Namibia is the latest country to suspend meat imports from South Africa over listeria, news agency Reuters reports quoting the agriculture department.
The government identified the cold meat polony as the source of the listeria poisoning -which has killed 180 people since January 2017.
Supermarkets in South Africa have been clearing the popular sausage from the shelves.
Mozambique, Zambia and Botswana have also banned the sausage.
The listeria outbreak was finally traced after infecting people for more than a year.
In some people the disease – known as listeriosis – causes high temperatures, vomiting and diarrhoea. The elderly, people with compromised immune systems, and babies – both in the womb and newborn – are particularly vulnerable.
It is believed to have originated in an Enterprise Food factory in the northern city of Polokwane.