title: Effect of plant extract supplementation on Escherichia coli O157:H7 and Salmonella carcass isolation in young Holstein bulls fed a high-concentrate diet.
abstract: Ninety Holstein bulls were used in a complete randomized design to study the effect of a blend of plant extract (PE) supplementation on jejunum, cecum, and rectum microbiota (Escherichia coli and lactic acid bacteria [LAB]) and hide and carcass contamination (identification of E. coli O157:H7 and Salmonella). Three treatments--control (CTR), monensin (MON), and PE--were tested. Bulls were offered straw and concentrate ad libitum during 108 d. In the cecum, the percentage of LAB counts below 5 log CFU/ml was greater (P < 0.01) in MON (68.1%) than in CTR (34.6%) and PE (28.0%) treatments. On hide, Salmonella was detected (P < 0.05) in CTR (13.3%) and MON (10.0%) treatments, in contrast to PE (0%) treatment. In bulls fed high-concentrate diets supplemented with PE, no increase of carcass E. coli O157:H7 and Salmonella identification was observed.
authors.affiliation: Grup de Recerca en Nutrició, Maneig, i Benestar Animal, Unitat de Remugants-IRTA (Institut de Recerca i Tecnologia Agroalimentàries), Caldes de Montbui 08140, Spain. maria.devant@irta.es
authors.forename: M
authors.initials: M
authors.lastname: Devant
authors.forename: C
authors.initials: C
authors.lastname: Adelantado
authors.forename: A
authors.initials: A
authors.lastname: Anglada
authors.forename: M A
authors.initials: MA
authors.lastname: Calvo
authors.forename: A
authors.initials: A
authors.lastname: Bach
mesh_terms: D000818:Animals; D002353:Carrier State / Q000662:veterinary*; D002417:Cattle / Q000382:microbiology*; D002418:Cattle Diseases / Q000453:epidemiology / Q000517:prevention & control; D002432:Cecum / Q000382:microbiology; D015169:Colony Count, Microbial; D004927:Escherichia coli Infections / Q000453:epidemiology / Q000517:prevention & control / Q000662:veterinary; D019453:Escherichia coli O157 / Q000254:growth & development / Q000302:isolation & purification*; D005506:Food Contamination / Q000517:prevention & control*; D005516:Food Microbiology; D007583:Jejunum / Q000382:microbiology; D008297:Male; D008985:Monensin / Q000494:pharmacology; D010936:Plant Extracts / Q000494:pharmacology*; D011897:Random Allocation; D012007:Rectum / Q000382:microbiology; D012475:Salmonella / Q000254:growth & development / Q000302:isolation & purification*; D012481:Salmonella Infections, Animal / Q000453:epidemiology / Q000517:prevention & control
chemical_list: D010936:Plant Extracts; D008985:Monensin