Zambia banned imports of South African processed meat, dairy products, vegetables and fruit.
South Africa's Health Ministry said the source was found after pre-school children fell ill from eating polony products traced to processed meat producers.
Enterprise and Tiger suspended their ready-to-eat meat productions, after authorities ordered to recall its products from national and global shops, while supermarket chains asked their clients to return the products and their money will be reimbursed.
Thus far, a shocking 180 persons diagnosed with listeriosis have died.
In a statement, RCL said on Monday that it has recalled all polony products produced at its Wolwehoek facility and the production of Rainbow polony has been suspended.
The minister told South Africans not to consume any ready-to-eat processed meat due to the risk of cross-contamination.
"The food served to over nine million learners daily as part of the NSNP is safe and excludes these types of meat products", the statement said.
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Motsoaledi said the recent outbreak was traced to Enterprise's Polokwane facility.
Health Minister Aaron Motsoaledi announced earlier that an Enterprise factory in Limpopo had been found to be the source of the outbreak of the disease.
The company increased testing for Listeria and confirmed the presence of a strain of Listeria in some products on February 14.
Tiger Brands advised consumers to remove any Enterprise ready-to-eat products from their fridges and place them in a plastic bag away from other products.
He said they had contacted all customers to confirm that recalled products were removed from store shelves. "It is devastating for me to have our products linked to this outbreak".
Several retailers including Pick n Pay, Shoprite Checkers and Woolworths have publicly stated that they are removing Enterprise processed cold meat products and Rainbow Chicken polony from their shelves and have requested customers who have purchased any of these products from them, to return them to a local store for a refund.
"The big hit is going to come with inventory write-offs because they are recalling all these products". Environmental health officials were notified and obtained samples from two unrelated polony brands manufactured by Enterprise and Rainbow Chicken Ltd. (RCL) which were submitted for testing the same day.