The intramammary pathogenicity of four strains of Streptococcus dysgalactiae was measured by infusion of small numbers of bacteria (8–16 colony-forming units) into the teat sinus after milking. Significant differences in the infectivity of strains were detected.
BramleyA. J.1976; Variations in the susceptibility of lactating and non-lactating bovine udders to infection when infused with Escherichia coli. J. Dairy Res 43:205
CarrollE. J.,
JainN. C.,
SchalmO. W.,
LasmanisJ.1973; Experimentally induced coliform mastitis: inoculation of udders with serum-sensitive and serum-resistant organisms. Am. J. vet. Res 34:1143
DiernhoferK.1932; Asculinbouillon als Hilfsmittel fur die Differenzierung von Euterund Milchstreptokokken bei Massenuntersuchungen. Milchwirtschaftliche Forschungen 13:368
EdwardsS. J.1932; Studies on bovine mastitis. VI. The non-haemolytic streptococci of bovine mastitis and their relationship to certain saprophytic streptococci from cattle. J. comp. Path. Ther 45:43
FrostA. J.,
WanasingheD. D.,
WoolcockJ. B.1977; Some factors affecting selective adherence of microorganisms in the bovine mammary gland. Infect. Immun 15:245
GarvieE. I.,
BramleyA. J.1979; Streptococcus bovis—an approach to its classification and its importance as a cause of bovine mastitis. J. appl. Bact 46:557
ReiterB.,
BramleyA. J.1975; Defence mechanisms of the udder and their relevance to mastitis control. In Proc. seminar on mastitis control Annual Bulletin no. 85 International Dairy Fedn; Brussels: p 21
WilsonC. D.,
KingwillR. G.1975; A practical mastitis control routine. In Proc. seminar on mastitis control Annual Bulletin no 85 International Dairy Fedn; Brussels: p 422