gross Pathologic & Surgical Features

                                                                        • Microscopic Features

                                                                          CLINICAL ISSUES

                                                                          • Presentation

                                                                            • Demographics

                                                                              • Natural History & Prognosis

                                                                                • Treatment

                                                                                  DIAGNOSTIC CHECKLIST

                                                                                  • Consider

                                                                                    • Image Interpretation Pearls

                                                                                      Selected References

                                                                                      1. Ruankham W et al: Prevalence of helminthic infections and risk factors in villagers of Nanglae Sub-District, Chiang Rai Province, Thailand. J Med Assoc Thai. 97 Suppl 4:S29-35, 2014
                                                                                      2. Proceedings of the IV International Giardia and Cryptosporidium Conference, 31 January–03 February 2012, Wellington, New Zealand. Infect Genet Evol. 15:1-94, 2013
                                                                                      3. Lakshmi SP et al: Ascariasis: challenges in the diagnosis of single worm disease. J Indian Med Assoc. 111(9):621-2, 2013
                                                                                      4. Moonah SN et al: Host immune response to intestinal amebiasis. PLoS Pathog. 9(8):e1003489, 2013
                                                                                      5. Kao S et al: Education and imaging. Gastrointestinal: Amebic colitis. J Gastroenterol Hepatol. 24(1):167, 2009
                                                                                      6. Ghonge NP: Gastric migration of intestinal ascariasis: B-mode sonographic depiction. J Ultrasound Med. 27(12):1799-801, 2008
                                                                                      7. Lim JH: Parasitic diseases in the abdomen: imaging findings. Abdom Imaging. 33(2):130-2, 2008
                                                                                      8. Njemanze PC et al: High-frequency ultrasound imaging of the duodenum and colon in patients with symptomatic giardiasis in comparison to amebiasis and healthy subjects. J Gastroenterol Hepatol. 23(7 Pt 2):e34-42, 2008
                                                                                      9. Suzuki A et al: Education and imaging. Gastrointestinal: ascariasis. J Gastroenterol Hepatol. 23(11):1770, 2008
                                                                                      10. Das CJ et al: Imaging of ascariasis. Australas Radiol. 51(6):500-6, 2007
                                                                                      11. Rana SS et al: Parasitic infestations of the biliary tract. Curr Gastroenterol Rep. 9(2):156-64, 2007
                                                                                      12. Ali SA et al: Giardia intestinalis. Curr Opin Infect Dis. 16(5):453-60, 2003
                                                                                      13. McDonald V: Parasites in the gastrointestinal tract. Parasite Immunol. 25(5):231-4, 2003