This is a very controversial and emotional subject. HBV transmission from MD to patient has clearly been documented, although it's relatively rare. Here are some useful links:
The most comprehensive review I could find was from
SHEA. This was published in 1997. It is a well written article, asking relevant questions and then trying to answer them, using EBM levels of evidence.
JAMA had an editorial about this in 2000 located
here.
The CDC's most current guidelines on this subject appear to be
here. This dates back to 1991 and not likely relevant anymore.
A case-control study of a single surgeon was reported
here in 2002. There are two editorials in this issue also, looking at the issue from different perspectives.
Looking at all of this, here's what I think:
1. The risk of transmission of HBV is very low. Compared with other nosocomial infections that create severe morbidity and mortality in patients, this is really a drop in the bucket. Lack of hand washing and other good hygiene issues are clearly a much bigger public health risk. That being said, this infection can clearly be tracked from doc to patient, which makes it a hot issue.
2. Most people clear the infection. You stated that you are HBeAb positive, which is a very good sign. If the infection clears, then there is no risk and this issue is moot. Following viral loads may be helpful in this regard.
3. Docs who are HBV/HBeAg positive should probably not perform any invasive procedures. Viral loads are extremely high in these patients, and even Universal Precautions seem inadequate to prevent transmission. There is no clear list of what constitutes an invasive procedure, but would clearly encompass all central lines, drainage procedures (thoracentesis, paracentesis). This would include all surgical procedures.
4. As a medical student, you would need to disclose this to your school. You should not participate in the OR, nor be part of procedures. This becomes a complicated issue from a confidentiality standpoint.
5. As a resident, you will need to disclose this to your program. If you plan a career in psych, I would see no problem -- during your IM blocks in internship, there should be no problem letting your resident / someone else do procedures. In IM, there could be a problem -- if you were the senior resident and a procedure needed to be done, you would need to be sure that someone else was in house to do so. Many programs now have faculty in house, or an ICU fellow, etc.
6. Everyone involved in health care should be vaccinated against Hep B. Get vaccinated and have your titer checked!
7. Disclosure to patients remains a very controversial issue. My personal feeling is that if you refrain from performing any invasive procedures, that there is no ethical requirement to disclose your HBV status to patients, given that the risk of transmission is minimal. However, I am sure there are people who would disagree with this. The safest plan is to have some group (i.e. the ethics panel at your hospital, or the state board of medicine) review the situation independently for you.