The Chronology of Angiostrongylus vasorum (Baillet, 1866), Kamensky, 1905: Infection in Biomphalaria glabrata (Say, 1818)

Figure 1

Histological sections of Biomphalaria glabrata infected with 1000 L1 of Angiostrongylus vasorum. Hematoxylin and eosin staining. (a) Overview of a portion of the digestive tube with a nematode (black arrow) near the mucosa after thirty minutes of the beginning of infection; (b) larva (L1) penetrating in the epithelium of the dorsalis pedis mass of the gastropod after thirty minutes of the beginning of infection; (c) overview of the stomach region with several larvae in the lumen (black arrows), in the epithelium (white arrows), and next to the basal membrane (white asterisks) after one hour of the beginning of the infection; (d) larvae inside of the digestive gland after two hours from the beginning of infection; (e) larva (L1) penetrating the mucosa of the midgut (see expanded detail). In larger arrow, larvae located in the subconjunctival epithelial layer, two hours after the beginning of infection; (f) detail of previous photo showing a discrete local cellular reaction; (g) larva located in the hemocoel of the digestive gland showing a discrete local cellular reaction after three hours of the beginning of infection; (h) larvae inside the circulatory system (arrow) between the albumen gland (white asterisk) and the kidney (black asterisk) after four hours of the beginning of the infection. Magnifications: (a, d) 150 μm; (b, e) 50 μm; (c) 120 μm; (f): 35 μm; (g) 60 μm; (h) 160 μm.

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