The occurrence of streptothricosis and its association with Amblyomma variegatum ticks in St. Lucia.

Cattle, horses, sheep and goats in all areas of St. Lucia were examined to ascertain the prevalence and distribution of streptothricosis on the island and to investigate its association with the occurrence of Amblyomma variegatum ticks. Although the disease was found to occur throughout St. Lucia it was more prevalent and generally of a more severe form in areas where A. variegatum ticks are present. A tick control programme in the North of the island appeared to have resulted in a dramatic reduction in the prevalence of the disease.