title: Isolation and characterization of a protective bacterial culture isolated from honey active against American Foulbrood disease.
abstract: Bacterial strains isolated from US domestic honey were screened for antibacterial activity against Paenibacillus larvae ssp. larvae, the causative agent of American Foulbrood (AFB) in apiaries. A bacterial isolate (TH13) showing a high level of antimicrobial activity against P. larvae ssp. larvae ATCC 9545 was selected and identified as Paenibacillus polymyxa by 16S rRNA gene sequencing. The antimicrobial compound was purified by 80% saturated ammonium sulfate precipitation followed by CM-sepharose chromatography and reverse-phase HPLC. The molecular mass of the compound was determined to be 1168.78 Da by ESI-qTOF MS, matching that of polymyxin E1. The producer strain showed a broad range of antibacterial activity against gram-positive and -negative bacteria including P. larvae ssp. larvae ATCC 25747 and foodborne pathogens such as Bacillus cereus F4552 and Escherichia coli O157:H7 ATCC 43895. The selection of antibiotic-producing bacterial strains indigenous to honey as protective cultures against AFB may lessen the use of antibiotics in apiaries.
authors.affiliation: Department of Food Science and Technology, New York State Agricultural Experiment Station, Cornell University, Geneva, NY 14456, USA.
authors.forename: Hyungjae
authors.initials: H
authors.lastname: Lee
authors.forename: John J
authors.initials: JJ
authors.lastname: Churey
authors.forename: Randy W
authors.initials: RW
authors.lastname: Worobo
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000898:Antibiosis; D005591:Chemical Fractionation / Q000379:methods; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000145:classification* / Q000187:drug effects / Q000254:growth & development* / Q000302:isolation & purification; D006722:Honey / Q000382:microbiology*; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D014481:United States
chemical_list: D000900:Anti-Bacterial Agents; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S