Importance and Value of Trees. Since the beginning, trees have furnished us with two of lifeâs essentials, food and oxygen. As we evolved, they provided additional necessities such as shelter, medicine, and tools. Today, their value continues to increase and more benefits of trees are being discovered as their role expands to satisfy the needs created by our modern lifestyles.
However, the most serious is called psittacosis. With this disease, an agent called Chlamydia psittaci causes it, and the disease is also called ornithosis. Birds can be asymptomatic carriers, and may only fall ill when upset, as stress is a major component in all avian diseases.
Mad cow disease is a fatal disease that slowly destroys the brain and spinal cord (central nervous system) in cattle. It also is known as bovine spongiform encephalopathy, or BSE. People cannot get mad cow disease.But in rare cases they may get a human form of mad cow disease called variant Creutzfeldt-Jakob disease (vCJD), which is fatal. This can happen if you eat nerve tissue (the brain and spinal cord) of cattle that were infected with mad cow disease.Over time, vCJD destroys the brain and spinal cord.xperts are not sure what causes mad cow disease or vCJD. The leading theory is that the disease is caused by infectious proteins called prions (say PREE-ons). In affected cows, these proteins are found in the brain, spinal cord, and small intestine.