Flanker Abbott faces a lengthy spell on the sidelines after suffering a serious knee injury in Worcester's LV= Cup defeat to Leicester last Friday. The 25-year-old openside ruptured his anterior cruciate ligament in the 21-18 reverse, just moments after scoring his first try of the season.
Abbot requires surgery to correct the problem and may even miss the remainder of the season given the severity of the setback, although no date has yet been set for a possible return.
"Jake's loss leaves a big hole. We'll miss his relentless energy," said Warriors boss Dean Ryan, who has seen his side lose seven straight Aviva Premiership fixtures this season and fail to record a win in the Amlin Challenge Cup.
"However, I have no doubt that Jake will approach this challenge with the same determination and commitment that he always displays around the club."
Abbott has played in every single one of the Warriors' 11 games so far this season, including both Amlin Challenge Cup ties against Oyonnax and Sale Sharks. The Warriors drew their European opener in France before being beaten by the Sharks at Sixways in Round 2 and they currently sit seven points off the pace in Pool 1.
Worcester return to domestic action against Sale this Friday and then face Northampton before turning their attentions to their must-win European double header with 2012 Amlin Challenge Cup kings Biarritz Olympique next month.