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. 1978 Jun;7(6):550–557. doi: 10.1128/jcm.7.6.550-557.1978

Whole-blood lymphocyte stimulation assay for measurement of cell-mediated immune responses in bovine brucellosis.

J M Kaneene, R K Anderson, D W Johnson, C C Muscoplat, P Nicoletti, R D Angus, D E Pietz, D J Klausner
PMCID: PMC275065  PMID: 97304

Abstract

A study was conducted to develop an in vitro whole-blood lymphocyte stimulation assay for measurement of cell-mediated immune response in bovine brucellosis. A soluble antigen (BASA) prepared from killed cells of Brucella abortus 1119-3 was used. Cattle infected with B. abortus field strains, B. abortus 19 calfhood- and adult-vaccinated cattle, and nonexposed cattle were tested. Blood was diluted 10-fold in RPMI-1640 medium (without added serum) and cultured with BASA (at a concentration of 2.2 microgram per culture) at varying times of incubation. Results were assayed for [3H]thymidine incorporation into deoxyribonucleic acid. A 6-day period was found to be optimal for incubating blood cultures to achieve maximum specific lymphocyte stimulation. Serological tests and bacteriological isolation attempts were conducted simultaneously with lymphocyte stimulation tests, and there was a significant correlation between cell-mediated immune response and bacteriological findings. There was a significant correlation between cell-mediated immune response and the level of serum antibodies on a group basis, but there was little correlation between the two systems on individual infected animals. Among vaccinated animals there was little or no correlation between cell-mediated immune and humoral responses. The whole-blood assay was found to be simple, fast, sensitive, and reproducible.

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Selected References

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