Fecal non-aureus Staphylococci are a potential cause of bovine intramammary infection

The presence of non-aureus staphylococci (NAS) in bovine rectal feces has recently been described. Similar to other mastitis causing pathogens, shedding of NAS in the environment could result in intramammary infection. The objective of this study was to investigate whether NAS strains present in fec...

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Bibliographic Details
Published in:Veterinary research (Paris) 2020-03, Vol.51 (1), p.32-32, Article 32
Main Authors: Wuytack, Ameline, De Visscher, Anneleen, Piepers, Sofie, Haesebrouck, Freddy, De Vliegher, Sarne
Format: Article
Language:English
Subjects:
Bacteria
Cattle
Dairy cattle
Deoxyribonucleic acid
DNA
Feces
Genetic testing
Infection
Infections
Life Sciences
Mastitis
Medical research
Milk
Nucleic acids
Pathogenic microorganisms
Polymerase chain reaction
Staphylococcal infections
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Summary:The presence of non-aureus staphylococci (NAS) in bovine rectal feces has recently been described. Similar to other mastitis causing pathogens, shedding of NAS in the environment could result in intramammary infection. The objective of this study was to investigate whether NAS strains present in feces can cause intramammary infection, likely via teat apex colonization. During a cross-sectional study in 5 dairy herds, samples were collected from the habitats quarter milk, teat apices, and rectal feces from 25%, 10%, and 25% of the lactating cows, respectively, with a cow serving as the source of one type of sample only. Samples from clinical mastitis cases were continuously collected during the 1-year study period as well. The 6 most prevalent NAS species, Staphylococcus (S.) chromogenes, S. cohnii, S. devriesei, S. equorum, S. haemolyticus, and S. hominis, were further subtyped by random amplification of polymorphic deoxyribonucleic acid polymerase chain reaction (RAPD-PCR), when the same NAS species was present in the same herd in the three habitats. For S. chromogenes, S. cohnii, S. devriesei, and S. haemolyticus, the same RAPD type was found in rectal feces, teat apices, and quarter milk, indicating that fecal NAS can infect the mammary gland. For S. hominis and S. equorum, we were unable to confirm the presence of the same RAPD types in the three habitats.
ISSN:1297-9716
0928-4249
1297-9716
DOI:10.1186/s13567-020-00761-5