More On Parasitic Worms

Pinworms

Worm eggs may survive if present.

Incoming excrement may contair viruses, wo protozoa and bacteri;

Worm eggs may survive if present.

toilets, the eggs of some intestinal parasites, if present, may survive the "composting" process.

temperatures of most commercial composting toilets and mouldering

Due to the low composting

Figure 7.5

toilets, the eggs of some intestinal parasites, if present, may survive the "composting" process.

Transmission of Pathogens Through Low-Temperature Composting Toilets temperatures of most commercial composting toilets and mouldering

Due to the low composting

Figure 7.5

culated that they got them from our compost. We were also told to worm our cats to prevent pinworms in the kids (these rumors allegedly originated in a doctor's office). Yet, the pinworm life cycle does not include a stage in soil, compost, manure or cats. These unpleasant parasites are spread from human to human by direct contact, and by inhaling eggs.

Pinworms (Enterobius vermicularis) lay microscopic eggs at the anus of a human being, its only known host. This causes itching at the anus which is the primary symptom of pinworm infestation. The eggs can be picked up almost anywhere. Once in the human digestive system they develop into the tiny worms. Some estimate that pinworms infest or have infested 75% of all New York City children in the three to five year age group, and that similar figures exist for other cities.34

These worms have the widest geographic distribution of any of the worm parasites, and are estimated to infect 208.8 million people in the world (18 million in Canada and the U.S.). An Eskimo village was found to have a 66% infection rate; a 60% rate has been found in Brazil, and a 12% to 41% rate in Washington D.C.

Table 7.14

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