In the State of Ohio, one of the newborn screen tests is pol…

In the State of Ohio, one of the newborn screen tests is polymerase chain reaction (PCR) for the DNA excision circles that are generated during the D-J and V-D gene rearrangements of the beta chain of the T-cell receptor.  This newborn screening test is screening for which of the following diseases:

A patient presents to his doctor three weeks after the start…

A patient presents to his doctor three weeks after the start of an acute illness that clinically resembled infectious mononucleosis.  The heterophile antibody test is negative, and the components of a follow-up EBV (Epstein Barr Virus) serologic profile (VCA IgM, VCA IgG, and EBNA IgG) are all negative.  Which of the following viruses is the most likely to have this clinical presentation and these lab findings?