The disease, which is passed through contaminated water, has surfaced in five states, including the capital, Khartoum.
The US Embassy said last month that fatalities had been confirmed, and Egypt has begun screening passengers from Sudan at Cairo's international airport.
Some 22,000 cases of acute watery diarrhea have led to at least 700 fatalities since May 20, said Hossam al-Amin al- Badawi, of the Central Committee of Sudanese Doctors, adding that it is most likely cholera, but the government refuses to test for it.
The fast-developing, highly contagious infection can spread in areas without clean drinking water or with poor sanitation. If left untreated, it can cause death from dehydration.
Also Read
Sudan's official news agency SUNA meanwhile announced the opening of the school year, saying that authorities had the outbreak of "acute watery diarrhea" under control.
Activists and the opposition say President Omar al- Bashir's government refuses to acknowledge the cholera outbreak because it would reveal failures in the country's crumbling health system, where corruption is rife.
Since the outbreak began a year ago, over 11,000 cases have been reported, including at least 190 deaths, according to the World Health Organization and South Sudan's government.
Disclaimer: No Business Standard Journalist was involved in creation of this content