(Bloomberg) -- The wife of Carlos Ghosn, the former Nissan Motor Co. chairman jailed in Japan on allegations of financial misconduct, said she was “fearful” about his health after news outlets reported that he has a high fever.

“Japanese authorities refuse to tell us if he has been transferred to an infirmary, nor will they let us speak with medical personnel at the detention center,” Carole Ghosn said in a statement Thursday. “I am pleading with the Japanese authorities to provide us with any information at all about my husband’s health.”

Carole Ghosn said she hasn’t had contact with her husband since his arrest on Nov. 19, and learned of his illness through the media. “We are fearful and very worried his recovery will be complicated while he continues to endure such harsh conditions and unfair treatment,” she said.

Ghosn’s fever prompted Japanese authorities to stop interrogating him, his lawyer, Motonari Otsuru said Thursday. The 64-year-old executive, who’s still the chairman and chief executive officer of French automaker Renault SA, has been locked in a cell with a toilet and wash basin since his arrest.

After almost two months in jail, Ghosn appeared in the Tokyo district court Tuesday to defend himself. He wore a dark suit -- but he also had handcuffs, plastic slippers and a rope around his waist. He was a pale version of the jet-setting car titan who saved Nissan and was the envy of auto executives worldwide. Ghosn appeared thinner and his hair was graying at the roots in his first public appearance since his arrest for alleged financial crimes.

His arrest came after a months-long investigation by Nissan, a probe that was kept from Renault. He has disputed the allegations, which range from under-reporting his income to asking Nissan to cover investment losses.

Renault’s board, meeting Thursday, won’t make any decision on Ghosn’s role, AFP reported, citing an unidentified person close to the company, but will rather discuss the automaker’s internal investigation into his remuneration.

To contact the reporter on this story: Ania Nussbaum in Paris at anussbaum5@bloomberg.net

To contact the editors responsible for this story: Tara Patel at tpatel2@bloomberg.net, ;Anthony Palazzo at apalazzo@bloomberg.net, Frank Connelly

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