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Fig. 2 | IMA Fungus

Fig. 2

From: A severe microsporidian disease in cultured Atlantic Bluefin Tuna (Thunnus thynnus)

Fig. 2

Micrographs of Glugea thunni from histological sections of the caecal mass of Thunnus thynnus from the Mediterranean Sea. a G. thunni xenomas in the mesentery among the intestinal caeca (scale bar 1 mm). b Cyst of G. thunni; xenoma exhibits peripheral spots with different degrees of melanization (scale bar 200 µm). c Detail of peripheral xenoma melanization (scale bar 70 µm). d Cyst wall with eosinophilic granule cell in the outer celular layer (scale bar 40 µm). e Microspores at the central region of xenoma (scale bar 10 µm) with a detail including an abnormal microspore (scale bar 5 µm) (ad, paraffin sections stained in H–W; e, semi-thin stained in toluidine blue). White arrow—eosinophilic granule cell; black asterisk—xenoma; white asterisk—melanized spot; white diamond—acellular/fibrous layer; white arrowhead—disintegrated acellular/fibrous layer; black arrowhead—parasitophorus vesicle

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