Home » Products » Veterinary diagnostics » Ruminants » Rift Valley Fever Virus (RVFV) » ID Screen® Rift Valley Fever IgM Capture Back Rift Valley Fever Virus (RVFV) ID Screen® Rift Valley Fever IgM Capture ELISA IgM Antibody Capture (MAC) ELISA for the detection of anti-nucleoprotein IgM antibodies in ruminant serum and plasma The detection of anti-IgM antibodies indicates recent infection. This test does not contain any virus particles.