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Figure 4 | Veterinary Research

Figure 4

From: Dynamics of the natural transmission of bovine spongiform encephalopathy within an intensively managed sheep flock

Figure 4

Diagrammatic representation of the progression of BSE infection in 13 dams that produced the 14 infected offspring. (S, ARQ Suffolk sheep, R, ARQ Romney sheep, C, VRQ Cheviot sheep). *These dam ID numbers coincide with those in Table 3. Green diamonds, age at inoculation. Circles, biopsy result (white, last negative; red, first positive). L within white square, age at lambing. Stars next to lambing, placenta result (white, negative; red, positive). X, stillbirth. Black squares, dam’s age at death of BSE (note that some squares appear partially hidden because of proximity between lambing and death). Blue and white squares, age at death of infected and non-infected progeny, respectively (indicated by digits, discontinuous lines are not representative).

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