Brazil ordered three more food processing plants to suspend production on Monday as federal police continued their investigation of companies bribing meat inspectors to ignore infractions.
Brazil earlier closed three of the 21 food processing plants under investigation.
The other 15 plants are not allowed to export, although they may still produce for the domestic market.
Canada has banned imports from two plants, but other countries have banned all imports from Brazil.
China, Egypt and Chile have, however, lifted bans they imposed a few days ago when news of the scandals first broke.