Neurogenic inflammation in the upper digestive tract of the mule duck: effect of a chemical algogen and force-feeding.
1.The objectives were to quantify the presence of neurogenic inflammation in 4 regions of the upper digestive tract of anaesthetised ducks (post-pharynx, pseudo-crop, transition between the pseudo-crop and the proventriculus, and proventriculus) after application of HCl stimulation of up to 4 M in the pseudo-crop. 2.The second objective was to quantify the presence of neurogenic inflammation in the same digestive tract regions as mentioned above during 4 feeding periods of foie gras production (rearing, preparation to force-feeding, and second and last meals of the force-feeding period). 3. Extravasation increased above a HCl stimulation threshold of 2 M. Furthermore, more extravasation was observed in the proventriculus compared to the other regions (P < 0·001). 4.Highest extravasation responses were observed in the proventriculus and the pseudo-crop at the end of the preparation period, and in the proventriculus after the second forced meal, compared with the rearing period (P < 0·01), with a return to rearing level at the end of force-feeding. 5.Such a kinetic could be indicative of a relative mildness of the irritant components associated with this feeding practice.
INRA, UMR791 Modélisation Systémique Appliquée aux Ruminants (MoSAR), 16 rue Claude Bernard, 75005 Paris, France. serviere@agroparistech.fr
J
J
Servière
M
M
Carriere
C
C
Duvaux-Ponter
G
G
Guy
S
S
Roussel
D000827:Animal Welfare; D000818:Animals; D004372:Ducks / Q000276:immunology*; D004750:Enteral Nutrition / Q000009:adverse effects*; D006851:Hydrochloric Acid / Q000494:pharmacology*; D008297:Male; D020078:Neurogenic Inflammation / Q000662:veterinary*; D011531:Proventriculus / Q000276:immunology*; D011897:Random Allocation
D006851:Hydrochloric Acid