Mineral status, bone characterisitics, carcass characteristics, and performance of feedlot lambs implanted with zeranol

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references: p.45-53.Issued also on microfiche from Lange Micrographics.Fifty-four Rambouillet (avg wt, 34.6 kg) wether lambs were used to determine the effects of zeranol of p and N excretion, animal performance, carcass characteristics, and bone characteristics. Lambs were blocked by sire, randomly allotted to pens of 3 to 4 in an open sided barn and assigned to either an implant (1) or non-implant (NI) treatment group . Lambs had ad libitum access to a high concentrate diet containing 38% TDN and 16% CP or 67 d. Lambs were fed for 21 d prior lo implanting. At 14 d intervals post implanting, pens were thoroughly cleaned and excreta allowed to accumulate for 2 d. Excreta was collected and analyzed for P and N content. Lambs were slaughtered on d 67 and carcass characteristics were determined. Phosphorus excretion expressed as a percentage of P intake for I vs NI treatment groups at 4, 28, 42, and 56 d post implanting was 55.7 vs 61.4% (P=.32) 45.4 vs 55.8% (P=.04)1 50.5 vs 53.5/'o (P = .67) and 78.9 vs 80.7% (P =-.85), respectively. This resulted in an increase (P . 1O) of zeranol oil N excretion in this study. Implanted lambs had a 26.3% greater (P =.0009) ADG and 16.8% improvement (P=.02) in feed efficiency compared with NI lambs. implanting treatment did not affect carcass characteristics" however, implanted lambs did have thicker hides (P < . 0 1) and larger livers (P < 10). Bone breaking load was increased (P <.05) in I lambs compared to NI lambs. However, there were no other differences in physical characteristics of the metacarpal bones. Results of this study indicate that zeranol improved P utilization, feed efficiency, and ADG in feedlot lambs. Zeranol treatment also altered metacarpal bone characteristics and increased hide thickness and liver weights

Description of Brenneria roseae sp. nov. and two subspecies, Brenneria roseae subspecies roseae ssp. nov and Brenneria roseae subspecies americana ssp. nov. isolated from symptomatic oak

Gram-negative, facultatively anaerobic bacteria were isolated from symptomatic oak tissue in the UK and USA. Partial gyrB sequencing placed ten strains in the genus Brenneria, with B. goodwinii as the closest phylogenetic relative. The strains were investigated further using a polyphasic approach including MLSA (based on partial gyrB, rpoB, infB and atpD gene sequences), 16S rRNA gene sequencing, DNA-DNA relatedness studies and both phenotypic and chemotaxonomic assays. The MLSA and 16S rRNA gene analyses separated the strains into two groups based on origin, suggesting that they belong to Brenneria as two novel species. However, the DNA-DNA relatedness values revealed a closer relationship between the groups and indicated that they should belong to the same species. As the two groups of strains from the UK and USA can be differentiated from each other phenotypically and by ERIC PCR fingerprints, it is proposed to classify them as novel subspecies of a novel Brenneria species. The name Brenneria roseae sp. nov. (FRB 222T=LMG 27714T=NCPPB 4581T) is proposed, with Brenneria roseae subsp. roseae ssp. nov. (FRB 222T=LMG 27714T=NCPPB 4581T) for the strains from the UK and Brenneria roseae subsp. americana ssp. nov. (FRB 223T=LMG 27715T=NCPPB 4582T) for the strains from the USA. © 2014