Garnavillo, Iowa. Garnavillo is a city in Clayton County, Iowa, United States. The population was 745 at the 2010 census, down from 754 at the 2000 census.
Bilirubin is primarily a product of the breakdown of red blood cells by the liver. Elevated bilirubin in urine causes include a malfunction of the liver-resulting in the kidneys performing the filtration responsibilities and therefore causing the bilirubin to be removed through the urine.
Bilirubin is one of the substances produced in the liver which is released in the bile. Bilirubin is a yellow colored pigment that is responsible for the yellow color that we see in the urine. High bilirubin in adults is the characteristic of a condition known as jaundice.