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Short time effect of zinc bacitracin and heavy fouling with faeces plus urine on boar taint

Published online by Cambridge University Press:  02 September 2010

L. L. Hansen ,
A. E. Larsen ,
B. B. Jensen  and
J. Hansen-Møller
L. L. Hansen
Affiliation:
Danish Institute of Animal Science, Research Centre Foulum, PO Box 39, DK-8830 Tjele, Denmark
A. E. Larsen
Affiliation:
Danish Institute of Animal Science, Research Centre Foulum, PO Box 39, DK-8830 Tjele, Denmark
B. B. Jensen
Affiliation:
Danish Institute of Animal Science, Research Centre Foulum, PO Box 39, DK-8830 Tjele, Denmark
J. Hansen-Møller
Affiliation:
Danish Meat Research Institute, Maglegårdsvej 2, DK-4000 Roskilde, Denmark
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Abstract

The aim of this work was to evaluate the effect of a short-term addition of an antibiotic food additive (50 mg zinc bacitracin per kg food) on skatole concentration in faeces, blood (vena jugularis) and backfat of boars kept under two housing conditions at summer temperatures. They were kept clean or were heavily fouled with faeces plus urine. The experimental material consisted of six litters in each of four replicates, in total 24 litters, each litter of four boars. Fourteen days before slaughter the boars were distributed to the four treatments in four equally large pens according to litter and start weight. Two pens had a wholly slatted floor and two pens had a concrete floor, and each pen held six boars allowing 0·6 m2 per boar. All boars were kept at high pig house temperatures (22°C). In the two wholly slatted-floor pens the boars were kept very clean and in the two concrete floor pens boars were kept heavily fouled with faeces and urine during the final 14 days before slaughter. Boars in half the pens of both floor types were given an antibiotic food additive (50 mg zinc bacitracin per kg food) in the last week before slaughter.

Administration of the food additive zinc bacitracin significantly decreased the skatole level in blood and backfat in both clean and dirty boars when used for 3 and 7 days before slaughter. The experiment further confirmed that boars at high stocking rate and lying in copious amounts of warm faeces and urine at temperatures of 25°C or more, for at least a week, had higher indole and skatole levels in blood and subcutaneous fat than pigs which were kept clean. The androstenone concentration in backfat was not significantly influenced by either of the two treatments. A highly significant correlation between skatole in blood (vena jugularis) and in backfat was found at the day of slaughter (r = 0·98).

Keywords

androstenoneantibiotic food additiveboar taintfaecesindoleskatole

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Type
Research Article
Information
Animal Science , Volume 64 , Issue 2 , April 1997 , pp. 351 - 363
Copyright
Copyright © British Society of Animal Science 1997

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