Defending 200m champion and Olympic gold medalist Kostas Kenteris also dropped out, because of a thigh injury. The Greek sprinter said he did not want to risk serious injury one year ahead of the Athens Olympics.
Drummond, who threw a tantrum after being disqualified from Sunday's 100m quarterfinals for a false start, announced his decision as world track officials were threatening to kick him out of the championships for ``bringing the sport into disrepute.''
He had hoped to run in the 400m relay this weekend.
Tim Montgomery, the 100m world record holder, left for home, further weakening the US relay team, which will be without Maurice Greene, whose six-year reign as 100 champion ended Monday when a leg injury led to his elimination in the semifinals. Montgomery finished fifth in the final and left without giving a reason.
Kelli White moved closer to completing a sprint double after her win in the 100m on Sunday. The American advanced easily into the second round, then won her heat in 22.67 seconds to reach the semifinals.
US teenage sensation Allyson Felix, 17, barely made it past the first round and was knocked out in the quarterfinals, finishing just sixth in her heat.
No Jones
Missing from the field is reigning champion Marion Jones, who is skipping the championships after giving birth to a son on June 28.
The 200m semis are Wednesday and the final Thursday.
Kazak Dmitry Karpov moved into the decathlon lead after five events on the first day with a points total of 4,599. US champion Tom Pappas was second at 4,546, while world-record holder world record-holder Roman Sebrle overcame a slow start to finish the day third at 4,423. Fellow Czech and three-time defending champion Tomas Dvorak lagged sixth. Olympic champion Erki Nool of Estonia dropped out after three events because of a thigh injury. He was third form bottom when he quit.
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