Care homes "could go to the wall" due to rising costs from the coronavirus pandemic, bosses have said.
Thirty out of 102 care providers contacted by the BBC also said none of their staff had been tested, down from 75 who said so in April.
Care sector leaders said the government response was "patchy and inconsistent".
The Department of Health and Social Care said all care staff and residents can now be tested, regardless of symptoms.
BBC England spoke to 102 care homes and providers across the country, which between them care for more than 6,500 residents and have about 9,000 staff.
In April, 75 of those providers said none of their staff had been tested. By 19 May, that number had fallen to 30.
In total, one in five of the 9,000 staff have had to self-isolate because either they or members of their families have shown symptoms of the virus.
Mike Padgham, who runs four homes in North Yorkshire and is chairman of the Independent Care Group, said he was worried about the rising costs of the pandemic, from personal protective equipment (PPE) to extra staff to cover for those self-isolating as well as lost income from empty beds.
His own homes have lost an estimated £100,000, and it is difficult for care home providers to restrict the use of agency staff as they try to fill the gaps left by those who have to self-isolate.
He said rising costs of personal protective equipment and lost income from fewer new residents moving in were hitting both social care staff and the older people they care for.
He said: "Sadly I think some providers will go to the wall.
"That will mean a loss of jobs and it's a resident's home so where are they going to go?"
The government is spending £600m to tackle the infection in care homes but Mr Padgham said it had become tied up in bureaucracy, and will not get to care homes until June.
"The NHS and social care have been on the front line together from day one, but social care has only just been recognised," he said.
"Even though people have said things [in Parliament] and at the number 10 briefing about us having an arm put around us, a ring put around us, we don't feel protected."
Nadra Ahmed, chairwoman of the National Care Association, said the BBC's findings show the response is "patchy and inconsistent".
"The availability of tests is improving but two months in, where social care was largely ignored at the outset, we really should be much further ahead to ensure the residents and staff are protected," she said.
The BBC's research also shows that 71 of the 102 homes and providers have had some residents tested – an improvement on April when only 42 reported any residents had been tested.
Prof Martin Green, chief executive of Care England, said ongoing testing was crucial.
"Testing is not a one off, it needs to be a rolling programme and used in conjunction with tracking and tracing," he said, adding that care homes needed "immediate access" to testing to ensure the safety of residents and staff.
As of 8 May nearly Read More – Source
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