A primary school in Diamond Hill on Monday said it was stepping up anti-mosquito efforts after the first ever local case of chikungunya fever was reported at nearby Fung Tak Estate the day before.

To ensure student safety, vice principal To Kwok-yiu of St Bonaventure Catholic Primary School said environmental hygiene officers would be on campus to oversee fogging operations, in which specialised equipment is deployed to spray a fine mist of insecticide to kill any mosquitoes in the area.

"We have sent out a notice to remind parents that they must take the temperature of their children [before they go to school]," he told reporters.

"We have also reduced the amount of outdoor activities. We're suspending physical education classes or some extra-curricular activities outdoors."

To added the school is also asking pupils to stay indoors during breaks and at lunch time.

A mother said she was a bit startled by the first local infection, but she's now prepared mosquito repellents for her child.

A primary five pupil, meanwhile, said she's a bit worried that she could unknowingly get bitten by mosquitoes.

"Sometimes, there would be stagnant water in the gardens nearby. Our school also has a turtle pond. When the turtles get a bath, some water might be left behind and it might breed some mosquitoes," she said.

The Food and Environmental Hygiene Department, meanwhile, said it's sent contractors to see if there are mosquitoes at school campuses in the area, as they step up pest control and promotional work.