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.
Causes of Bilirubin in Urine. There are a number of possible causes for the presence of bilirubin in urine. Here are the most common causes: â¢ Blocked common bile duct â The common bile duct is where the bilirubin passes through for screening before it is transferred to the large intestines.