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- Title
Helicobacter bilis and Helicobacter trogontum: infectious causes of abortion in sheep.
- Authors
Gill, John; Haydon, Taryrn G.; Rawdon, Thomas G.; McFadden, Andrew M. J.; Ha, Hye-Jeong; Shen, Zeli; Feng, Yan; Pang, Jassia; Swennes, Alton G.; Paster, Bruce J.; Dewhirst, Floyd E.; Fox, James G.; Spence, Richard P.
- Abstract
The aim of our study was to determine the association of Helicobacter spp. that had flexispira morphology with ovine abortion, and to understand the importance of these organisms as a cause of ovine abortion in New Zealand. A retrospective diagnostic survey was carried out on laboratory submissions from ovine abortion outbreaks. A comparison was made of the proportion of laboratory submissions where Helicobacter spp. were detected from flocks that had no other agent identified (group A) with a group that had a known cause of abortion identified (group B). This latter group was considered to be a negative control, given the premise that Helicobacter spp. were not causing abortions and that Helicobacter spp. should be present at a lower rate in the group. Where no diagnosis had been made, aborted material was positive for Helicobacter spp. with flexispira morphology in 8 submissions (20%, 8/40) from 5 of the 31 survey farms (16%, 5/31). Helicobacter spp. were not detected in any of the 18 submissions from the 17 control farms (group B). Helicobacter spp. were confirmed by 16S ribosomal RNA sequencing of 3 of the Helicobacter spp. isolated by culture from the livers of aborted sheep fetuses, and 7 of the 8 where samples were positive in a Helicobacter PCR assay. The Helicobacter spp. were identified as Helicobacter trogontum (Flexispira taxon 5 genotype) and Helicobacter bilis (Flexispira taxon 8 genotype). The findings support Helicobacter spp. being a probable causative agent of ovine abortions in New Zealand.
- Subjects
HELICOBACTER diseases; SHEEP diseases; SHEEP; ABORTION; ABORTION in animals; VETERINARY pathology
- Publication
Journal of Veterinary Diagnostic Investigation, 2016, Vol 28, Issue 3, p225
- ISSN
1040-6387
- Publication type
Article
- DOI
10.1177/1040638716638704