Funerals of cholera victims had also seen the infection spread out of the cities.
"Traditionally in Zimbabwe whenever someone dies they usually bring the body to the village of origin for funeral and burial and many times, unfortunately, bodies are not disinfected," he told the BBC News website.
"Everybody touches the body and everybody cries on the body and they get infected as well."
He added that the lack of awareness and the difficulty of getting to clinics meant that those dying of such an easily treatable disease was growing.
"Many times they don't have the transport means to the clinics because transport is one of the biggest challenges in the country.
"They don't have vehicles as well as they did some years ago and on top of that it has become very very expensive for people."
In many urban areas, like Harare, cases are actually decreasing, he said.
President Robert Mugabe has faced increasing criticism over his country's dire economic and humanitarian plight.
The cholera outbreak has been fuelled by the collapse of Zimbabwe's health, water and sanitation systems.
Opposition leader Morgan Tsvangirai visiting a cholera treatment centre in Harare
Zimbabwean journalist Brian Hungwe says that many nurses and doctors are refusing to work, unless they get paid in hard currency.
The Zimbabwe dollar is virtually worthless, because of hyperinflation. Last week, a new Z$100 trillion note was launched - worth about US$30 (£20).
Mr Mugabe's allies have accused Western countries of trying to use the cholera outbreak as an excuse to topple him.
Cholera cases have been reported in all 10 of Zimbabwe's provinces and nearly 50,000 people have been infected with the preventable disease, the WHO says.
A week ago, it said 2,200 people had died from cholera in Zimbabwe since August 2008.
The disease has also spread to neighbouring South Africa.
The latest WHO figures were released as campaign group Human Rights Watch called on African leaders to put pressure on Mr Mugabe to end Zimbabwe's suffering during an African Union summit in Ethiopia next week.
Cholera: 2,755 died since August
Anthrax: Eight deaths since November
HIV/Aids: Estimated 400 deaths a day
Maternal mortality: Risen from 168 per 100,000 in 1990 to 1,100 in 2005
The organisation accuses Zimbabwe's government of leaving five million people dependent on food aid and most of the population without access to health care.
South Africa says it will host a regional summit next week - the latest attempt to broker a power-sharing agreement between Mr Mugabe and opposition leader Morgan Tsvangirai.
The pair met on Monday but failed to make any progress on implementing a deal they agreed in September. They remain divided on the key question of who should control key ministries.
The opposition leader won the first round of last year's presidential election but withdrew from a run-off in June citing state-sponsored violence.
Mr Mugabe's supporters blame Zimbabwe's problems on Western sanctions.
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