Hedruris has a worldwide distribution, parasitizing lampreys, fishes, frogs, and lizards. In South America, 4 species have been reported on frogs (Hedruris heyeri, Hedruris juninensis, Hedruris moniezi, and Hedruris mucronifer), 3 on fishes (Hedruris basilichtensis, Hedruris orestiae, and Hedruris suttonae), and 1 on turtles (Hedruris dratini). We examined a frog (Pseudis minuta) found dead in the Pescado stream, Argentina, searching for parasites. A Hedruris sp. was found and subsequently subjected to integrative analyses. The 18S rDNA was sequenced, and specimens were examined using electron and optical microscopy. Genetic analysis grouped this nematode with H. dratini. Its morphology was similar to that species but differed in having bifid derid in frogs, compared to a simple deirid in turtles. This difference could result from various causes, such as host-parasite interaction or a teratological feature, or it could indicate high morphological variability. To resolve this, molecular analysis of all described Hedruris species is necessary, in addition to morphological studies. According to the prevalence and intensity of infection reported in the literature, the definitive host of H. dratini is likely the turtle. However, the nematode may use different hosts, or the frog may have ingested an amphipod harboring the parasite’s intermediate stage. This is the first Hedruris parasite of frogs to be sequenced and represents, after H. mucronifer, the second report of the genus in anurans from Argentina.
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1 November 2024
Research Article|
November 08 2024
MOLECULAR AND NEW MORPHOLOGICAL DATA ON NEMATODE HEDRURIS DRATINI FOUND PARASITIZING PSEUDIS MINUTA (ANURA: HYLIDAE)
Martin M. Montes;
1Centro de Estudios Parasitológicos y Vectores (CEPAVE), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata (CCT, CONICET-UNLP), La Plata (1900), Buenos Aires, Argentina
Correspondence should be sent to Martin M. Montes (https://orcid.org/0000-0002-7177-333X) at: [email protected]
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Yasmin Croci;
Yasmin Croci
1Centro de Estudios Parasitológicos y Vectores (CEPAVE), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata (CCT, CONICET-UNLP), La Plata (1900), Buenos Aires, Argentina
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Jorge Barneche;
Jorge Barneche
1Centro de Estudios Parasitológicos y Vectores (CEPAVE), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata (CCT, CONICET-UNLP), La Plata (1900), Buenos Aires, Argentina
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Dario Balcazar;
Dario Balcazar
1Centro de Estudios Parasitológicos y Vectores (CEPAVE), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata (CCT, CONICET-UNLP), La Plata (1900), Buenos Aires, Argentina
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German F. Reig Cardarella;
German F. Reig Cardarella
2Escuela de Tecnología Médica y Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O’Higgins, Santiago de Chile (8370993), Región Metropolitana, Chile
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Sergio R. Martorelli
Sergio R. Martorelli
1Centro de Estudios Parasitológicos y Vectores (CEPAVE), Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de La Plata (CCT, CONICET-UNLP), La Plata (1900), Buenos Aires, Argentina
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J Parasitol (2024) 110 (6): 551–557.
Citation
Martin M. Montes, Yasmin Croci, Jorge Barneche, Dario Balcazar, German F. Reig Cardarella, Sergio R. Martorelli; MOLECULAR AND NEW MORPHOLOGICAL DATA ON NEMATODE HEDRURIS DRATINI FOUND PARASITIZING PSEUDIS MINUTA (ANURA: HYLIDAE). J Parasitol 1 November 2024; 110 (6): 551–557. doi: https://doi.org/10.1645/22-34
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