Hi Mima,
Congrats on the transplant! I am happy to hear you're both doing well!
Here's a related thread: "advice for transplant patient/gardening?"
http://ths.gardenweb.com/forums/load/care/msg0514413023920.htmlOur doctor said it's basic common sense, don't handle chicken droppings used in compost (unless it's sterilized) or dig where pets may have relieved themselves, or inhale a bunch of dust or dirt.
This is from the Center for Disease Control: "Hand washing after gardening or other contact with soil might reduce the risk for cryptosporidiosis and toxoplasmosis."
There are a lot of tips of "Recommendations to Help Patients Avoid Exposure to Opportunistic Pathogens" if you really want to freak yourself out here
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr4810a2.htm but keep in mind it was written 8 years ago and patients are not taking as heavy a regime of immunosuppressants as they had in the past.
I just went to a garden talk today called "Tomatomania" and I am really inspired to grow lots of tomatoes this year! I hope your husband enjoys the gardening!