Survey of Anaplasmataceae bacteria in sheep from Senegal.

Trop Anim Health Prod

Department of Microbiology, National Laboratory for Research on Animal Diseases, Hann, Dakar, BP2057, Senegal.

Published: October 2013

AI Article Synopsis

  • The study focused on identifying bacteria from the Anaplasmataceae family that cause acute illnesses in sheep in West Africa.
  • In Senegal, researchers sampled 120 febrile sheep, analyzing blood DNA using PCR techniques, which led to successful identification of bacterial agents in most cases.
  • The findings revealed a diverse range of pathogenic bacteria, with A. ovis being prevalent, and for the first time detected A. phagocytophilum in sub-Saharan Africa, suggesting a need for further investigation into its epidemiology and the roles of other related Anaplasma species.

Article Abstract

Purpose: The authors studied the role of bacteria belonging to Anaplasmataceae family as the causes of acute illnesses of sheep in West Africa.

Methods: We examined and sampled 120 febrile sheep in two regions of Senegal for this study. The DNA extracted from these blood samples was tested by PCR using two pairs of primers (groEL-based and 16S rRNA gene-based).

Results: In 52/120 samples, the microscopic examination revealed intraerythrocytic and/or intraphagocytic spherical inclusions. In 48/52 cases, we succeeded in identifying the bacterial agent: in 38 cases, it was Anaplasma ovis; in six cases, it was Ehrlichia ruminantium; in two cases, Anaplasma phagocytophilum; in one case, Anaplasma platys; and in one case, a yet uncultured Anaplasma sp. closely related to A. phagocytophilum.

Conclusions: Our studies demonstrated the great variety of pathogenic bacteria from the Anaplasmataceae family in the blood of clinically ill sheep. A. ovis was identified unexpectedly often. For the first time, A. phagocytophilum was found in sub-Saharan Africa, and its further epidemiology may be now reconsidered. The roles of canine pathogen, A. platys, and yet undescribed Anaplasma sp. "Badiouré" in ovine pathology should be more closely studied.

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Source
http://dx.doi.org/10.1007/s11250-013-0399-yDOI Listing

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