The word ‘parasite’ comes from Greek word ‘para’ meaning ‘besides’ and ‘sitos’ meaning food. The standard definition of the word usually implies that one organism living off of, and thereby benefitting from, a host.
Parasites, small microscope animals that need a host to survive, are transmitted through the fecal oral route.
They gets its nutrient directly from the host. The parasites lives with its host for an extended period of time.
Moreover, the parasite always does damage in some degree to its host.
They live in the intestines of human and other animal hosts. Some flatworms can lives inside their host for most than thirty years.
They are excreted in the feces and enter a new host though feces contaminated drinking water, contaminated water on produce, manure used as fertilizer, carcasses that become contaminated during the slaughter process, and poor personal hygiene of food handlers.
The human body has various mechanisms to protect itself from a parasite invasion. The skin is a major protector. Another protector is found in our blood which contains certain substances that prove deadly for trypanosomes, a certain class of parasites.
A key part of protecting against parasites is having a healthy body.
Parasites
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