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.
There are diseases that can be transferred to humans from psittacine birds, such as parrots and budgies, such as a viral infection. In addition, people can also show an allergic reaction to feathers and other bird products.
Credit: AP Photo/Petar Petrov. Catch scratch disease A bacterial infection, cat scratch disease - a.k.a. cat scratch fever - can spread to humans via the bite or scratch of an infected feline. Most people with CSD develop a mild infection, though some get swollen lymph nodes, fever, and fatigue. The illness can be particularly severe for people with reduced immunity.