Children at Firtrees Nursery in Motherwell are being offered screening for tuberculosis after a member of staff tested positive for the disease.
Parents were notified of the situation this week.
NHS Lanarkshire said the patient is well and has been responding to treatment.
A spokesman explained that, in line with national guidance, it has contacted all parents of children at the nursery, as well as all staff, to give them advice and support.
As a precaution some staff and children who might have come into contact with the staff member are being offered screening, again in line with national guidance.
Dr Josephine Pravinkumar, NHS Lanarkshire consultant in public health medicine said: “TB is a relatively uncommon infection in Scotland and is not easily transmitted from person to person. It can be treated with antibiotics.
“The risk of transmission of this infection to people who have been in contact with a case is low and the risk of people developing active TB disease is even lower.”
A helpline has also been set up for parents and staff should they have further questions. The number is 0800 0 282 836.
Last month NHS Lanarksire offered screening to patients and staff at Wishaw General Hospital after it emerged that a patient who was treated there beween December and March had TB.