Blood type A people may be more likely to get traveler's diarrhea

A study published in the Journal of Clinical Investigation reveals that a specific strain of E. coli is more likely to cause diarrhea in individuals with blood type A. Researchers from Washington University and Johns Hopkins University discovered that this strain secretes a protein that binds to sugar molecules on type A blood cells, which are also found in the gut linings of these individuals. In an experiment involving 106 healthy volunteers, those with blood type A or AB were more likely to develop moderate to severe diarrhea compared to those with blood types O or B.

What institutions conducted the research on the E. coli strain?

What specific protein does the diarrhea-causing strain of E. coli secrete?

How does the E. coli strain interact with blood type A cells?

What was the percentage of Type A or AB volunteers who developed diarrhea after the experiment?

What were the blood types of the volunteers who experienced less severe diarrhea?