A revision of Petasiger Dietz, 1909 (Digenea: Echinostomatidae) and a key to its species

Faltýnková, Anna; Gibson, David I.; Kostadinova, Aneta

doi:10.1007/s11230-008-9146-6

Cited by 23 publications

(46 citation statements)

References 21 publications

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“…These differences may result from the use of uncompressed specimens in this study. Despite the noted size differences, other differential characteristics, such as the equivalent sizes of the anterior and posterior portions of the parasite, the similar widths of the cirrus pouch and the ventral sucker, the presence of vitellaria that are confluent in the region below the ventral sucker, the tandem positioning of the testes, and the arrangement and size of the collar spines, are in agreement with those reported for P. novemdecim (LUTZ, 1928;NASIR et al, 1972;FALTÝNKOVÁ et al, 2008). In addition, the specimens examined in this study have larger dimensions than those reported for P. argentinensis.…”

Section: Speciessupporting

confidence: 86%

“…Petasiger novemdecim P. caribbensis P. argentinensis Reference Present study Nasir et al, 1972Faltýnková et al, 2008Nassi, 1980Lunaschi and Drago, 2010 The specimens of P. novemdecim that were obtained from T. dominicus in Brazil have smaller measurements for some body structures than those reported for the species by other authors. These differences may result from the use of uncompressed specimens in this study.…”

Section: Speciesmentioning

confidence: 71%

“…This genus currently includes 19 valid species and has a worldwide distribution (KOSTADINOVA, 2005;FALTÝNKOVÁ et al, 2008;DRAGO, 2010). The life cycle of these parasites was elucidated by experimental infection studies and more recently with the aid of molecular approaches.…”

Section: Introductionmentioning

confidence: 99%

“…Cercariae were studied using vital stains and were later killed in water at 70°C and fixed in 10% formalin solution. Parasites were identified using taxonomic keys and species descriptions from different authors (LUTZ, 1928;NASIR et al, 1972;NASSI, 1980;KOSTADINOVA, 2005;FALTÝNKOVÁ et al, 2008;DRAGO, 2010). Morphometric data, presented in micrometers, are given as the mean followed by the standard deviation and range in parentheses.…”

Section: Introductionmentioning

confidence: 99%

“…Morphometric data, presented in micrometers, are given as the mean followed by the standard deviation and range in parentheses. Relationships (ratios) between measurements of the internal structures of adult parasites were determined according to Faltýnková et al (2008) and Lunaschi and Drago (2010). The specimens studied were deposited in the collection of the Laboratory of Taxonomy and Biology of Invertebrates, Department of Parasitology, Federal University of Minas Gerais, Brazil, under the access number DPIC 2457-2459.…”

Section: Introductionmentioning

confidence: 99%

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Petasiger Dietz, 1909 (Trematoda: Echinostomatidae) in Birds and Mollusks from Brazil

Pinto

Mahecha

Melo

2013

Rev. Bras. Parasitol. Vet.

