9

A 9 month old baby was diagnosed as methemoglobinemia after having repeated diarrhea. Bottle feeding has been practiced since birth but there was no similar attack before. The water source was said to be from an old private well.

A. Oxygen hemoglobin dissociation curve shifts to right

B. The affinity of hemoglobin for oxygen declines

C. Methylene blue can be the cause

D. Cherry red appearance is the typical presentation

E. Enteric bacterial action on nitrate metabolism may have a role