First report of Chlamydophila abortus infection in the dromedary camel (Camelus dromedarius) population in eastern Algeria

Benaissa Mohamed Houcine, Mimoune Nora, Youngs Curtis R., Kaidi Rachid, Faye Bernard. 2020. First report of Chlamydophila abortus infection in the dromedary camel (Camelus dromedarius) population in eastern Algeria. Comparative Immunology, Microbiology and Infectious Diseases, 73:101557, 6 p.

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Abstract : Chlamydiosis is caused by an obligate intracellular gram-negative bacterium of the genus Chlamydophila which is a zoonotic pathogen. The objectives of the study were to identify the seroprevalence of antibodies against Chlamydophila abortus in dromedary camel herds from four districts in eastern Algeria, as well as to estimate the association between seroprevalence and certain factors present at the animal and herd levels. Blood samples were collected from a random sample of animals within each of 82 camel herds. Serum samples were subjected to a C. abortus ELISA test, and association between the presence of antibodies and potential risk factors was estimated. Animal and herd seroprevalence were 2.5 % and 15.8 %, respectively, indicating substantial exposure of camels to C. abortus in the four districts studied. Age, breed, and sex did not influence seroprevalence in tested animals. Based on the univariate analysis, contact with sheep and goats, contact with other camel herds, and histories of abortion were major risk factors for infection. By using multivariate analysis, contact of camels with sheep and goats and with others camel herds, through shared grazing or watering points, were important factors for transmission of chlamydiosis with an odds ratio of 3.3 and 9.4, respectively. At the herd level the introduction of purchased animals was the major risk factor. This baseline information will be highly useful for launching C. abortus control programs in the region and potentially elsewhere.

Mots-clés Agrovoc : Chlamydophila abortus [EN], Dromadaire, Facteur de risque, Anticorps, Infection, zoonose

Mots-clés géographiques Agrovoc : Algérie

Mots-clés complémentaires : Camelus dromedarius, séroprévalence

Mots-clés libres : Algeria, Camels, Chlamydophila abortus, Risk factors, Seroprevalence

Classification Agris : L73 - Animal diseases
L70 - Veterinary science and hygiene - General aspects

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

  • Benaissa Mohamed Houcine, CRSTRA (DZA) - auteur correspondant
  • Mimoune Nora, National High School of Veterinary Medicine (DZA)
  • Youngs Curtis R., Iowa State University (USA)
  • Kaidi Rachid, Université de Blida (DZA)
  • Faye Bernard, CIRAD-ES-UMR SELMET (FRA)

Source : Cirad-Agritrop (

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