A four-year-old Shenzhen girl who had traveled to Henan before coming to Hong Kong already feverish was yesterday confirmed to be suffering from the mosquito- borne Japanese encephalitis.
The Centre for Health Protection said it was the fifth case this year, and the second imported case.
She traveled to Henan from July 15 to 19 and came to Hong Kong on July 26, despite developing a fever and headache a day before.
She was admitted to Tseung Kwan O Hospital on July 26 and developed convulsions after admission.
Her condition was stable and she was discharged after 12 days on Wednesday last week.
Six cases of the disease were reported last year and three in 2012.
Japanese encephalitis is a viral disease transmitted by the bite of infected Culicine mosquito, which is nocturnal.
The mosquito mainly breeds in waterlogged fields, marshes, ditches and small stagnant collections of water around cultivated fields.
The mosquitos become infected by feeding on pigs and wild birds infected with the virus.
Most Japanese encephalitis infections are mild, without apparent symptoms other than fever and headache. More severe infections involve the quick onset of headache, high fever, stiff neck, impaired mental state, coma, tremors, occasional convulsions especially in infants, and paralysis.