]> 2026-07-31T09:38:57+00:00 WBR0052 0 en Polyribosylribitol phosphate Peptidoglycan Protein A Lipid A M protein Microbiology A 6-year-old African American boy is brought to the emergency department for severe abdominal pain. He reports his abdomen is stiff and bloated with diffuse pain that is most severe in the left upper quadrant. The patient has had a previous similar episode in the past. His past medical history is also significant for dactylitis at the age of 18 months. Further questioning reveals that his older sister suffers from similar painful episodes that also require hospitalizations. After supportive measures, this patient is requested to receive a vaccine for an encapsulated, catalase-positive, gram-negative rod. What moiety is used in this vaccine? A General Principles Infectious Disease 2020-10-27T23:10:19Z 2459150.4654977 WBR0052