Jaundice can be caused by parasitic protozoans.
 Pathologic causes of neonatal jaundice include:Formula jaundiceHereditary spherocytosisGlucose-6-phosphate dehydrogenase deficiencyPyruvate kinase deficiencyABO/Rh blood type autoantibodiesAlpha 1-antitrypsin deficiencyAlagille syndrome (genetic defect resulting in hypoplastic intrahepatic bile ducts)Progressive familial intrahepatic cholestasisPyknocytosis (due to vitamin deficiency)Cretinism (congenital hypothyroidism)Sepsis or other infectious causes==== Pathophysiology ====Transient neonatal jaundice is one of the most common conditions occurring in newborns (children under 28 days of age) with more than 80 per cent experienceing jaundice during their first week of life
 Thus, the presence of pale stool (stercobilin absent from feces) and dark urine (conjugated bilirubin present in urine) suggests an obstructive cause of jaundice

