Manhattan residents Andrea and Seth Nagel became very alarmed when their four-year-old son Abraham turned very ill.

"He was vomiting, he wasn't gaining weight. We took him to the doctor about a dozen times within four months," says Andrea Nagel.

What the Nagels found was that Abraham was being poisoned by toxic levels of mold.

"We left our apartment after receiving very disturbing results showing very high toxic levels of mold throughout our apartment," says Andrea Nagel.

Mold expert Laurence Molloy, seen above, found the highest concentration in Abraham Nagel's bedroom.

"I detected a particular kind of mold called Stachybotrys that is specific for children. It attacks children's lungs," says Molloy.

Seth Nagel claims he and his wife also suffered from severe symptoms and says after receiving the mold test results the building's manager seemed supportive.

The manager said, according to Seth Nagel, "Go and do what's best for your family. Don't worry about it, go to a hotel. I'm sure my insurance company will pay for it."

But after months of living in a hotel and replacing a good portion of his family's belongings he believes are contaminated, Seth Nagel says he hasn't seen any compensation for his expenses, which he now estimates are close to $40,000.

"I don't sleep at night from frustration," says Seth Nagel.

According to attorneys for Urban Associates, the management for the building's owner, 433 West Associates, LLC, the building hired its own experts. They found that Abraham Nagel's room did not have dangerously high mold counts, and that the counts are within an "acceptable level."

NY1 asked for documentation supporting their claims but have yet to receive any.

Management admits to the station that the building has a mold and leak problem and they claim they're trying to address it with a clean-up plan that follows proper protocol. However, they say the plan cannot be implemented because the Nagels will not allow them access to his apartment.

In response, the Nagels say a series of professionals determined the proposed plan would do more harm than good.

"If the landlord or his workmen who are unskilled in mold abatement come in and do the wrong thing, it will contaminate the apartment even more," says Molloy.

For now, the Nagels struggle to collect from their renter's insurance and wonder when they will return home.

"I want us to be healthy and I want to have a home again," says Andrea Nagel.

In the meantime, 433 West Associates has taken the Nagels and two other tenants to court to gain access to their apartments to commence its clean-up.

NY1 will continue to follow this story.

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