Bacteriological etiology and treatment of mastitis in Finnish dairy herds
| Autor: | Anna-Maija Heikkilä, Suvi Taponen, Johanna Vakkamäki, Satu Pyörälä |
|---|---|
| Přispěvatelé: | Departments of Faculty of Veterinary Medicine, University of Helsinki, Production Animal Medicine |
| Rok vydání: | 2017 |
| Předmět: |
Veterinary medicine
UDDER HEALTH MANAGEMENT Animal Culling Culling 413 Veterinary science Polymerase Chain Reaction 0403 veterinary science Mastitis Bovine Finland 2. Zero hunger lcsh:Veterinary medicine biology COAGULASE-NEGATIVE STAPHYLOCOCCI food and beverages 04 agricultural and veterinary sciences General Medicine Corynebacterium bovis Staphylococcal Infections 3. Good health Dairying Milk PCR Female Staphylococcus aureus SOMATIC-CELL COUNT POLYMERASE-CHAIN-REACTION 040301 veterinary sciences MILK SAMPLES Staphylococcal infections Animal science INTRAMAMMARY INFECTION medicine Animals BACTERIAL CULTURE Streptococcus uberis Bovine mastitis General Veterinary business.industry Research 0402 animal and dairy science Bacteriology biology.organism_classification medicine.disease 040201 dairy & animal science Mastitis Treatment RISK-FACTORS Herd lcsh:SF600-1100 Cattle CLINICAL MASTITIS Streptococcus dysgalactiae business Somatic cell count |
| Zdroj: | Acta Veterinaria Scandinavica, Vol 59, Iss 1, Pp 1-9 (2017) Acta Veterinaria Scandinavica |
| ISSN: | 1751-0147 |
| DOI: | 10.1186/s13028-017-0301-4 |
| Popis: | Background: The Finnish dairy herd recording system maintains production and health records of cows and herds. Veterinarians and farmers register veterinary treatments in the system. Milk samples for microbiological analysis are routinely taken from mastitic cows. The laboratory of the largest dairy company in Finland, Valio Ltd., analyzes most samples using real-time PCR. This study addressed pathogen-specific microbiological data and treatment and culling records, in combination with cow and herd characteristics, from the Finnish dairy herd recording system during 2010-2012. Results: The data derived from 240,067 quarter milk samples from 93,529 dairy cows with mastitis; 238,235 cows from the same herds served as the control group. No target pathogen DNA was detected in 12% of the samples. In 49% of the positive samples, only one target species and in 19%, two species with one dominant species were present. The most common species in the samples with a single species only were coagulase-negative staphylococci (CNS) (43%), followed by Staphylococcus aureus (21%), Streptococcus uberis (9%), Streptococcus dysgalactiae (8%), Corynebacterium bovis (7%), and Escherichia coli (5%). On average, 36% of the study cows and 6% of the control cows had recorded mastitis treatments during lactation. The corresponding proportions were 16 and 6% at drying-off. For more than 75% of the treatments during lactation, diagnosis was acute clinical mastitis. In the milk samples from cows with a recorded mastitis treatment during lactation, CNS and S. aureus were most common, followed by streptococci. Altogether, 48% of the cows were culled during the study. Mastitis was reported as the most common reason to cull; 49% of study cows and 18% of control cows were culled because of mastitis. Culling was most likely if S. aureus was detected in the milk sample submitted during the culling year. Conclusions: The PCR test has proven to be an applicable method also for large-scale use in bacterial diagnostics. In the present study, microbiological diagnosis was unequivocal in the great majority of samples where a single species or two species with one dominating were detected. Coagulase-negative staphylococci and S. aureus were the most common species. S. aureus was also the most common pathogen among the culled cows, which emphasizes the importance of preventive measures. |
| Databáze: | OpenAIRE |
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