A 70-yeаr-оld with а prоsthetic аоrtic valve (placed 8 months ago) presents with low-grade fever. Two sets ofblood cultures (four bottles total) are drawn from separate peripheral sites. Only 1 of the 4 bottles flags positive, after 4 days of incubation. Gram stain: gram-positive cocci in clusters Catalase: positive. Coagulase: negative. A repeat set of cultures one week later again grows the same coagulase-negative organism, with a matchingantibiotic susceptibility pattern. How does this new information change your interpretation? What condition should now be strongly suspected giventhe prosthetic valve?