Why does Malaria cause Jaundice ?
Jaundice in malaria, often termed as 'malarial hepatitis' is a common manifestation of cerebral malaria. Presence of jaundice in malaria is an indicator of severe and complicated illness. When the malaria parasite attacks a person it causes fever, recurring chills, anaemia and jaundice in some of the cases. Destruction of red blood cells by the malaria parasite often results in jaundice. There are many underlying factors that can lead to jaundice in malaria. Some of the causes of jaundice in malaria are as follows: Direct cause Malarial Hepatitis: The term malarial hepatitis (inflammation of the liver) has been used for describing the occurrence of jaundice in a patient suffering from malaria, especially cerebral malaria. The condition is characterised by a rise in the bilirubin serum (a blood serum) along with the rise in levels of glutamate pyruvate transaminase three times above the normal level. Results of a study done by Murthy and his research group showed that, 20 out of 95 patients who were admitted with cerebral malaria had symptoms of malarial hepatitis. According to them, patients of malarial hepatitis are more prone to severe renal infections and finally jaundice. I ntravascular hemolysis of parasitised red blood cells (RBC): Excessive intravascular hemolysis (bleeding) in patients of malaria also causes jaundice. Hemolysis also results in increased levels of bilirubin in the blood. Indirect cause: Disseminated Intravascular Coagulation (DIC) is also associated with severe manifestation of malarial illness. Microangiopathic (microvascular disease) hemolysis associated with DIC is the common causes of jaundice in severe malaria. Deficiency of an enzyme named glucose-6-phosphate dehydrogenase (G6PD) is the main cause of hemolysis and jaundice in malaria patients. In some of the cases anti-malarial drugs that are taken for the treatment of malaria can lead to jaundice as well. For instance, Mefloquine; an effective drug for cerebral malaria poses some side-effects that can affect liver function. Malaria patients with co morbidity of any liver disease must not be prescribed Mefloquine. Unrelated cause: Coexisting acute viral hepatitis: Patients of malaria are more prone to developing jaundice when there is presence of other viral hepatitis as well. Presence of other chronic hepatitis.
