The Mexico international returned to parent club Bournemouth for treatment to a thigh issue after missing the recent Premiership games against Motherwell and Dundee United.
The south coast club have now diagnosed a quad strain expected to rule the Mexican defender out until early May.
Speaking before the international break Parkhead manager Martin O’Neill expressed uncertainty over how many games the 24-year-old might miss.
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While the precise timescale of his absence hinges on his reaction to treatment it remains to be seen whether the English Premiership side sanction Araujo’s return before the end of the season.
A Celtic fans’ favourite the full-back posted an image of an egg timer on social media last week, fuelling speculation over how long he would be sidelined.
Signed as cover for long-term absentee Alistair Johnston the Canadian international defender is edging closer to a return to action after surgery for persistent hamstring issues.
Hopeful of a return in time for the top six split towards the end of April, Johnston says he hopes to be fit for the final five league games.
“In an ideal world I would like to be back in time for the split,” said the 27-year-old. “And I think that’s a realistic target, but at the same time none of us are writing anything in stone.
“But if I need an extra week then I will take an extra week. I don’t have an exact date. We will all take it week by week.”
A season blighted by long-term injuries the champions have gone without central defender Cameron Carter-Vickers and Portuguese winger Jota.