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 an orange-yellow pigment and a waste product. A bilirubin test may be used to help determine the cause of jaundice and/or help diagnose conditions such as liver disease, hemolytic anemia and blockage of the bile ducts.