Haemolytic Mannheimia in Healthy Sheep in Norway
Author Information
Author(s): Poulsen Louise L, Reinert Turið M, Sand Rikke L, Bisgaard Magne, Christensen Henrik, Olsen John E, Stuen Snorre, Bojesen Anders M
Primary Institution: Department of Veterinary Pathobiology, The Royal Veterinary and Agricultural University
Hypothesis
What is the occurrence of haemolytic Mannheimia species in apparently healthy sheep in Norway?
Conclusion
A significant number of healthy sheep in Norway carry potentially pathogenic Mannheimia species in their upper respiratory tract.
Supporting Evidence
- Mannheimia species were isolated from 24% to 64% of the sheep in the four flocks.
- A total of 57 Mannheimia isolates were obtained in pure culture.
- The study found a considerable genetic diversity among the isolates.
Takeaway
This study found that many healthy sheep in Norway have bacteria that could make them sick, even if they look fine.
Methodology
Nasal swabs were taken from sheep and cultured to isolate Mannheimia species, which were then characterized phenotypically and genotypically.
Limitations
The study only sampled nasal cavities and not tonsils, which may have affected isolation rates.
Participant Demographics
Adult sheep from four different flocks in South-Western Norway.
Digital Object Identifier (DOI)
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