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Revue scientifique et technique (International Office of Epizootics)2006; 24(3); 899-908;

[An epidemiological survey of equine anaplasmosis (Anaplasma phagocytophilum) in southern France].

Abstract: Anaplasmosis is caused by the bacterium Anaplasma phagocytophilum and transmitted by Ixodes spp. ticks. According to some reports the disease can be introduced into disease-free zones by migrating birds. The purpose of this study was to evaluate the seroprevalence of A. phagocytophilum in horses in the Camargue. Data concerning 424 horses were gathered and the sera were tested for A. phagocytophilum and for piroplasmoses using an enzyme-linked immunosorbent assay and a complement fixation test, respectively. The seroprevalence rates were 11.3 % for A. phagocytophilum, 64.4 % for Theileria equi and 19.7% for Babesia caballi. Stallions were less likely to produce antibodies against A. phagocytophilumthan were females or geldings (odds ratio [OR] = 0.3; p = 0.021). The presence of swallows increased the risk of infections in stables (OR = 5.18; p = 0.011). Spatial analysis showed the existence of groups of infected stables along canals and rivers (p = 0.008). These results suggest an emergence of A. phagocytophilum in the Camargue.
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Publication Date: 2006-04-29 PubMed ID: 16642760
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  • English Abstract
  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article discusses an epidemiological survey conducted on horses in the Camargue region of southern France, focusing on the prevalence of Anaplasma phagocytophilum, a bacterium causing equine anaplasmosis.

Study Objective and Methodology

  • The main objective of the study was to understand the prevalence or seroprevalence of Anaplasma phagocytophilum in horses in the Camargue region of southern France.
  • Data for the study was collected from 424 horses, and their serums were tested for A. phagocytophilum and piroplasmoses.
  • The testing was done using an enzyme-linked immunosorbent assay and a complement fixation test.

Findings of the Study

  • The study found that the seroprevalence rates were 11.3% for A. phagocytophilum, 64.4% for Theileria equi, and 19.7% for Babesia caballi.
  • It was noted that stallions were less likely to produce antibodies against A. phagocytophilum than females or geldings.
  • The presence of swallows was also found to increase the risk of infections in stables, suggesting that they might play a role in spreading the disease.
  • Groups of infected stables were found to be located along canals and rivers, indicating a spatial pattern to these infections.

Interpretation and Conclusion

  • The results of the study suggest an increased occurrence or emergence of A. phagocytophilum in the Camargue region.
  • The significant differences in infection rates between genders suggest a potential difference in immune response or exposure risk, calling for further investigation.
  • The spatial correlation of the disease, with infection clusters found along canals and rivers, suggests the potential role these geographical factors might play in the transmission of this disease.
  • The link established between the presence of swallows and the risk of infection moreover underscores the complexity of the disease ecosystem and potential vectors or intermediaries in the spread of the bacterium A. phagocytophilum.

Cite This Article

APA
Leblond A, Pradier S, Pitel PH, Fortier G, Boireau P, Chadoeuf J, Sabatier P. (2006). [An epidemiological survey of equine anaplasmosis (Anaplasma phagocytophilum) in southern France]. Rev Sci Tech, 24(3), 899-908.

Publication

Revue scientifique et technique (International Office of Epizootics)
ISSN: 0253-1933
NlmUniqueID: 8712301
Country: France
Language: fre
Volume: 24
Issue: 3
Pages: 899-908

Researcher Affiliations

Leblond, A
  • Unité Environnement et prévisions de la santé des populations, Ecole nationale vétérinaire de Lyon, 1 avenue Bourgelat, 69280 Marcy-l'Etoile, France.
Pradier, S
    Pitel, P H
      Fortier, G
        Boireau, P
          Chadoeuf, J
            Sabatier, P

              MeSH Terms

              • Anaplasma phagocytophilum / immunology
              • Animals
              • Antibodies, Bacterial / blood
              • Antibodies, Protozoan / blood
              • Arachnid Vectors / microbiology
              • Babesia / immunology
              • Babesiosis / epidemiology
              • Babesiosis / veterinary
              • Complement Fixation Tests / methods
              • Complement Fixation Tests / veterinary
              • Ehrlichiosis / epidemiology
              • Ehrlichiosis / veterinary
              • Enzyme-Linked Immunosorbent Assay / methods
              • Enzyme-Linked Immunosorbent Assay / veterinary
              • Female
              • France / epidemiology
              • Horse Diseases / epidemiology
              • Horses
              • Male
              • Seroepidemiologic Studies
              • Sex Factors
              • Theileria / immunology
              • Theileriasis / epidemiology
              • Ticks / microbiology

              Citations

              This article has been cited 20 times.
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