Characteristics and Epidemiological Investigation of Paratuberculosis in Dairy Cattle in Tai’an, China

Figure 3

Pathological changes of the diseased cows. (a) Multinuclear giant cells (arrows) in the mesenteric lymph nodes; HE, 400x. (b) Infiltration of lymphocytes and macrophages into the lamina propria of the jejunum; HE, 100x. (c) Infiltration of hyperplastic lymphocytes, macrophages, and epithelioid cells into the ileal lamina propria and submucosa; HE, 400x. (d) Infiltration of hyperplastic lymphocytes, macrophages, and epithelioid cells into the cecum lamina propria and submucosa; HE, 100x and 400x. (e) There is an abundance of AFB (arrows) in the epithelioid cells of the ileal lamina propria; AFB, 400x. (f) There are many AFB (arrows) in the multinuclear giant cells of the mesenteric lymph nodes; AFB, 400x.

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