UNASSIGNED: An experiment was conducted to compare bacterial counts of environmental @entity1271 pathogens in composted recycled manure solids bedding with those in fresh recycled manure solids. Eighteen Holstein @entity291 were housed in 1 pen with 18 stalls. One row of 9 freestalls included mattresses and was bedded weekly with composted recycled manure solids. The second row of 9 freestalls included mattresses and was bedded weekly with fresh recycled manure solids. The back one-third of stalls toward the alleyway was covered in 25 to 50 mm of bedding. Samples were taken from the back one-third of 4 stalls for both treatments on d 0, 1, 2, and 6 of each week. After 3 wk, bedding treatments were switched between rows, making the total duration 6 wk. Mean total gram-negative bacterial counts were approximately 0.5 log10 cfu/g of dry matter lower in the composted recycled manure solids on d 0 compared with fresh recycled manure solids. @entity4005 species, coliform, and Streptococcus species counts were at least 1.0 log10 cfu/g of dry matter lower in composted compared with fresh recycled manure solids on d 0. Only gram-negative bacterial counts on d 1 were reduced in composted recycled manure solids compared with fresh recycled manure solids. Differences were not observed between treatments in gram-negative bacterial, coliform, @entity4005 species, or Streptococcus species counts on d 2 and 6. Ash content was higher in composted recycled manure solids compared with fresh recycled manure solids on d 0, 1, 2, and 6. Despite the increase in ash after composting, bacterial counts of @entity1271 pathogens in composted recycled manure solids were comparable with those in fresh recycled manure when used as freestall bedding.

Short communication: Environmental XXXX pathogen counts in freestalls bedded with composted and fresh recycled manure solids.

@entity4005 :: ('MESH:D007710', 'Disease') :: ['Klebsiella'] @entity291 :: ('9913', 'Species') :: ['cows'] @entity1271 :: ('MESH:D008413', 'Disease') :: ['mastitis']
@entity1271 :: (MESH:D008413,Disease) :: ['mastitis']
