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. 2005 Jul;73(7):4441-4.
doi: 10.1128/IAI.73.7.4441-4444.2005.

The order of prime-boost vaccination of neonatal calves with Mycobacterium bovis BCG and a DNA vaccine encoding mycobacterial proteins Hsp65, Hsp70, and Apa is not critical for enhancing protection against bovine tuberculosis

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The order of prime-boost vaccination of neonatal calves with Mycobacterium bovis BCG and a DNA vaccine encoding mycobacterial proteins Hsp65, Hsp70, and Apa is not critical for enhancing protection against bovine tuberculosis

Margot A Skinner et al. Infect Immun. 2005 Jul.

Abstract

Priming neonatal calves at birth with a Mycobacterium bovis bacillus Calmette-Guérin (BCG) vaccine and boosting with a DNA vaccine consisting of plasmids encoding mycobacterial antigens Hsp65, Hsp70, and Apa or the reverse prime-boost sequence induced similar levels of protection against experimental challenge with Mycobacterium bovis. When M. bovis was isolated from a thoracic lymph node following challenge, the two groups of calves given the prime-boost regimen had significantly lower numbers of M. bovis isolates than those vaccinated with BCG alone. These observations suggest that the exact sequence of administration of a prime-boost vaccination regimen in a neonatal animal model is not critical to the development of immunity.

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Figures

FIG. 1.
FIG. 1.
IFN-γ (A) and IL-2 (B) released from bovine PPD-stimulated whole blood cultures from animals vaccinated with BCG at 24 to 48 h of age and DNA vaccine at 6 and 9 weeks of age (▴), BCG at 24 to 48 h of age (•), and DNA vaccine at 24 to 48 h of age and at 3 weeks of age and BCG at 6 weeks of age (▪) and from animals that were not vaccinated (○). IFN-γ levels are presented as mean concentrations (ng/ml) and IL-2 levels as mean stimulation indices (SI). The error bars represent standard errors of the means. Calves were challenged with M. bovis at 17 to 18 weeks of age.

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