Reactive arthritis is defined as joint inflammation caused by a sterile inflammatory reaction following a recent infection. Of the following, the LEAST likely micro-organism that may cause reactive arthritis is

Reactive arthritis is defined as joint inflammation caused by a sterile inflammatory reaction following a recent infection. Of the following, the LEAST likely micro-organism that may cause reactive arthritis is

Recurrent parotitis is the MOST common manifestation in children with primary Sjogren syndrome between 9-10 years of age.

The BEST treatment for a 5-year-old boy with Henoch-Schonlein purpura (HSP) presenting with acute onset palpable purpura over the lower extremities and buttocks is

The MOST common clue of physical abuse in children is

A 2-year-old child with failure to thrive, recurrent wheezing, and pulmonary infections. Of the following, the LEAST common cause of his illness is