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Intramammary infections with Corynebacterium spp. in bovine lactating udder quarters.
- Source :
-
PloS one [PLoS One] 2022 Jul 07; Vol. 17 (7), pp. e0270867. Date of Electronic Publication: 2022 Jul 07 (Print Publication: 2022). - Publication Year :
- 2022
-
Abstract
- Corynebacterium spp. are frequently detected in bovine quarter milk samples, yet their impact on udder health has not been determined completely. In this longitudinal study, we collected quarter milk samples from a dairy herd of approximately 200 cows, ten times at 14 d intervals. Bacteriologically, Catalase-positive and Gram-positive rods were detected in 22.7% of the samples. For further species diagnosis, colonies were analyzed by MALDI-TOF MS. Corynebacterium bovis, C. amycolatum, C. xerosis and 10 other Corynebacterium spp. were detected. The three aforementioned species accounted for 88.4%, 8.65% and 0.94% of all cultured Corynebacterium spp., respectively. For further evaluation of infection dynamics, the following three infection definitions were applied: A (2/3 consecutive samples positive for the same species), B (≥1000 cfu/mL in one sample), C (isolated from a clinical mastitis case). Infections according to definition B occurred most frequently and clinical mastitis with Corynebacterium spp. occurred once during sampling. Life tables were used to determine the duration of infection. According to infection definition A, infection durations of 111 d and 98 d were obtained for C. bovis and C. amycolatum, respectively. Exemplarily, longer lasting infections were examined for their strain diversity by RAPD PCR. A low strain diversity was found in the individual quarters that indicates a longer colonization of the udder parenchyma by C. bovis and C. amycolatum.<br />Competing Interests: The authors have declared that no competing interests exist.
- Subjects :
- Animals
Cattle
Corynebacterium genetics
Female
Humans
Lactation
Longitudinal Studies
Mammary Glands, Animal microbiology
Milk microbiology
Random Amplified Polymorphic DNA Technique
Corynebacterium Infections epidemiology
Corynebacterium Infections microbiology
Corynebacterium Infections veterinary
Mastitis, Bovine epidemiology
Mastitis, Bovine microbiology
Staphylococcal Infections microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 17
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 35797266
- Full Text :
- https://doi.org/10.1371/journal.pone.0270867