| prevalence of mastitis pathogens in ragusa, sicily, from 2000 to 2006. | the objective of this study was to report the prevalence of intramammary infections (imi) in ragusa, sicily, from milk samples (n = 18,711) collected between october 2000 and june 2006 from 101 dairy herds. milk samples were collected at 9,747 cow sampling events from 5,285 individual cows. samples were individual quarter (92.8%) or composite samples (7.2%) from an individual cow. logistic regression was used to examine the prevalence of imi at the level of milk sample and at the level of cow, c ... | 2007 | 18024774 |