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[Clinical Picture] Typhoid carriage in the gallbladder

The case of Mary Mallon, an asymptomatic carrier who infected 51 people while working as a cook and laundress in New York in 1906–15, showed that Salmonella enterica serovar Typhi (S Typhi) is able to lurk in the gallbladder without overt clinical signs and spread enteric fever through person-to-person transmission.