Susan C. Baker throughout the body. This disease also affects skin, mucous membranes, and the body's lymph nodes. Baker's lab is investigating the possibility of a viral causative agent for the disease. This disease mostly affects children under the age of 5. Causes remain unknown, however it is treatable within days if the symptoms are recognized early enough. If left untreated, it can lead to serious problems for the heart. Baker has also worked closely with coronaviruses, the causative agent of Severe Acute Respiratory Syndrome. These are viruses that affect mostly the upper respiratory and GI tract of humans and are named because
Coeliac disease in part due to changes in diagnostic practice. There also appears to be an approximately 4.5 fold true increase that may be due to less exposure to bacteria and other pathogens in Western environments. Humans first started to cultivate grains in the Neolithic period (beginning about 9500 BCE) in the Fertile Crescent in Western Asia, and it is likely that coeliac disease did not occur before this time. Aretaeus of Cappadocia, living in the second century in the same area, recorded a malabsorptive syndrome with chronic diarrhoea, causing a debilitation of the whole body. His "Cœliac Affection" ("coeliac" from Greek