Bury came from behind to win at Dean Court as Bournemouth were left to rue the first-half chances they squandered.
Cherries striker Wes Thomas had fired wide twice early on, but he turned provider for ex-Shakers winger Marc Pugh who hooked the home side ahead.
Thomas missed a good chance to make it 2-0 before Peter Sweeney centred for Giles Coke to level from close range.
Andy Bishop nodded in Phil Picken's cross just after the break, and Bury held firm despite a late onslaught.
Bournemouth also lost two more players to injury, with midfielder Harry Arter and his replacement Joe Partington both forced off.
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Bournemouth manager Lee Bradbury spoke to BBC Radio Solent:
"I thought we started really well but didn't capitalise on it and let them back into the game.
"I was excited about the Wes Thomas and Michael Symes partnership and at times they showed they linked up quite well but it wasn't consistent enough.
"I want to change the home performances to be like they were last year. I want teams to go away from here thinking a point is a good point."
Bury manager Richie Barker told BBC Radio Manchester:
"I thought the players were absolutely fantastic today.
"There were some negatives in the first half and if their finishing had been better, we'd have been dead and buried at half-time.
"I'm absolutely delighted for him (Andy Bishop) because he's been fantastic for the past three weeks."