Seroconversion, or the development of HCV antibodies can take up to six months to occur; this from the U.S. CDC:
“How soon after exposure to HCV can anti-HCV be detected?
HCV infection can be detected by anti-HCV screening tests (enzyme immunoassay) 4–10 weeks after infection. Anti-HCV can be detected in >97% of persons by 6 months after exposure.”
http://www.cdc.gov/hepatitis/HCV/HCVfaq.htm#section3
Most cases will be detectable prior to six months; however in immunocompromised individuals such as those with HIV/AIDS, the process might take longer—
--Bill
It it advised to have an antibody test 3-6 months after exposure as it can take that long for the antibodies to be detected in the blood. However, an HCV RNA by PCR test can detect active HCV virus two weeks after exposure.
Trinity
From my knowledge it should be seen within the month. HepB can make you yellow within the month but HepC like mine was not tested for and was there for 40 years before being discovered due to varicies rupturing and vomiting blood although i had been in surgery 5 times in my life and it wasnt tested for so within a month i would be tested.