Line differences in resistance to Salmonella enteritidis PT4 infection.
1. Four groups of hens, each of a different line, were inoculated at peak of lay, per os in the crop with 1 ml of a suspension containing 10(9) cfu/ml Salmonella enteritidis PT4 (SE). The kinetics of SE contamination in the environment, egg shell and yolk were studied during the first 28 d post inoculation. On the day of slaughter, intestines, caeca, spleen, liver, ovary, oviduct and content were investigated for SE contamination. 2. The commercial egg-type line L2 was found to be the most susceptible to SE. It laid many SE-positive yolks (13.8%) and internal and faecal organs were frequently infected. 3. Certain lines are found to exhibit a degree of resistance to SE; the cause of which is unknown and might be attributed to major genes.
Protais
J
J
CNEVA, Laboratoire Central de Recherches Avicole et Porcine, Ploufragan, France.
Colin
P
P
Beaumont
C
C
Guillot
J F
JF
Lantier
F
F
Pardon
P
P
Bennejean
G
G
D000003:Abattoirs; D000818:Animals; D002645:Chickens; D004198:Disease Susceptibility; D004528:Egg Shell / Q000382:microbiology; D004530:Egg Yolk / Q000382:microbiology; D005260:Female; D006801:Humans; D007113:Immunity, Innate; D007422:Intestines / Q000382:microbiology; D007700:Kinetics; D008099:Liver / Q000382:microbiology; D010053:Ovary / Q000382:microbiology; D010057:Oviducts / Q000382:microbiology; D012480:Salmonella Infections / Q000517:prevention & control; D012481:Salmonella Infections, Animal / Q000276:immunology*; D012477:Salmonella enteritidis / Q000302:isolation & purification; D013154:Spleen / Q000382:microbiology