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Species of Petasiger Dietz, 1909 are intestinal trematodes of aquatic birds. Despite the diversity of described species in Europe and North America, only two South American species are known and no species have been previously reported in birds from Brazil. During a study of helminths recovered from the Least Grebe, Tachybaptus dominicus (Linnaeus, 1766), from the state of Minas Gerais, Brazil, adult trematodes identified as Petasiger novemdecim Lutz, 1928 were found. The prevalence of infection was 55% (5/9), and the mean intensity of infection was 8 (1-32) parasites. Additionally, Biomphalaria straminea (Dunker, 1848) and Biomphalaria tenagophila (d'Orbigny, 1835) obtained from aquatic collections in the same state were found to harbor two species of echinostome cercariae of the Magnacauda group. These cercariae developed into metacercariae in experimentally infected Poecilia reticulata Peters, 1859. Attempts to obtain adult parasites in vertebrate host models (mice, chickens, ducks and canaries) were unsuccessful. The present study is the first report of Petasiger in Brazilian birds and the first morphological description of larvae of these parasites in Brazilian mollusks. Taxonomic aspects related to South American species of Petasiger are discussed. It is suggested that, based on significant morphological differences observed in larval stages (i.e., larval dimensions) and adult parasites (i.e., disposition of the testes), Petasiger caribbensis Nassi, 1980 should be reconsidered as a distinct species from P. novemdecim.Keywords: Trematodes, grebes, mollusks, cercariae, Petasiger, Brazil. ResumoEspécies do gênero Petasiger Dietz, 1909 são trematódeos intestinais de aves aquáticas. Apesar da diversidade de espécies descritas na Europa e América do Norte, somente duas espécies são conhecidas na América do Sul, e nenhuma espécie reportada previamente em aves do Brasil. Durante o estudo de helmintos recuperados de Mergulhão pequeno, Tachybaptus dominicus (Linnaeus, 1766), do estado de Minas Gerais, Brasil, trematódeos adultos identificados como Petasiger novemdecim Lutz, 1928 foram encontrados. A prevalência de infecção foi 55% (5/9) e a intensidade média de infecção 8 (1-32) parasitos. Adicionalmente, Biomphalaria straminea (Dunker, 1848) e Biomphalaria tenagophila (d'Orbigny, 1835) obtidas em coleções aquáticas do mesmo estado foram encontradas albergando duas espécies de cercárias do tipo equinóstoma pertencentes ao grupo Magnacauda. Estas cercárias desenvolveram-se em metacercárias em Poecilia reticulata Peters, 1859 experimentalmente infectados. Tentativas de obtenção de parasitos adultos em modelos experimentais (camundongos, frangos, patos e canários) demonstraram-se sem sucesso. O presente estudo é o primeiro relato de Petasiger em aves brasileiras e primeira descrição morfológica de larvas destes parasitos em moluscos do Brasil. Aspectos taxonômicos relacionados às espécies sul-americanas de Petasiger são discutidos. Sugere-se que, em vista das diferenças morfológicas observadas nos estágios larv...

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Section: Speciessupporting

confidence: 86%

Section: Speciesmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Petasiger Dietz, 1909 (Trematoda: Echinostomatidae) in Birds and Mollusks from Brazil

Pinto

Mahecha

Melo

2013

Rev. Bras. Parasitol. Vet.

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Make visible the invisible: Optimized development of an environmental DNA metabarcoding tool for the characterization of trematode parasitic communities

et al. 2022

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Trematode-associated morbidity and mortality of tadpoles in Israel

2014

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Amphibians stand at the forefront of the global biodiversity crisis. The causes of their decline are diverse and include a rise in amphibian malformations due to various factors, especially trematode infection. However, linking amphibian mortality and morbidity with trematode infection has proven to be challenging due to the complex life cycle of the trematodes and the fact that trematodes are nonfastidious in their choice of definitive hosts. In Israel, the decline in local amphibian populations has been mostly attributed to the loss and degradation of wetlands and riparian habitats. Recently, however, there have been several reports of morbidity and mortality of tadpoles with signs of edema and malformations from various localities in Israel. We collected dead and morbid tadpoles and metamorphs of Hyla savignyi and Pelophylax bedriagae, and we showed that the morbidity and the deformations observed in the field are the result of infection by trematodes. We also isolated an echinostomatid trematode from the malformed and edematous tadpoles and from the freshwater snail Bulinus truncatus, all from the same site. We further succeeded in experimentally infecting H. savignyi tadpoles by echinostomatid cercariae that were shed from the snails, and we showed that infection had significantly increased the mortality rates of these tadpoles. The combination of high trematode prevalence and their pathogenic effects suggests that in nature, the effect of echinostome infection on amphibians may be substantial and could become an emerging disease in Israel.

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A revision of Petasiger Dietz, 1909 (Digenea: Echinostomatidae) and a key to its species

Cited by 23 publications

References 21 publications

Petasiger Dietz, 1909 (Trematoda: Echinostomatidae) in Birds and Mollusks from Brazil

Petasiger Dietz, 1909 (Trematoda: Echinostomatidae) in Birds and Mollusks from Brazil

Make visible the invisible: Optimized development of an environmental DNA metabarcoding tool for the characterization of trematode parasitic communities

Trematode-associated morbidity and mortality of tadpoles in Israel

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