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Articles by K.M. Young
Total Records ( 2 ) for K.M. Young
  J.B. Wells , C.D. Coufal , H.M. Parker , A.S. Kiess , K.M. Young and C.D. McDaniel
  Research has shown that exterior eggshell Aerobic Plate Counts (APC) are greatly decreased using a combination of Ultraviolet Light (UV) and hydrogen peroxide (H2O2). However, it is unknown how this treatment process would impact hatchability. Therefore, the objective of this experiment was to determine if spraying eggs with 1.5% H2O2 followed by UV irradiation for 8 min to reduce eggshell APC would affect hatchability. Eggs from 3 commercial houses (57 wk-old broiler breeders) were collected over 2 d (n = 1,944 eggs). Half were treated with 1.5% H2O2 and UV and the other half served as untreated controls (18 eggs/ tray). At time of treatment, 1 egg was randomly selected from each of 108 trays (n = 54 per treatment) for eggshell APC enumeration on TSA. Remaining eggs were stored at 18.3oC. Prior to set, 1 egg per tray from d 1 of collection was sampled for APC enumeration. The 16 remaining eggs/tray were weighed prior to incubation and at 18 d to determine egg weight loss. At hatch (21.5 d), chick weights were obtained, meconium samples were collected from 18 chicks per incubator and samples were plated on TSA to determine the presence of intestinal microorganisms. A 3 log10CFU/egg reduction in eggshell APC was found for treated eggs when compared to control eggs. At hatch, no differences in chick weight, egg weight loss, positive meconium samples, or hatchability were observed between treatments. In conclusion, UV irradiation for 8 min with 1.5% H2O2 reduced eggshell APC on broiler breeder eggs with no affect on hatchability.
  J.B. Wells , C.D. Coufal , H.M. Parker , A.S. Kiess , J.L. Purswell , K.M. Young and C.D. McDaniel
  Previous research has indicated that a single exposure of eggs to Ultraviolet Light (UV) in combination with 3% hydrogen peroxide (H2O2) results in a greater reduction of eggshell microorganisms compared to eggs treated with either UV or H2O2 alone. The objective of this study was to determine if hatchability would be affected if eggs were treated by repeated applications of UV and H2O2. In the first experiment, eggs receiving H2O2 and UV light for 2 min 6 times yielded the greatest reduction in aerobic plate counts (5.3 log10CFU/egg) when compared to other treatment groups that utilized various repetitions of H2O2 and UV light. The second experiment determined the effect on hatchability when using this combination tested in Experiment 1. In Experiment 2, a 4 log10CFU/egg reduction in eggshell aerobic plate counts was observed for eggs treated with UV and H2O2 when compared to untreated control eggs. There were no differences in hatchability, hatch residue, chick weight, residual yolk weight, or egg weight loss between control and treated groups. In conclusion, multiple applications of UV and H2O2 effectively reduced aerobic microorganisms on the eggshell to low levels with no detrimental effects on broiler breeder egg hatchability or chick quality parameters.
 
 
 
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