Escherichia coli mastitis
Escherichia Coli Mastitis
Bacterial Factors and Host Response
by Lehtolainen, Tanja
Pages: 63
Publisher: University of Helsinki, Faculty of Veterinary Medicine, Department of Clinical Veterinary Sciences, Finland.
Edition: 2004
Language: English
Thesis level: Doctoral Dissertation
ISBN: 952-9173407 (printed)
ISBN: 952-1019034 (PDF)
Description
Mastitis caused by Escherichia coli is common in high-producing cows with a low milk somatic
cell count. The severity and outcome of E. coli mastitis vary between cows of the same herd and
between different lactation stages in the same individual. Variation in susceptibility of cows to E.
coli mastitis and disease severity can be caused by differences in infecting bacteria or cows’
immune response. Presence of some virulence factors has previously been reported in mastitiscausing
E. coli bacteria, with serum resistance being the most important one. In early lactation, the
decreased immune defence of the cow is regarded as the primary reason for increased susceptibility
to E. coli mastitis. The aim of this thesis was to investigate bacterial and host factors affecting the
severity and outcome of E. coli mastitis in dairy cows.
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