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New Copiparvovirus found in equine tetanus antitoxin

A study published in Emerging Infectious Diseases found that two horses developed equine serum hepatitis after receiving equine-derived tetanus antitoxin that was contaminated with a Copiparvovirus that is more closely related to the form that affects swine and cattle than to the virus that affects horses. Evidence of the new virus, which is being called equine parvovirus-hepatitis, was detected in the blood of 13 of 100 clinically normal adult horses, suggesting that the virus is endemic but not always evident.

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