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Faecal egg counts measured after challenge infection in two sheep breeds vaccinated against T. circumcincta. FEC are shown of sheep (CS, solid lines; CHB, dashed lines) challenged with 2000 T. circumcincta L3 three times per week for 4 weeks following immunization with an eight-protein cocktail in the context of Quil A (blue lines) or with Quil A only (red lines). Each data point represents the arithmetic mean FEC ± SEM (n = 12 for all groups except CHB vaccinated where n = 11).
