"We close shops, bars, pubs and restaurants".
The health minister in Turkey, meanwhile, said Wednesday that a male patient who had traveled overseas has been isolated after confirmation of infection.
"COVID-19 has inevitably impacted all businesses".
The number of confirmed U.S. cases reached 566, including 22 deaths, according to state public health authorities and a running national tally kept by the Johns Hopkins University. "At stake is the health of our loved ones, our parents, our children, our grandparents", Conte said in a tweet.
He also said hard-hit Iran was trying its best to control the outbreak but needed more supplies.
Authorities there said on Tuesday that the country's first virus patient is a French energy worker who met colleagues and travelled while he was infected.
The Lombardy region, which is home to Milan and Venice and also a major shoe manufacturing hub, has been hit the hardest - and fashion firms big and small are reeling.
The two leaders also discussed the latest developments in the investigation into the murder of Italian student Giulio Regeni in light of the current cooperation between investigators from both countries.
573 new confirmed cases of coronavirus infection reported on Chinese mainland
So far, the virus and the COVID-19 illness it causes have killed more than 40 people out of almost 600 confirmed cases in Iran . South Korea reported 594 news cases on Saturday, bringing the total of confirmed cases to 2,931.
Slovenia became the latest country to curb travel from Italy, saying it would close some border crossings and perform health checks at those remaining open. When I speak of Italy, I speak of our dear ones, of our grandparents and of our parents.
The health crisis is dealing a serious blow to the country's economy - the third-largest of the 19 countries using the euro - and threatened instability worldwide.
"I will sign a decree that can be summarised as follows: I stay at home", Conte said on television.
The total number of confirmed cases came to 1,126 yesterday. Anyone travelling will have to carry a document declaring their reasons, and schools and universities will remain closed.
More than 10,000 people in Italy have the coronavirus, making it the worst-affected country apart from China.
The World Health Organization has praised Italy's "aggressive" response to the crisis, since the first cases emerged near Milan nearly three weeks ago but the economic cost has been huge.
"We have to limit the spread of the virus and prevent our hospitals from being overwhelmed", he told a news conference.
Italy will shut all shops moreover pharmacies and meals retailers, prime minister Giuseppe Conte has said. But Prime Minister Giuseppe Conte has extended this nationwide. Borrelli said 724 people have recovered, 102 more than Sunday.