Eleven learners at Sacred Heart Mukumu Girls High School have been admitted to hospital after falling ill on Friday.
Two of the learners are being treated for malaria while nine others were rushed to hospital after complaining of abdominal pain and fatigue.
The students were admitted to St Elizabeth Mukumu Mission Hospital and doctors are closely monitoring their condition.
The principal of the school, Sister Jane Mmbone, confirmed the incident but said there was no cause for alarm as the students were responding well to treatment. “In fact, three of the students have been discharged after their condition improved and are back in school,” said Mmbone.
She said the other pupils reported back to school before they had fully recovered and were being treated and their condition closely monitored.
A nurse has been posted at the school to deal with any emergencies involving students who fall ill before they are referred to nearby hospitals for treatment.
The school was closed indefinitely on April 3 following an outbreak of an illness linked to contamination of water and food.
Three students and a teacher lost their lives.
On 15 April, Education Cabinet Secretary Ezekiel Machogu ordered the destruction of the maize to prevent another tragedy.
Last month, a post-mortem examination of the three students and their teacher revealed that they had succumbed to multiple organ failure linked to food poisoning and water contamination.
The school management cancelled all tenders for food suppliers and selected three interim suppliers who have been pre-qualified to supply food to other schools.