Tropical Animal Health and Production

, Volume 41, Issue 5, pp 723–729

Effectiveness of Rose Bengal test and fluorescence polarization assay in the diagnosis of Brucella spp. infections in free range cattle reared in endemic areas in Zambia

  • J. B. Muma
  • A. Lund
  • K. Nielsen
  • G. Matope
  • M. Munyeme
  • K. Mwacalimba
  • E. Skjerve
Original Paper

DOI: 10.1007/s11250-008-9244-0

Cite this article as:
Muma, J.B., Lund, A., Nielsen, K. et al. Trop Anim Health Prod (2009) 41: 723. doi:10.1007/s11250-008-9244-0

Abstract

The effectiveness of Rose Bengal test (RBT) and fluorescence polarization assay (FPA) in diagnosing cattle brucellosis in endemic areas was assessed and RBT and FPA test agreement was compared (n = 319). The sensitivity of RBT and FPA in detecting low Brucella titres were evaluated in paired sera (n = 34). A logistic regression model was constructed to predict cattle test result in FPA using RBT as the main predictor and incorporating bio-data and animal history. There was 79.3% agreement between the RBT and FPA (Kappa = 0.59; Std error = 0.05; p = 0.000) and a high correspondence between high RBT scores and positive FPA results suggesting that sera with high RBT score may not require confirmation with tests such as competitive-ELISA or CFT. High FPA cut-off points were more likely to miss animals with low antibody titres. The RBT had a reduced ability in detecting low antibody titres compared to the FPA. FPA test interpretation was improved if a priori information, such as sex and age was used. Under the challenging disease surveillance conditions prevailing in rural Africa, field-testing methods that are sensitive and specific; allow single animal contact, low technical skills in data interpretation are suitable.

Keywords

CattleBrucellosisEndemic areaFPARBTZambia

Abbreviations

CFT

Complement fixation test

ELISA

Enzyme linked immunossorbent assay

FPA

Fluorescence polarization assay

mP

Mili-polarisation units

RBT

Rose Bengal test

Se

Sensitivity

Sp

Specificity

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • J. B. Muma
    • 1
  • A. Lund
    • 2
  • K. Nielsen
    • 3
  • G. Matope
    • 4
  • M. Munyeme
    • 1
  • K. Mwacalimba
    • 1
  • E. Skjerve
    • 5
  1. 1.Department of Disease Control, School of Veterinary MedicineUniversity of ZambiaLusakaZambia
  2. 2.National Veterinary InstituteOsloNorway
  3. 3.Animal Disease Research, InstituteCanada Food Inspection AgencyNepeanCanada
  4. 4.Department of Paraclinical Veterinary Studies, Faculty of Veterinary MedicineUniversity of ZimbabweHarareZimbabwe
  5. 5.Department of Food Safety and Infection BiologyNorwegian School of Veterinary ScienceOsloNorway