Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns.
As per your complain in case if someone has an infected tooth, infection is commonly not transmitted to another person by coming in contact in saliva although
throat infection can be contagious and when there is active infection it can be transmitted to other people via close contact like kissing, sharing utensils and napkins and especially viral throat infection is very quickly transmitted..
In case if your husband had an
abscess in his tooth and if it would be draining then it it comes in contact with blood of your son it can cause infection although will be minor infection and not commonly very severe..
So you need not to be extremely worried..
I would suggest that your husband should
consult a Dentist and get evaluated and an IOPAR [ x ray] can help in diagnosis..
In case if tooth can be saved
root canal treatment can be done while if there is gross decay extraction followed by antibiotics and painkillers will be advisable..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.