NURSES hired on contract in Uasin Gishu have been sacked by the county government.
They did not allegedly sign evaluation forms by the county government two months ago.
The nurses filed a lawsuit against Uasin Gishu county government to demand permanent positions.
The Kenya National Union of Nurses has condemned the move, terming it illegal.
County Health officer Wilson Kemei signed termination letters for the more than 100 nurses.
They served in the national government before being moved to counties.
Health executive Dr Eunice Siria refused to comment.
"The matter is in court, I desist any comments," she said in a text message.
Union officials pledged to stage a workers' strike from September 3 if the move is not cancelled.
"Despite concerted efforts to ensure the nurses hired under the Economic Stimulus Programme and other health workers are put on permanent and pensionable terms on, the county government has terminated their services with effect from September 1," says a letter by the union to the county government.
The letter was signed by Uasin Gishu union officials John Bii (secretary general) and Simon Kibii (chairman).
"The county chief officer of health has no standing to write and sign termination letters on behalf of county Public Service Board, which is an independent body," said Bii.