title: Evaluation of an experimental chlorate product as a preslaughter feed supplement to reduce salmonella in meat-producing birds.
abstract: A study was conducted to evaluate the effect of experimental chlorate product (ECP) feed supplementation on Salmonella Typhimurium (ST) in the crop and ceca of market-age broilers. In trial 1, 160 market-age broilers were randomly assigned to 8 treatment groups and replicated twice, with 20 broilers per pen for 1 wk. Trial 2 used the same design, but used 80 market-age broilers with 10 broilers per pen. Treatments were as follows: 1) control feed + double-distilled drinking water (dd H(2)O); 2) control + 18.5% experimental zeolite carrier with dd H(2)O; 3 to 7) control feed supplemented with 0.5, 1.0, 5.0, 10.0, or 18.5% of a feed grade ECP + dd H(2)O; 8) control feed + 1x ECP (0.16% w/v; containing 15 mM chlorate ion equivalent) added to dd H(2)O. Seven-week-old broilers were provided experimental treatments for 7 d, killed, and then ceca and crops were removed and evaluated for ST. Broilers fed 5 to 18.5% ECP or water ECP had a significantly lower (P < 0.05) incidence of ST in the crop (36 to 38% and 14%, respectively) when compared with the control (60%). Broilers fed 10% ECP or water ECP had significantly lower ST crop concentrations (1.03 log(10) and 0.38 log(10) ST/g, respectively) when compared with broilers fed a control diet (1.54 log(10) ST/g). Crop and ceca ST incidence (32 to 48%) and concentration (1.00 to 1.82 log(10) ST/g) were significantly lower in broilers fed 5 to 18.5% ECP as compared with the control (78%; 2.84 log(10) ST/g). Broilers fed 5% or greater ECP had significantly higher water consumption (380 to 580 mL water/d) and litter moisture (31 to 56%) when compared with the control (370 mL water/d; 23% moisture). Only broilers fed 18.5% ECP had significantly lower 7-wk BW (2.77 kg of BW) when compared with the controls (3.09 kg of BW). Average daily gains were significantly depressed in broilers fed 10 or 18.5% ECP compared with the controls. These results indicate broilers supplemented with feed </= 5% ECP or water ECP 7 d before slaughter reduced ST without affecting growth parameters.
authors.affiliation: United States Department of Agriculture-Agricultural Research Service, Southern Plains Agricultural Research Center, Food and Feed Safety Research Unit, College Station, TX 77845, USA. Allen.Byrd@ars.usda.gov
authors.forename: J A
authors.initials: JA
authors.lastname: Byrd
authors.forename: M R
authors.initials: MR
authors.lastname: Burnham
authors.forename: J L
authors.initials: JL
authors.lastname: McReynolds
authors.forename: R C
authors.initials: RC
authors.lastname: Anderson
authors.forename: K J
authors.initials: KJ
authors.lastname: Genovese
authors.forename: T R
authors.initials: TR
authors.lastname: Callaway
authors.forename: L F
authors.initials: LF
authors.lastname: Kubena
authors.forename: D J
authors.initials: DJ
authors.lastname: Nisbet