Document Detail

Influence of pulsation rate on udder health and teat thickness changes in dairy ewes.
MedLine Citation:
PMID:  12647959     Owner:  NLM     Status:  MEDLINE    
In this work on machine milking of ewes, pulsation rates of 120 and 180 cycles per min were compared, both with a pulsation ratio of 50:50 and a vacuum level of 36 kPa, comparing intramammary infection (IMI), somatic cell count (SCC) and teat end thickness changes. To this end, two groups of 20 Manchega ewes were used in a crossover experimental design with two experimental periods of 24 d for each. Bacterial exposure of all teats was increased by dipping them in a suspension of Staphylococcus simulans at four consecutive milkings of each period. Pulsation rate of 180 cycles per min, compared with 120 cycles per min, had no negative effect upon new IMI (11 and 16% of ewes infected, respectively) and SCC. No teat end lesions were observed in those animals milked with the two pulsations assayed. Also, teat thickness changes (-0.38 and -0.36 mm at 120 and 180 cycles per min, respectively) were not affected significantly. Finally, in absence of IMI, the two pulsation rates assayed did not affect the SCC.
C Peris; J R Díaz; C Segura; A Martí; N Fernández
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  86     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-03-21     Completed Date:  2003-05-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  530-7     Citation Subset:  IM    
Department of Animal Science, Universitat Politècnica de València, Camí de Vera, 14 46071 València, Spain.
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MeSH Terms
Cell Count
Dairying / instrumentation,  methods*
Gram-Positive Bacterial Infections
Iodine / administration & dosage
Mammary Glands, Animal / anatomy & histology*,  physiology*
Mastitis / epidemiology,  microbiology,  veterinary
Milk / cytology
Sheep / physiology*
Sheep Diseases / epidemiology
Staphylococcal Infections
Reg. No./Substance:

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