In the mouse model, the mycotoxin ochratoxin A has a non-selective sup
pressive effect on various immune and defence reactions. Apart from we
ight depression, lymphopenia, neutrophilia and eosinophilia, antibody-
producing cells, antibody titres in blood serum and phagocytosis of Es
cherichia coli by blood phagocytes become suppressed. Moreover, immuni
zed animals show a lower survival rate after experimental infection wi
th Pasteurella multocida as well as an increase in oxygen radicals in
blood cells.