Four people employed at a food company have been treated for tuberculosis (TB).
All of the remaining staff at the 2 Sisters Food Group Ltd site in West Bromwich are also being checked for symptoms.
A representative from the Public Health England said it usually required prolonged and close contact with somebody who has TB to catch the disease.
The four people who are infected with the disease are employed at a site in Dial Lane in the West Midlands town.
Dr Naveed Syed, of Public Health England, said the risk of catching tuberculosis was slight and that it could be completely cured with antibiotics.
Michele Paduano, BBC Midlands Today's health correspondent, said TB figures ‘were on the increase’ and in 2003, there were 784 cases in the West Midlands, while conditional figures for 2012 showed there were some 1,090 cases of the disease.
Further research has shown the highest affected areas in the region are in central Birmingham, with Sandwell, Wolverhampton and Coventry also being classed as “problem areas”.
Mr. Paduano added, "Around 65% of cases are imported from abroad,"
"Black Africans are the most at risk, followed by people of Pakistani and Indian origin."
Our own National Health Service is being crippled by Third World diseases, brought back into the country by immigrants, yet we continue to send billions of pounds in Foreign Aid every year. Will this madness ever end?