should i be concerned
Probably not
should i get him checked
If it would make you feel better it wouldnt hurt to be sure.
I agree with Carlhcv. They tell you not to use articles of personal hygiene like other people's razors, nail clippers etc. That is because HCV can be passed through dried blood. While it is unlikely that your son picked up hepatitis from using a patient's knife, as a mom you will continue to worry. A viral load test would be best and more definitive than an antibody test. He can have that between 3-4 weeks post exposure. It sounds as though your son did not cut himself with the knife, I really would not worry about this. But get the test for peace of mind.
Have him tested for the HCV antibody in a month or two for your own peace of mind. It's a cheap test.
the blood would have to have been very fresh and I'm kinda doubtful that your son would pick up a knife with blood all over it
even if he is just 9
serious, I think you have nothing to worry about
even if it is possible the person with hep may have cut themselves before with thw same blade?
don't worry about it
A person who has Hep C does not contaminate Everything they own and it is actually fairly difficult to contract now that blood is routinely screened for the virus
It has to be blood to blood contact - fresh blood to fresh blood
From the Center for Disease Control:
How is Hepatitis C spread?
Hepatitis C is usually spread when blood from a person infected with the Hepatitis C virus enters the body of someone who is not infected. Today, most people become infected with the Hepatitis C virus by sharing needles or other equipment to inject drugs. Before 1992, when widespread screening of the blood supply began in the United States, Hepatitis C was also commonly spread through blood transfusions and organ transplants.
People can become infected with the Hepatitis C virus during such activities as
Sharing needles, syringes, or other equipment to inject drugs
Needlestick injuries in health care settings
Being born to a mother who has Hepatitis C