Home About Browse Search

Strömberg Jansson, Anna, 2010. Immunisering för att minska ornelukt. First cycle, G2E. Uppsala: SLU, Dept. of Biomedical Sciences and Veterinary Public Health (until 231231)



Hundreds of thousands of piglets are castrated without anesthesia in Sweden every year so that we may be guaranteed meat without boar odor. The smell appears while cooking meat of boar and is described as urine- and sweat-like. High levels of androstenone and skatole are considered the main factors behind boar odor. Skatole is a metabolite of the amino acid tryptophan, which is formed in the colon of all pigs. Androstenone is a steroid hormone that is released from the Leydig cells in the testes of boars. Both androstenone and testosterone are derivatives of cholesterol and are regulated by GnRH via LH and FSH. In order to reduce boar odor, immunization against GnRH has been studied and shown to effectively reduce both androstenone and testosterone levels. The different antigens studied were found to provide a varied but generally good immune response. Testicular weight decreased in the immunized boars, which in practice could possibly be used to distinguish the pigs from immunized, still intact boars on the slaughter line. Vaccination against GnRH could be an alternative to surgical castration in Sweden as there is, already, an approved substance in the EU.

Main title:Immunisering för att minska ornelukt
Authors:Strömberg Jansson, Anna
Supervisor:Babol, Jakub
Examiner:Jansson, Désirée S.
Series:Veterinärprogrammet, examensarbete för kandidatexamen / Sveriges lantbruksuniversitet, Institutionen för biomedicin och veterinär folkhälsovetenskap (t.o.m. 2015)
Volume/Sequential designation:2010:3
Year of Publication:2010
Level and depth descriptor:First cycle, G2E
Student's programme affiliation:VY002 Veterinary Medicine Programme 330 HEC
Supervising department:(VH) > Dept. of Biomedical Sciences and Veterinary Public Health (until 231231)
Keywords:ornelukt, androstenone, immunisering, gris
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:Animal physiology and biochemistry
Animal physiology - Reproduction
Deposited On:23 Jul 2010 08:07
Metadata Last Modified:08 Oct 2012 12:35

Repository Staff Only: item control page


Downloads per year (since September 2012)

View more statistics