What can cause an increase in ALT, if the results of tests for viral hepatitis negative. May be associated with Toksikarozom? Could it be in the Sverdlovsk region: DNA hepatitis TTV?

Respond Tatyana Stepanova, a gastroenterologist, hepatologist increase in ALT may be caused by different reasons: the toxic effects of alcohol, drugs, etc. Hepatitis TTV could be anywhere, including in the Sverdlovsk region. Similar question: "... the body by the results of analysis: the hepatitis B virus DNA .. copies ...