A Texas lab is under federal investigation after inspectors found it didn't do enough to prevent the suffering of primates who were infected with a deadly virus as part of a study.
The National Institute of Allergy and Infectious Diseases found a variety of procedural errors with a study at the Galveston National Laboratory.
Among the allegations by U.S. inspectors is that a dozen monkeys infected with the Marburg virus were left unattended for up to 18 hours.
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The audit contends that meant researchers missed the opportunity to collect valuable data and resulted in the animals suffering longer than necessary.
The Marburg virus has similarities to the Ebola virus and is among the most virulent pathogens known to infect people.
Lab officials say most of claims are unfounded.