The ability of Salmonella enteritidis isolated from chicks imported from England to cause transovarian infection.
S. Enteritidis HY-1 isolated during quarantine from chicks imported from England was used. Laying hens at the age of 34 weeks were inoculated orally with 10(10) organisms (10 birds), intramuscularly with 10(9) (5 birds), and intravenously with 10(9) (5 birds). Egg production did not change in hens infected orally, although it was reduced in hens infected intramuscularly for 2-3 weeks post inoculation. For one month, internally infected eggs of which the shells were not contaminated were found: one out of 65 eggs in hens infected orally and three out of 36 eggs in hens infected intramuscularly. This experiment demonstrated the ability of S. Enteritidis isolated from chicks imported from England to cause transovarian infection.
Nakamura
M
M
National Veterinary Assay Laboratory, Tokyo, Japan.
Nagamine
N
N
Norimatsu
M
M
Suzuki
S
S
Ohishi
K
K
Kijima
M
M
Tamura
Y
Y
Sato
S
S
D000818:Animals; D002645:Chickens / Q000382:microbiology*; D004739:England; D005260:Female; D007564:Japan; D010063:Ovum / Q000382:microbiology; D011201:Poultry Diseases / Q000382:microbiology / Q000635:transmission*; D012481:Salmonella Infections, Animal / Q000382:microbiology / Q000635:transmission*; D012477:Salmonella enteritidis / Q000302:isolation & purification / Q000472:pathogenicity*