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Biomedical subjects

P Winter

Publications and source records attributed to P Winter.

126 records · Page 7Linked to original sources
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[Resistance patterns of ovine mastitis pathogens].

For control of the udder health status of milk sheep the minimal inhibitory concentration of mastitis causing pathogens to 12 different chemotherapeutics was determined by means of Sensititre microplate method. 73 staphylococci- and 8 streptococci-strains was examined. Following staphylococci-strains were found: S. aureus (11), S. epidermidis (34), S. chromogenes and S. xylosus (6 each), S. hyicus and S. warneri (each 5) as well as S. sciuri and S. simulans (3 each). MIC-values to penicillin, amoxycillin and ampicillin of 2 penicillinase-positive S. aureus-strains were more than 4.0 micrograms/ml. The remaining isolates and the major part of coagulase-negative staphylococci displayed MIC-values up to 1.0 microgram/ml to beta-lactamantibiotics except cloxacillin. Against cephalosporines, cephalexin excluded, and aminoglycosides very low MIC-values concerning staphylococci were observed. In case of spiramycin MIC-levels more or less than 8.0 micrograms/ml were determined. Streptococci exhibited MIC-values in the range of 0.06 to 0.5 microgram/ml against beta-lactamantibiotics with exclusion of cloxacillin, cefoperazone and cefquinome and spiramycin as well.

Animals↗
PubMedDate not supplied

[Factors influencing the content of urea in the milk of ewes].

In total records of 363 East Friesian breed of sheep and 15 Lacaunes from 15 flocks located in Lower Austria, Upper Austria and Styria were available to investigate the influences on milk urea content. In one flock different groups of ewes were fed with low, medium and high amounts of energy and protein, but constant protein and energy ratio. The milk urea levels exhibited to statistically significant differences but the tendency of the feeding effect could be confirmed. Additional parameters influencing the urea content of milk of ewes are: herd specific factors, stage of lactation, mastitis, preservation and different analytical methods. The content of urea in milk is not suitable for assessment of the energy/protein-ratio of ewes with mastitis problems. Due to the special composition of sheep milk it is important to take account of the analytical method for determination of urea. Thus milk urea of one flock should be evaluated but not of individual sheep. In spite of these influence factors the determination of milk urea is a valuable tool for assessment of the energy and protein intake.

Animals↗