[Experimental infection with Salmonella abortus ovis in rams].
The susceptibility of rams to experimental challenge with Salmonella abortus ovis was investigated by subcutaneous, conjunctival or preputial administration of 1 X 10(10) viable salmonella to 3 groups of 6 adult Préalpes rams. Slaughter and autopsy of 15 rams were made 83 days after challenge. Each of the 3 remaining rams was introduced in 3 groups of 6 salmonellosis-free ewes. The subcutaneous injection caused a significant hyperthermia, a rapid increase in antibody titers without detectable genital excretion of salmonella. The conjunctival or preputial challenge caused a significant serological response without fever; S. abortus ovis was isolated from samples taken 1 to 13 days after challenge only in rams challenged by the preputial route. No salmonella was isolated from organs of the 15 slaughtered rams. Ewes made pregnant by the 3 remaining rams showed no signs of infection. In our experimental conditions, a genital colonization was not observed; a passive genital carriage of S. abortus ovis was shown to be possible; its hypothetical epidemiological role was discussed.
D000034:Abortion, Veterinary / Q000209:etiology*; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis; D001431:Bacteriological Techniques; D005260:Female; D008297:Male; D011247:Pregnancy; D012475:Salmonella / Q000276:immunology / Q000302:isolation & purification; D012481:Salmonella Infections, Animal / Q000382:microbiology / Q000635:transmission*; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology / Q000635:transmission*; D013094:Spermatozoa / Q000382:microbiology; D013997:Time Factors
D000907:Antibodies, Bacterial
Infection expérimentale du bélier par Salmonella abortus ovis.