Not really, its mostly a manga plot device :P. Of course you could say that the severe mental stress caused immunosuppression(from excess corticosteroids released because of it). err so in that case its a trigger, because he got an infection that spread to the liver :huh
Even if thats the...
The GOT and GPT they are referring to is actually SGOT and SGPT - also known as AST and ALT. They are enzymes present in the liver and are increased in blood when there is liver cell damage(enzymes inside the cell go to the blood).
Oh and the bacteria getting into the liver thing : most...