Hello!
Firstly let me congratulate you on your awareness about needle-prick injuries. It's commendable you got all the valid tests done, and you probably have understood that all are negative.
Now to answer your queries:
1) There are other blood borne diseases besides
HIV, HBV and HCV, but they are not transmitted via needle stick injuries.
2) Bilirubin, especially indirect Bilirubin (the one increased in your father's report) can be high if there is an increase in breakdown of RBCs (red blood cells), which are a component of Hemoglobin. This most commonly occurs in
Vitamin B12 and Folate deficiencies
3) HAV and HEV are transmitted through the faeco-oral route, and are NEVER blood borne. HDV is an exclusive super-added infection of HBV positive patients.
Next Steps
You have not mentioned your father's underlying medical conditions. If he is at high risk for blood borne infections, like getting frequent injections, or if he is on dialysis, he might be in the window period for
HIV, HBV, and HCV (ie he has the infection, but tests are negative). It is advisable to repeat tests for HIV, HBV and HCV after 3 months.
Health Tips
Please also do
Vitamin B12 and Folate levels, so that he can be prescribed appropriate supplements.