Photo taken on Oct. 15, 2015 shows artemether injectable medicine for treating malaria disease stored at a health facility in Kawangware slums, Nairobi, capital of Kenya. (Xinhua/John Okoyo)

JUBA, Nov. 7 (Xinhua) -- The World Health Organization (WHO) has decried a surge in malaria cases in South Sudan recorded this year.

The WHO said in a report published on Sunday that nearly 1.9 million malaria cases have been reported across South Sudan as of Oct. 23, up from 1.82 million cases in the same period of 2015.

Dr. Jia Yu (L), chief of Chinese medical mission in Togo examines a child hospitalized withmalaria in the Regional Central Hospital of Lome Commune, China-aided hospital, in Lome, capital of Togo, Oct. 14, 2015. (Xinhua/Zhang Gaiping)

"All counties reported an upsurge in malaria across the country in 2016, with Northern Bahr El Ghazal and Upper Nile reporting more than twice the number of cases when compared to 2015," the report said.

The WHO said malaria incidence at sites housing internally displaced people in some counties is now within expected levels following a series of interventions by health organizations, including improving medical access through mobile clinics, distribution of insecticide-treated mosquito nets, indoor residual spraying and larviciding.

The WHO said the number of malaria cases was expected to decline with the onset of the dry season in the coming weeks.