Nesta Carter began the relay and handed to Michael Frater. Yohan Blake ran the third leg before Bolt powered the Jamaican squad home. France finished second in 38.20 seconds, and Saint Kitts and Nevis secured the bronze in 38.49.
Christian Taylor won the men's triple jump, besting defending champion Phillips Idowu of Britain. The American jumped a world-leading 17.96 meters to claim the gold medal, while Idowu posted a leap of 17.77 meters. Another American, Will Claye, finished third.
The United States won gold in the women's 4x100-meter relay. An American quartet of Bianca Knight, Allyson Felix, Marshevet Myers and Carmelita Jeter finished in a time of 41.56 seconds. Jamaica, the defending champs, settled for silver with a time of 41.70, followed by Ukraine.
Defending champion Abel Kirui of Kenya won the men's marathon, while the men's 5,000 meters gold went to Mohamed Farah of Britain.
A pair of Russian women captured gold in their respective events. Tatyana Lysenko won the hammer throw and Mariya Savinova came from behind to beat defending champion Caster Semenya in the 800 meters.