UNASSIGNED: @entity1271 is a common and costly production disease on dairy farms. In Canada, the @entity922 ( @entity922 ) has been determined for conventionally managed dairy farms; however, no studies to date have assessed rates in organically managed systems. The objectives of this observational study were (1) to determine the producer-reported @entity922 and predominant pathogen types on conventional and organic dairy farms in Southern Ontario, Canada, and (2) to evaluate the association of both mean overall @entity922 and pathogen-specific @entity922 with management system, housing type, and pasture access. Data from 59 dairy farms in Southern Ontario, Canada, distributed across conventional (n = 41) and organic management (n = 18) systems, were collected from April 2011 to May 2012. In addition to management system, farms were categorized by housing method (loose or tie-stall) and pasture access for lactating @entity291 . Participating producers identified and collected samples from 936 cases of clinical @entity1271 . The most frequently @entity1271 pathogens were coagulase-negative staphylococci, Bacillus spp., Streptococcus spp., @entity794 , and @entity526 . The @entity922 was higher on conventional farms than organic (23.7 vs. 13.2 cases per 100 @entity291 -years) and was not associated with housing type (loose or tie-stall), pasture access, or herd-average milk yield. Bulk tank somatic cell count tended to be lower on conventional farms than organic (222,000 vs. 272,000 cells/mL). Pathogen-specific @entity922 attributed to Staph. aureus, Bacillus spp., and @entity526 was greater on conventional than organic farms, but was not associated with housing or any other factors. In conclusion, organic management was associated with reduced overall and pathogen-specific @entity922 .

Incidence rate of pathogen-specific clinical XXXX on conventional and organic Canadian dairy farms.

@entity794 :: ('1280', 'Species') :: ['Staphylococcus aureus'] @entity1271 :: ('MESH:D008413', 'Disease') :: ['Mastitis', 'isolated mastitis', 'mastitis'] @entity922 :: ('MESH:D013568', 'Disease') :: ['IRCM', 'incidence rate of clinical mastitis'] @entity291 :: ('9913', 'Species') :: ['cows', 'cow'] @entity526 :: ('562', 'Species') :: ['Escherichia coli', 'E. coli']
@entity1271 :: (MESH:D008413,Disease) :: ['mastitis']
