Co-Authors:
Leitner, G., National Mastitis Reference Center, Kimron Veterinary Institute, P.O. Box 12, Bet Dagan, Israel
Jacoby, S., Institute of Animal Science, A.R.O. The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Frank, E., Institute of Animal Science, A.R.O. The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Shacked, R., Institute of Animal Science, A.R.O. The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Abstract:
Mastitis in both clinical and subclinical forms has a significant negative affect on dairy economics. Previously, we suggested making treatment decisions according to the monthly milk testing and/or the constant online data available on each cow during routine implementation of performance evaluation and lactation. This decision relied on expected costs/losses resulting from the treatment during the cow’s productive life. This study reports on-line computerized data surveillance together with routine monthly milk quality testing for controlling mastitis and maintaining high milk yields and low somatic cell counts (SCC) in medium dairy herds. During one year of the surveillance, 77 of 220 cows were detected on-line and/or by the monthly milk testing as suspected of having intramammary infection, about 30% of them with clinical symptoms. All suspected glands were tested for the causative pathogen. Clinical infections diagnosed by the on-line and/or visual inspection, were caused by Escherichia coli, Streptococcus dysgalactiae or Strep. uberis, and in certain cases no causative agent was found. Subclinical infections were diagnosed mainly by the monthly milk testing, where the causative bacteria found were mainly Streptococcus dysgalactiae and Staphylococcus chromogenes. In some cases no causative agent was identified. Clinically infected cows were treated with penicillin and gentamycin on the day of appearance of mastitis. Following antibiotic withdrawal milk from the infected gland was tested for quality and quantity. Milking resumed from glands that returned to normal, whereas those retaining a high somatic cell count were dried-off. Some of the glands infected with Strep. dysgalactiae and Staph. were treated with Nafpenzal Dry Cow as a group. When treatment failed and bacteria were isolated in cases of cows high SCC, the cows were dried-off (300 mg Procaine benzylpenicillin (300,000 I.U.), 100 mg Dihydrostreptomycin, 100 mg Nafcillin) (Intervet, Boxmeer, The Netherlands). The bulk milk tank SCC at the beginning of the surveillance contained 240-300 × 103 cells/mL and was reduced to 93-140 × 103 cells/ mL in 7-9 months. The milk price for the bulk milk containing <200 × 103 cells mL-1 received a 0.5% bonus. © 2014, Israel Journal of Veterinary Medicine. All rights reserved.
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