You can contact OSHA, perhaps this is a violation of the general duty clause. You might also try the health department.You can sue, but, your employer is correct, you will need evidence that the bed bugs came from your job. Your testimony will not be enough. Have any employees expressed concerns about their health or safety due to the ongoing bedbug issue? Although it may seem unethical to turn away a patient, this does not make it illegal. In most cases, the best place to sue your landlord for a bed bug problem is your local small claims court. Before termination if the manager refuses to hire pest control and clean out the refuse seek counsel. The court can give you a fee waiver form to fill out. Hotels and motels owe a legal duty to guests to ensure their premises are safe and free from bed bugs.