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.
Humans Can Catch Disease and Parasites From Infected Pest Animals. A Zoonotic Disease is a disease that may be passed between animals and humans. This most commonly occurs between birds, rodents, and other pest animals. Below is a partial list of such zoonotic diseases, illustrating part of the reason it's so important to keep pest animals away from humans.