Allergy Planet (49:00)
All around the world, allergies are on the upsurge. Why? In search of an answer, this program travels the globe to examine the complex web of causes of what is amounting to an outright allergy pandemic. Topics include food allergies, pollution-induced asthma, allergies caused by cumulative damage to the skin due to overly aggressive hygiene, allergies to dust mites in the home and off-gassing chemicals found in new construction, and the controversial condition MCS, multiple chemical sensitivity. Also addressed are genetically induced asthma; the LEKTI antibody and its role in Netherton syndrome and the multiple allergies that partially characterize that condition; and imbalances in the antibody IGE, used by the immune system both to fight allergens and to bind to bodily parasites. Confusion of allergies with food intolerances and psychologically induced allergy-like histamine releases are considered as well. A BBC Production. (48 minutes)
Generational Allergies (04:53)
On Tristan da Cunha, the world's most remote inhabited island, a scientist studies generational asthma that affects every family on the island. Of the island's original settlers, 50% had asthma.
Asthma: Genetic Link (02:47)
A team of genetic scientists discovers a gene that they believe is linked to asthma. If the gene is faulty, collagen is overproduced, constricting the airways and making breathing difficult. There are other causes of asthma too.
Skin Barrier and Allergies (05:05)
A boy with Netherton Syndrome has red, scaly skin and brittle hair. His rare disease is genetic, and he suffers from multiple allergies. Scientists isolate the gene responsible for Netherton Syndrome. The skin becomes an imperfect barrier against allergens.