[Concordance of leishmaniasis cutaneous tests in Tunisia]

Arch Inst Pasteur Tunis. 2001;78(1-4):11-6.
[Article in French]

Abstract

A cross sectional study aimed to evaluate the effect of antigenic preparation (Leishmania infantum versus Leishmania major) and dose of leishmania antigens (5 x 10(6) versus 2.5 x 10(6) parasites in the same volume) on the reproducibility of delayed type hypersensitivity leishmania skin test. Results showed that among 34 individuals involved from visceral leishmaniasis endemic area. 26 (76.5%) had a positif Leishmania infantum leishmania (L-L. infantum) test and 27 (79.4%) to Leishmania major leishmania (L-L. major). Mean size of cutaneous reaction was 5.94 +/- 2.86 mm for L-L. infantum and 5.41 +/- 3.23 mm for L-L. major, with a significant positive linear association (p < 10-3). Intra-class correlation coefficient was 0.80 (CI95% = [0.64-0.93]) and concordance Kappa (kappa) was 0.57 (CI95% = [0.40-0.74]). Among 153 individuals from zoonotic cutaneous leishmaniasis. 92.9% revealed a positive test for both types of leishmanin (L-L. major full dose versus L-L. major half dose). Mean size of cutaneous reaction was 12.61 +/- 4.65 mm for the reference test and 11.30 +/- 3.95 mm for diluted one, with a positive linear association (p < 10-3). Intra-class correlation coefficient was 0.78 (IC95% = [0.71-0.84]) and concordance Kappa (kappa) was 0.82 (IC95% = [0.73-0.91]). These results demonstrate a limited effect of leishmania antigenic variation and antigen dose on the reproducibility of delayed type hypersensitivity induced by the leishmanin test.

Publication types

  • Validation Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Animals
  • Antigenic Variation / genetics
  • Antigens, Protozoan* / genetics
  • Child
  • Child, Preschool
  • Cross-Sectional Studies
  • Endemic Diseases / statistics & numerical data
  • Female
  • Humans
  • Hypersensitivity, Delayed / etiology
  • Leishmania infantum / immunology*
  • Leishmania major / immunology*
  • Leishmaniasis, Cutaneous / diagnosis*
  • Leishmaniasis, Cutaneous / epidemiology
  • Leishmaniasis, Cutaneous / parasitology
  • Leishmaniasis, Visceral / diagnosis*
  • Leishmaniasis, Visceral / epidemiology
  • Leishmaniasis, Visceral / parasitology
  • Linear Models
  • Male
  • Middle Aged
  • Sensitivity and Specificity
  • Skin Tests / methods*
  • Skin Tests / standards
  • Statistics, Nonparametric
  • Tunisia / epidemiology
  • Zoonoses / epidemiology
  • Zoonoses / parasitology

Substances

  • Antigens, Protozoan