The president of the Association of Public Analysts, which represents the scientists carrying out tests on suspect meat, said funding cuts meant there are not enough experts to do the job.
"We don't really have enough people to do the job. Unfortunately the public analysts service has deteriorated over the last few years due to closing laboratories and reduced numbers of public analysts," Liz Moran told BBC Radio 4's Today programme.
"I don't think there are sufficient resources," she added.
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It comes after security was stepped up around the country following the Manchester Arena attack which killed 22 people.
A murderer nicknamed 'Houdini' after escaping the death penalty seven times has been given the lethal injection.
The distress signal sparked a police hunt in the area to find the person or group who made it.