Survey of Infectious Etiologies of Bovine Abortion during Mid- to Late Gestation in Dairy Herds

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Barkallah, Mohamed ; Gharbi, Yaakoub ; Ben Hassena, Amal ; Ben Slima, Ahlem ; Mallekh, Zouhir ; Gautier, Michel ; Greub, Gilbert ; Gdoura, Radhouane (2014)
  • Publisher: Public Library of Science
  • Journal: volume 9, issue 3 (issn: 1932-6203, eissn: 1932-6203)
  • Related identifiers: pmc: PMC3963856, doi: 10.1371/journal.pone.0091549
  • Subject: infection | Research Article | Molecular Cell Biology | santé animale | Microbiology and Parasitology | Veterinary Microbiology | infection bactérienne | bovin;étiologie;avortement;infection;bactérie pathogène;détection moléculaire | avortement | gestation | étiologie | Biology and Life Sciences | Veterinary Science | afrique | Microbiology | Medicine | détection moléculaire | Q | R | Cell Biology | bactérie pathogène | Science | bovin | Microbiologie et Parasitologie | [ SDV.MP ] Life Sciences [q-bio]/Microbiology and Parasitology
    mesheuropmc: bacterial infections and mycoses

Bovine abortion of unknown infectious etiology still remains a major economic problem. Thus, we investigated whether Brucella spp., Listeria monocytogenes, Salmonella spp., Campylobacter spp. and Coxiella burnetii are associated with abortion and/or stillbirth in Tunisian dairy cattle. Using a pan-Chlamydiales PCR, we also investigated the role of Chlamydiaceae, Waddlia chondrophila, Parachlamydia acanthamoebae and other members of the Chlamydiales order in this setting. Veterinary samples taken from mid to late-term abortions from twenty dairy herds were tested. From a total of 150 abortion cases collected, infectious agents were detected by PCR in 73 (48.66%) cases, 13 (8.66%) of which represented co-infections with two infectious agents. Detected pathogens include Brucella spp (31.3%), Chlamydiaceae (4.66%), Waddlia chondrophila (8%), Parachlamydia acanthamoebae (5.33%), Listeria monocytogenes (4.66%) and Salmonella spp. (3.33%). In contrast, Campylobacter spp. and Coxiella burnetii DNA were not detected among the investigated veterinary samples. This demonstrates that different bacterial agents may cause bovine abortion in Tunisia. This is the first report suggesting the role of Parachlamydia acanthamoebae in bovine abortion in Africa. Further studies with a larger number of samples are necessary to confirm whether this emerging pathogen is directly linked to abortion in cattle.
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