The anatomical components involved include the external nose and nasal cavity, the oral cavity and pharynx, paranasal sinuses, larynx, trachea, bronchi, lungs, and thoracic cavity; as well as, the muscles related to their activities or functions.
In tabbies, these feline upper respiratory infections, which are common and very contagious, are more common in areas associated with overcrowding and poor sanitation; for example, in catteries and rescue shelters and also in outdoor feral cat populations (a feral cat or other animal is one that lives in a wild state but was once kept as a pet or lived on a farm).
Several organisms, both bacterial and viral, can cause the feline upper respiratory infection and the two primary viruses usually are feline herpesvirus-1 (FHV) and feline calicivirus (FCV).
Feline Chlamydia, a bacterial infection, can also result in feline upper respiratory tract infections; as well as, other organisms which are spread from felid to kitty through eye, nasal, and oral secretions.
Nosocomial respiratory infections are said to be the most common causes of death that are transmitted in intensive care units or infirmaries.
2. Any of various colored conjugated proteins; such as, hemoglobin, that occur in living organisms and function in oxygen transfer in cellular respiration.