Brucella Suis Infection in Pregnant Cattle

Norton, J. H.; Thomas, A.D.

doi:10.1111/j.1751-0813.1979.tb07016.x

Cited by 8 publications

(6 citation statements)

References 7 publications

(3 reference statements)

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“…112, 115, 116, and 118) produced dead calves at the expected time without signs of brucella infection in either the calf or in the mother. Such stillbirths have been ascribed to lack of exercise during pregnancy (Norton and Thomas 1979).…”

Section: Complicating Health Factorsmentioning

confidence: 99%

Vaccination of cattle against brucellosis using either a reduced dose of strain 19 or one or two doses of 45/20 vaccine

1983

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SUMMARY Three groups, each of 14 mature Jersey heifers, were vaccinated. They were mated about 2 months later and those that became pregnant were challenged at about 6.5 months of pregnancy by the conjunctival application of virulent Brucella abortus. Group 1 heifers received 2 doses of B. abortus 45/20 vaccine 2 months apart. Only 5 of the 14 heifers became pregnant, and of these 5 only one resisted challenge. Group 2 heifers received only one dose of 45/20 vaccine, 5 of the 10 challenged resisted infection. Group 3 heifers received 3 × 108 cfu of strain 19. Six of the 10 heifers challenged resisted infection. All of 5 non‐vaccinated control cattle became infected. It appeared advantageous to give only one dose of 45/20 rather than 2 as presently recommended. A single dose of 45/20 vaccine induced resistance to virulent B. abortus approximately equal to that given by the reduced dose of strain 19. One dose of 45/20 vaccine stimulated transient serological positivity in 2 of 28 heifers whereas the reduced dose of strain 19 gave rise to persistent titres in 2 of 14 vaccinated heifers.

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Section: Complicating Health Factorsmentioning

confidence: 99%

Vaccination of cattle against brucellosis using either a reduced dose of strain 19 or one or two doses of 45/20 vaccine

1983

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“…B. abortus causes nearly all of the cattle abortions that result from brucellosis. B. melitensis (27) and B. suis (5, 26) infect cattle and spread within herds but rarely cause abortion (2,22,27). Recent evidence indicates that transmission of B. suis bv.…”

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confidence: 99%

Differentiation of Brucella abortus bv. 1, 2, and 4, Brucella melitensis, Brucella ovis, and Brucella suis bv. 1 by PCR

1994

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Several PCR assays which identify the genus BruceUla but do not discriminate among species have been reported. We describe a PCR assay that comprises five oligonucleotide primers which can identify selected biovars of four species of Brucella. Individual biovars within a species are not differentiated. The assay can identify three biovars (1, 2, and 4) of B. abortus, all three biovars of B. melitensis, biovar 1 of B. suis, and all B. ovis biovars. These biovars include all of the Bruceila species typically isolated from cattle in the United States, a goal of the present research. The assay exploits the polymorphism arising from species-specific localization of the genetic element IS711 in the Brucella chromosome. Identity is determined by the size(s) of the product(s) amplified from primers hybridizing at various distances from the element. The performance of the assay with U.S. field isolates was highly effective. When 107 field isolates were screened by the described method, there was 100% agreement with the identifications made by conventional methods. Six closely related bacteria (Agrobacterium radiobacter, Agrobacterium rhizogenes, Ochrobactrum anthropi, Rhizobium leguminosarum, Rhizobium meliloti, and Rhzodospirillum rubrum) and two control bacteria (Bordeteila bronchiseptica and Escherichia coli) tested negative by the assay.

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“…There is no evidence that B. suis causes abortion or other clinical abnormalities in infected cattle, nor is there any evidence of horizontal transmission. In fact, an attempt to induce infection in cattle using a field strain of B. suis isolated from feral swine, was unsuccessful (Norton and Thomas 1979).…”

Section: Discussionmentioning

confidence: 99%

The identity, distribution and epizootiological significance of brucella isolates in Australia, 1981 to 1985

Crichton

Medveczky

1987

Aust Veterinary J

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Results listing the identification of brucella isolates received by the National Brucellosis Reference Centre, National Biological Standards Laboratory, Canberra from 1981 to 1985 are presented. The distribution of brucella species and biotypes is shown on a host and state basis. Cultures isolated in Australia were identified as Brucella abortus biotypes 1, 2 and 4, and Strain 19; B. suis biotype 1, and B. ovis. B. melitensis biotype 3 was recovered from man infected in the Mediterranean area. B. abortus biotype 1 was the most frequent isolate. Atypical cultures isolated from cattle included B. suis biotype 1, and erythritol-utilising mutants of Strain 19. The epizootiological implications of these findings are discussed in relation to their impact on the national campaign to eradicate bovine brucellosis.

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Brucella Suis Infection in Pregnant Cattle

Cited by 8 publications

References 7 publications

Vaccination of cattle against brucellosis using either a reduced dose of strain 19 or one or two doses of 45/20 vaccine

Vaccination of cattle against brucellosis using either a reduced dose of strain 19 or one or two doses of 45/20 vaccine

Differentiation of Brucella abortus bv. 1, 2, and 4, Brucella melitensis, Brucella ovis, and Brucella suis bv. 1 by PCR

The identity, distribution and epizootiological significance of brucella isolates in Australia, 1981 to 1985

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