The bark of certain yew trees can yield a medicine that fights cancer.Now scientists find the dirt that yew trees grow in can supply the drug as well, suggesting a new way to commercially harvest the medicine.Scientists originally isolated the drug paclitaxel-now commonly known as Taxol-in 1967 from the bark of Pacific yew trees (Texus brevifolia) in a forest near the Mount St.Helens in Washington.This yew also yields related compounds known as taxanes that can be converted to paclitaxel.Research since then has revealed other yew species generate paclitaxel and taxanes as well,as do some fungi and certain hazelnut varieties.
Causes Parasites External parasites are notorious for causing alopecia in dogs. Ticks, lice, fleas and mites can all cause intense itching and scratching, which leads to hair loss. Mange (a skin disease) may also cause localised to generalised hair loss. Fungal infections Fungal infections of the skin (called ('Dermatophytosis') can cause partial to complete alopecia with scaling and redness. Some fungal infections are zoonotic, which means that they have the potential to cause skin lesions in people as well. Bacterial infections Bacterial skin infections can cause alopecia with redness, skin crusting and circular patterns of hair loss. Bacterial folliculitis is the most common cause of multi focal alopecia. Allergies Allergic pets have itchy skin, and in response they scratch or chew out their hair. Pets can be allergic to: 1. Foods- Grains (wheat, soy, corn, pork, meat, fish, milk, yeast. 2. Contact allergies- Walking through grass, chemically treated floors or ...
Comments