The city Health Department said further tests completed last night also came back negative.
Environmental tests completed by Tuesday morning showed no signs of anthrax at the hospital mailroom.
Tests completed yesterday conclusively determined that the bacteria was not anthrax, health officials in Vermont said.
IQ tests carried out when they were 13 were compared with IQ tests completed when they were 38.
But DNA tests completed last year on traces of semen showed that neither man committed the rape.
In the morning, Gov. Eliot Spitzer said that air quality tests completed so far had found no evidence of asbestos, but that air monitoring remained a priority.
The DNA tests, completed last month, exonerated Edwin Diaz, 25, of Parsippany and Jason Yantin, 20, of Newark, who had been identified by the victims from photographs.
And tests completed by the exams watchdog, Ofqual, show that when examiners re‑mark they are more generous than they are first time around.
New DNA tests completed this month persuaded officials in Montgomery County, including the district attorney, the sheriff and the presiding judge, to join Mr. Criner's lawyer in asking that the inmate be freed.
"Given recent events, we have decided to be especially cautious going forward," the hotel said in a statement on Thursday, adding that new tests completed this week confirmed the hotel's tower is clear of the bacteria.
There are more Tests completed than ever, many of them well inside the distance, and all this with an over rate that appears to be in inverse proportion to the rate of scoring.
