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Brucella suis infection in pregnant cattle

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Norton, J.H. and Thomas, A.D. (1979) Brucella suis infection in pregnant cattle. Australian Veterinary Journal, 55 (11). pp. 525-527.

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Article Link(s): http://dx.doi.org/10.1111/j.1751-0813.1979.tb07016...

Abstract

Six pregnant cows in 11 to 33 weeks of gestation were each inoculated into the right conjunctival sac with 0.2 ml of a smooth culture of Brucella suis type I containing 27 million viable organisms. The 6 cows produced 7 calves, of which one single calf and one twin calf were stillborn (cause not determined). Br. suis was not isolated from any cow or calf using either special media or guinea-pig inoculation. No abnormality was found in any cow or calf at autopsy. Microscopic examination of placentas and tissues from stillborn calves revealed no abnormality. Serologically, 2 weeks after inoculation all 6 cows had positive reactions to the rose bengal test (RBT) and serum agglutination (SAT) titres of 25 iu to 116iu. However, these reactions disappeared within 11 weeks. Only 2 cows had a complement fixation (CFT) titre which lasted a maximum of 5 weeks and reached a titre of 4/4. Following the anamnestic use of Br. abortus strain 45/20 vaccine on 3 of the cows, positive RBT reactions, SAT titres of 33, 29 and 58 iu, and CFT titres of 4/16, 1/8 and 3/8 (respectively) were recorded 6 weeks after vaccination.

Item Type:Article
Corporate Creators:Biosecurity Queensland
Additional Information:Reproduced with permission from the © Australian Veterinary Journal. Access to published version may be available via Publisher’s website.
Keywords:Parasites; vectors; pathogens and biogenic diseases of animal; non-communicable diseases and injuries of animals; bacterial diseases; experimental infection; abortion; Brucellosis; cattle diseases; Brucella suis.
Subjects:Veterinary medicine > Veterinary bacteriology
Veterinary medicine > Diseases of special classes of animals > Cattle
Deposited On:25 Mar 2004
Last Modified:03 Sep 2021 16:43

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