Which virus is most likely responsible for the described reticular rash with joint symptoms in a child after a recent viral URI?

Which virus is most likely responsible for the described reticular rash with joint symptoms in a child after a recent viral URI?

• A. Parvovirus B19
• B. Varicella-zoster virus
• C. Rubeola virus
• D. Coxsackievirus

Answer: (A)

A lace-like, reticular rash that appears after a recent viral URI in a child, along with joint symptoms, is classic for Parvovirus B19 infection (erythema infectiosum). The typical course starts with mild fever and malaise, followed by the characteristic facial “slapped cheek” rash, and then a second phase with a lacy, reticular eruption on the trunk and limbs. Joint pain or swelling can occur, especially in older children and adolescents, and may accompany the rash. This pattern helps distinguish it from other viruses: Varicella-zoster causes vesicular lesions in crops; Rubeola (measles) presents with a febrile maculopapular rash starting on the face and spreading, with cough, coryza, and conjunctivitis; Coxsackievirus often causes hand-foot-mouth disease or herpangina rather than a reticular rash with arthritis.

A lace-like, reticular rash that appears after a recent viral URI in a child, along with joint symptoms, is classic for Parvovirus B19 infection (erythema infectiosum). The typical course starts with mild fever and malaise, followed by the characteristic facial “slapped cheek” rash, and then a second phase with a lacy, reticular eruption on the trunk and limbs. Joint pain or swelling can occur, especially in older children and adolescents, and may accompany the rash. This pattern helps distinguish it from other viruses: Varicella-zoster causes vesicular lesions in crops; Rubeola (measles) presents with a febrile maculopapular rash starting on the face and spreading, with cough, coryza, and conjunctivitis; Coxsackievirus often causes hand-foot-mouth disease or herpangina rather than a reticular rash with arthritis.