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.
Chagas Disease: Spread by blood sucking assassin bugs, this disease is caused by the protozoa Trypanosoma cruzi, which is passed on to the secondary hosts, humans, when these bugs feed on the hosts' blood, and defecate immediately near the site of the bite.iardiasis: This is a form of diarrhea caused by the infectious protist Giardia lamblia. Giardia cysts can be transmitted on coming in contact with an infected person, who does not maintain proper personal hygiene, or by coming in contact with contaminated water.