Article

Alexander A. Vedernikov, PhD, Associate Professor, Mari State University (424000, Russia, Republic of Mari El, Yoshkar-Ola, Lenina sq., 1); e-mail: aa.vedernikov90@gmail.com
Anton O. Svinin, PhD, Senior Lecturer, Mari State University (424000, Russia, Republic of Mari El, Yoshkar-Ola, Lenina sq., 1); e-mail: ranaesc@gmail.com
Oleg A. Ermakov, PhD, Associate Professor, Penza State University (440026, Russia, Penza, Lermontova Street, 37, building 15); e-mail: oaermakov@list.ru
Yulia A. Chelyadnikova, Student, Mari State University (424000, Russia, Republic of Mari El, Yoshkar-Ola, Lenina sq., 1).
Grigoriy A. Musatov, Student, Mari State University (424000, Russia, Republic of Mari El, Yoshkar-Ola, Lenina sq., 1).
Galina P. Drobot, PhD, Associate Professor, Mari State University (424000, Russia, Republic of Mari El, Yoshkar-Ola, Lenina sq., 1); e-mail: droga59@mail.ru

Vedernikov A.A., Svinin A.O., Ermakov O.A., Chelyadnikova Yu.A., Musatov G.A., Drobot G.P. 2020. Granulomatous inflammations in the intestine of Pelophylax ridibundus (Anura: Ranidae) caused by Brandesia turgida (Plathelminthes: Digenea). Nature Conservation Research 5(Suppl.2): 72–76. https://dx.doi.org/10.24189/ncr.2020.027

The report provides data on granulomatous inflammation in the small intestine of Pelophylax ridibundus, observed in exophytic outgrowths (diverticulums) of duodenum and caused by Brandesia turgida. Amphibians were collected from Protected Areas (Privolzhskaya Lesostep' State Nature Reserve, Penza region, and Sosnovaya Roscha Forest Park near the town Yoshkar-Ola) during the field seasons of 2011–2018. An histological examination was made according to standard histological procedures; we used hematoxylin and eosin stain. The trematode Brandesia turgida was found not only in the Lieberkühn glands, but also in the serosa. Non-caseating epithelioid granulomas were localised in the serosa. Macrophages and single multinuclear Pirogov-Langhans giant cells were also detected in the serosa. Granular decay, puckering of nuclei and nuclear detritus were detected. Marked leukocyte infiltration with a significant predominance of eosinophils was observed. The periphery of such granulomas can be characterised by a lymphohistiocytic profile. Mycobacterial infection was not detected. The obtained data describe a new case of granulomatous inflammation in amphibians.

28S rRNA, histopathology, host-parasite interactions, morphology, trematode invasion

Received: 30.03.2020. Revised: 11.05.2020. Accepted: 15.05.2020.

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