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Chapter 23 Lecture 5 (Helminthic Infestations of the Intestinal Tract…

- - - - Life cycle split between primary and intermediate hostEnter the environment in feces from infected humans
      - Humans get from eating raw or undercooked meat that have the cysticeri
      - Infested human hosts pass approximately 6 proglottids /day (They can average 1000) Segments. In each proglottids has about 50,000 eggs. (each tapeworm Pig, or beef have different proglottids and therefore a different number of eggs
  - - - Regions of inadequate sewage treatment
      - Regions where humans live in close contact with livestock
- - - - Nematodes as a group have variable reproductive strategies that make them highly successful parasites
      - After mating in the colon the female migrates at night to the anus where they deposit the eggs. Then go back to the colon.
      - Scratching dislodges the eggs onto clothes or bedding where they dry and become aerosolized and settle in water or on food where it is consumed
      - Also on skin and fingernails so people re-infest themselves