Intestinal Parasites: Helminths, Cestodes, Protozoa (and other ...
Intestinal Parasites: Helminths, Cestodes, Protozoa (and other ... Intestinal Parasites: Helminths, Cestodes, Protozoa (and other ...
Strongyloides stercoralis • Penetrate skin • Lungs • GI tract – Adults in Duodenum – Eggs hatch in intestine – Autoinfective Cycle • Visceral Migration • Larvae (not eggs) excreted in stool
Autoinfection and Hyperinfection Autoinfection • Eggs hatch in intestine, larvae in intestine can penetrate to increase infection without reinfection from outside world • Persistence of infection for decades in untreated host Hyperinfection • Immunosuppression (steroids, chemotherapy) leads to multiple rounds of autoinfection • Visceral migration and dissemination to multiple organs, including brain
- Page 1 and 2: Intestinal Parasites: Helminths, Ce
- Page 3 and 4: Learning Objectives 2: Presentation
- Page 5 and 6: Part 2: Overview • Helminths - Ro
- Page 7 and 8: Ascaris lumbricoides • Ingest egg
- Page 9 and 10: • Diagnosis: Ascariasis: Diagnosi
- Page 11 and 12: Case 2 A 12 year old F presents to
- Page 13 and 14: Tricuriasis • Clinical Manifestat
- Page 15 and 16: You conduct a school visit at an el
- Page 17 and 18: Hookworm: Clinical Manifestations
- Page 19 and 20: • Diagnosis: - Stool O+P • Trea
- Page 21: Case 4 • You are evaluating a 6 y
- Page 25 and 26: Strongyloides: Diagnosis and Treatm
- Page 27 and 28: Case 5 An 18 year old previously he
- Page 29 and 30: Taeniasis • Life cycle: ingest cy
- Page 31 and 32: Neurocysticercosis • Cysticerci e
- Page 33 and 34: Case 5 (continued) You obtain a STA
- Page 35 and 36: Echinococcus granulosus • Ingest
- Page 37 and 38: Echinococcus: Diagnosis and Treatme
- Page 39 and 40: Case 7 You are running a new‐immi
- Page 41 and 42: Amebiasis: Clinical Manifestations
- Page 43 and 44: Case 7 (continued) As you recognize
- Page 45 and 46: Giardia Lamblia • Flagellated pro
- Page 47 and 48: Giardia: Diagnosis and Treatment
- Page 49 and 50: A 10 year old female presents for c
- Page 51 and 52: Schistosomiasis: Clinical Manifesta
- Page 53 and 54: Schistosomiasis: Diagnosis and •
- Page 55: References • Bethony J, Brooker S
Autoinfection <strong>and</strong> Hyperinfection<br />
Autoinfection<br />
• Eggs hatch in intestine,<br />
larvae in intestine can<br />
penetrate to increase<br />
infection without<br />
reinfection from outside<br />
world<br />
• Persistence of infection<br />
for decades in<br />
untreated host<br />
Hyperinfection<br />
• Immunosuppression<br />
(steroids,<br />
chem<strong>other</strong>apy) leads to<br />
multiple rounds of<br />
autoinfection<br />
• Visceral migration <strong>and</strong><br />
dissemination to<br />
multiple organs,<br />
including brain
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