Publication details

Ultrastructure of the digestive tract of Paradiplozoon homoion (Monogenea)

Authors

KONSTANZOVÁ Veronika KOUBKOVÁ Božena KAŠNÝ Martin ILGOVÁ Jana DZIKA Ewa GELNAR Milan

Year of publication 2015
Type Article in Periodical
Magazine / Source Parasitology Research
MU Faculty or unit

Faculty of Science

Citation
Web http://link.springer.com/article/10.1007/s00436-015-4331-4
Doi http://dx.doi.org/10.1007/s00436-015-4331-4
Field Animal diseases, veterinary medicine
Keywords Paradiplozoon homoion Monogenea Ultrastructure Digestive tract Haematin cell
Description Paradiplozoon homoion is a representative of blood-feeding ectoparasites from the family Diplozoidae (Polyopisthocotylea, Monogenea). Although these worms have been the subject of numerous taxonomical, phylogenetic and ecological studies, the ultrastructure of the alimentary system and related structures, as well as the mechanisms of essential processes like fish blood digestion, remain mostly unknown. Our observation of P. homoion using a transmission electron microscopy (TEM) revealed two main types of digestive cells - U-shaped haematin cells and connecting syncytium. Particular structures such as mouth cavity with specialized receptors, two oval-shaped muscular buccal suckers, pharynx surrounded with the glandular cells, oesophagus, the intestinal caeca with intact erythrocytes in the lumen, the apical pinocytotic fibrous surface complex and haematin vesicles of U-shape cells have been shown in detail. According to our results the P. homoion is degrading the blood components predominantly intracellularly.
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