Spinal MRIs similar to these found infections that many patients hadn't realized they had. Stefano Raffini/iStockphoto.com hide caption

itoggle caption Stefano Raffini/iStockphoto.com

New England Compounding Center co-owner Barry Cadden went to Capitol Hill for a congressional hearing Wednesday on the fungal meningitis outbreak. Choosing to take the Fifth Amendment, Cadden did not testify. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

A Framingham police officer keeps watch as federal agents search the New England Compounding Center company in Framingham, Mass., on October 16. Dominick Reuter/Reuters /Landov hide caption

itoggle caption Dominick Reuter/Reuters /Landov

Matthew Spencer receives intravenous infusions of a potent antifungal drug at home twice a day for an indefinite period to treat a suspected case of fungal infection linked to a contaminated steroid drug that came from New England Compounding Center in Massachusetts. Richard Knox/NPR hide caption

itoggle caption Richard Knox/NPR

Federal agents investigate the offices of the New England Compounding Center in Framingham, Mass., on Tuesday. The company's steroid medication has been linked to a deadly meningitis outbreak. Barry Chin/AP hide caption

itoggle caption Barry Chin/AP