title: Chronic diarrhea in a 5 1/2-month-old infant.
mesh_terms: D000361:Agammaglobulinemia / Q000235:genetics; D003937:Diagnosis, Differential; D003968:Diarrhea, Infantile / Q000175:diagnosis*; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D007223:Infant; D008297:Male; D014960:X Chromosome / Q000502:physiology
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M