Tapeworms come into the body via contaminated food. Many organisms live on and in the human body. A tapeworm can easily survive and thrive indefinitely inside us. A tapeworm in a human can range in length from 1/250 of an inch (.0063 cm) to an incredible 50 feet (15.23 meters)! Tapeworms have no digestive tract so they must eat food already digested by another animal. That is precisely what they do as a parasite inside our intestines.
The hazard: Glutaraldehyde is a toxic chemical that is used for cold sterilization of medical and dental equipment. It is in Cidex and other products. Glutaraldehyde can cause severe irritation of the eyes, nose, throat, lungs, nausea, headaches, drowsiness, and dizziness.
1 Glutaraldehyde is probably the most commonly used EM fixative and is normally supplied at concentrations of 25 or 50% and used at concentrations of 0.5-2%. 2  The molecular weight of glutaraldehyde is 100.12 g/mol and at a 1% concentration will have a molarity of 0.1 mols/litre. Formaldehyde is a common fixative for light microscopy and is often used on its own. 2  However, for EM it often doesn't provide enough stability for all of the sample preparation steps and ultrastructure can be poor.