Duplicate Meals Research Articles

Dietary potassium and hypertension: epidemiologic data.

The strong geographic and social class differences in blood pressure may be related to differences in potassium intake or in the ratio of sodium to potassium intake. "Low salt" populations also have high potassium intake. In Japanese villages, populations with similar salt intake but different blood pressures had different potassium intake. In one study, a significant correlation was found between urinary Na/K ratio and blood pressure. Another study showed a significant negative correlation between potassium excretion and blood pressure. Four studies are available that show that blacks excrete much less potassium than whites. One of these studies also showed, by analyzing duplicate meals, that blacks consumed much less potassium than whites. A high potassium diet tends to be more expensive than a low potassium diet. Potassium intake may be a major factor in the epidemiologic differences of hypertension.

The measurement of food and energy intake in man—an evaluation of some techniques

A dietary survey was carried out on an Antarctic base over a period of 6 to 12 months on twelve individuals. Three methods of determining individual food and energy intake were used-weighing and recording of food as eaten in combination with food tables, dietary recall, and bomb calorimetry of duplicate meals. Use of weighed food intakes and food composition tables underestimated energy intake by 7% when compared to analysis of duplicate meals by bomb calorimetry. One week was found to be the most practical period over which intake should be measured to determine "habitual" food intake.

VIBRIO PARAHÆMOLYTICUS GASTROENTERITIS AND INTERNATIONAL AIR TRAVEL

An outbreak of food-poisoning caused by the marine organism Vibrio para-hæmolyticus on an international charter airflight from Bangkok to London is described. This is the first such outbreak recognised in Britain. The food vehicle was cooked white crab meat in hors d'œuvres prepared at Bangkok. Kanagawa-positive strains of serotype O2/K3 were isolated from patients and from dressed crab meat in duplicate meals, as well as from raw crab meat, whole crabs, and crab claws.