Malaria has killed more than 1,800 people in Burundi this year, the United Nations humanitarian agency has said, a death toll rivalling an Ebolaoutbreak in the neighbouring Democratic Republic of Congo.

In its latest situation report, the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) said 5.7 million cases of malaria had been recorded in Burundi in 2019 - a figure roughly equal to half its entire population. 

Of those cases, a total of 1,801 died from the mosquito-born disease in Burundi between January 1 and July 21, OCHA said.

The tiny country of 11 million people in the African Great Lakes region has still not declared a national emergency, despite OCHA saying the outbreak crossed "epidemic proportions" in May.

"The national malaria outbreak response plan, which is currently being validated, has highlighted a lack of human, logistical and financial resources for effective response," OCHA said in its latest weekly bulletin on humanitarian emergencies.

"All stakeholders, including the national authorities and partners are called upon to provide the requisite resources to mount a robust response to this event before it escalates."

A lack of preventive measures such as mosquito nets, climatic changes and increased movements of people from mountain areas with low immunity to malaria were driving the crisis, OCHA said. 

An OCHA official told AFP news agency that "the decision to declare an epidemic is the sovereignty of the Burundian state".

 The country declared a malaria epidemic in March 2017, when it had recorded 1.8 million cases and 700 deaths, but was resisting doing the same now.

A senior government official, who declined to be named, said the government did not want to admit weakness with elections set for 2020.

"We are less than a year away from the presidential election. [President Pierre] Nkurunziza, who is facing many crises, does not want to recognize what could be considered a failure of his health policy," the official told AFP