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Fig. 3 | Parasites & Vectors

Fig. 3

From: Enteric neuromodulators and mucus discharge in a fish infected with the intestinal helminth Pomphorhynchus laevis

Fig. 3

Immunoreactivity of the endocrine cells within the intestine of Squalius cephalus to met-enkephalin (a-c), leu-enkephalin (d-f), galanin (g-i), and to serotonin (l-n) antisera. The sections taken from the mid-guts of uninfected hosts (a, d, g, l) always have a lower number of immunopositive endocrine cells than those infected with the acanthocephalan Pomphorhynchus laevis (b, e, h, m). Both the open type (thin arrows) and closed type (thick arrows) immunoreactive endocrine cells can be seen (c, f), together with the open type immunoreactive endocrine cells that possess a mid-epithelial body (i), or with those that appear “reservoir-like” (n; see Results section). Scale bars: a, b, d, e, g, h, l, m: 100 μm; c, f, I, n: 20 μm

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