A Veterans Affairs patient who was among thousands treated with unsterilized equipment has tested positive for HIV, the first such case reported since the department warned veterans they could have been exposed to infectious diseases.

The VA previously reported that hepatitis had been found in 16 patients, but the agency cautioned there was no way to prove that the patients contracted the illnesses because of treatment at their facilities. In an e-mail late Friday, the agency said it was investigating "the possibility of such a relationship."

The VA earlier this year warned more than 10,000 veterans to get blood tests because they could have been exposed to contamination while getting colonoscopies in Murfreesboro, Tenn., and Miami.

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