This study took place in seven farms in the Santa Catarina highlands, in which there were reproductive disorders. One hundred and one urine samples were collected from sows in production. One sample from the first urine in the morning was collected and indirect fluorescense was performed in the urinary sediment. The samples were examined and classified as negative (bacilli absent or rare with light fluorescense) and positive (bacilli with bright fluorescense). 16.8% samples were positive for A. suis, with a variation range from 14 to 80%, which cames from 4 farms. This results showed that in farms with reproductive disorders, A. suis can be involved in the etiology of the problem.
swine; urinary infection; Actinomyces suis; Santa Catarina - Brazil
