This study will characterize the role of human-associated bacteria in health and disease from a sample set collected in Fiji. The study seeks to find out how people share benign bacteria that live in guts, mouths and skin with each other and with their domestic animals and surroundings. There are several diseases that are spread by bacteria between humans and between humans and their livestock. Through this study, the researchers want to determine how much bacterial sharing goes on between humans and their domestic animals.