The number of cases has reached 1694 since the start of the epidemic just over a week ago, up from 888 on Friday and 1128 on Saturday.
The jump in the number of cases on Sunday represents the biggest 24-hour surge since the outbreak began.
That number includes around 80 people who had been infected but are now fully recovered.
On Saturday, head of Italy’s civil protection department, Angelo Borrelli, said only around half of the number of confirmed infections were clinical.
The non-clinical cases have few or no symptoms, and are not in hospital but in isolation at home.
Official figures said 105 people were receiving intensive care hospital treatment as of Saturday.
Eighty of the most serious cases are in the northern Lombardy region, which is at the centre of the outbreak.
All the deaths have been recorded in the three northern regions of Lombardy, Veneto and Emilia-Romagna, according to the health ministry.
Most of the deceased were elderly, while some of them had pre-existing health conditions including cancer and were already in hospital when the virus was detected.
Italy has the highest number of confirmed cases in Europe and has also been a point of contagion with many cases in other EU countries involving people who had recently visited northern Italy where the outbreak started.
Italian authorities have urged calm whilst scrambling to halt the spread of the virus.
Prime Minister Giuseppe Conte urged people “not to give in to panic and follow the advice of health authorities”.
For the last week more than 50,000 people have been confined to 10 towns in Lombardy and one in Veneto in a bid to stop the spread of the disease.
The government has ordered that schools and universities must remain closed there for a second week, with large public gatherings still banned in an effort to halt the contagion.
Italian ministers have stressed that Italy remains safe to visit, as most of the country remains unaffected by the virus.
