| One
form of tuberculosis could be contracted through contact with cattle
and dairy products. In 1934 the government introduced a subsidy
to test cattle for tuberculosis and develop “tuberculin free”
dairy herds. Since 1955 it has been illegal to sell raw milk from
cows that are not tuberculin tested. Today all dairy cattle in Scotland
are tuberculin free, and the requirement to pasteurize all milk
removes threat of milk-borne infection.
The
number of cases of tuberculosis has increased recently; the consequence
of increased world travel, antibiotic resistant bacteria, and conditions
that impair the immune system such as HIV/AIDS. |