Since president Mohamed Morsi was ousted by the military in July, Egypt's interim government has been incensed by Al-Jazeera television's coverage of a deadly crackdown against the Brotherhood to which the deposed Islamist belongs.
On January 30, prosecutors referred to trial 20 people they said worked as journalists for Al-Jazeera, accusing them of portraying Egypt in a state of "civil war" and "airing false news".
The Qatar-based network said last week that only "nine network staff are on the list of 20, meaning most of those named are not employees of Al-Jazeera."
Of the 20, only eight are in detention --including Greste and Al-Jazeera English's Cairo bureau chief, Canadian-Egyptian Mohamed Adel Fahmy.
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The others are being sought, the prosecution said.
The 16 Egyptians have been charged with belonging to a "terrorist organisation... And harming national unity and social peace".
The four foreigners are accused of "collaborating with the Egyptians by providing them with money, equipment, information... And airing false news aimed at informing the outside world that the country was witnessing a civil war."
She also said she could have been implicated in the case over a conversation she had with Fahmy in a hotel lobby in December.
"I never worked for Al-Jazeera, ever," she wrote on Twitter.
Greste, Fahmy and Egyptian producer Baher Mohamed were arrested on December 29 at their makeshift office in a Cairo hotel.
Fahmy, a well-known journalist in Cairo who previously worked with CNN, has no known ties with the Brotherhood.