Putative new genera and species of avian schistosomes potentially involved in human cercarial dermatitis in the Americas, Europe and Africa

Pinto, Hudson Alves; Pulido-Murillo, Eduardo A.; Melo, Alan Lane de; Brant, Sara V.

doi:10.1016/j.actatropica.2017.09.016

Cited by 14 publications

(26 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in sharp contrast with the wealth of knowledge gathered about the mammalian and avian schistosomes with freshwater-based life-cycles, and information concerning the natural history of most marine schistosomes is scarce. The slow rates in recovering marine schistosomes, low species richness recorded in snail hosts and the convoluted taxonomy of the group, including separate taxonomic treatments of the distinct life-cycle stages, re ects the scarcity of data [47]. Matching sequence data for different life-cycle stages and across distant localities has accelerated life-cycles elucidations and hostparasite associations [4,5].…”

Section: Discussionmentioning

confidence: 99%

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Khosravi

Thieltges

Shamseddin

et al. 2022

Preprint

View full text Add to dashboard Cite

Background: Avian schistosomes comprise a diverse and widespread group of trematodes known for their surprising ability to switch into new hosts and habitats. Their cercariae are the causative agents of the waterborne allergic disease cercarial dermatitis. There are 13 recognised genera of avian schistosomes with majority of the extant species with freshwater-based life-cycles. Despite the considerable research attention on avian schistosomes much less it is known about the diversity, geographical range and host associations of the marine representatives. Here, we provide novel data on the species diversity and host-parasite relationships of the marine schistosomes in respect to their intermediate gastropod host from the Persian Gulf. Methods: A total of 1,745 horn snails of Pirenella cingulata (Gmelin), were examined during a survey from December 2019 to February 2020 from eight distinct locations along the coast of Iran. Partial sequences of the mitochondrial cytochrome c oxidase subunit 1 (cox1) and the nuclear 28S rRNA gene were generated for the schistosome isolates recovered and used for molecular identification and phylogenetic reconstruction. Results: Our molecular analyses inferred from both molecular markers revealed presence of two schistosome species, Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912 and a putative new species of Austrobilharzia Johnston, 1917. Molecular elucidation of the life-cycle of O. canaliculata was achieved for the first time via matching novel and published sequence data from adult and larval stages. This is the first record of Ornithobilharzia from the Persian Gulf and globally the first record of this genus in a potamidid snail host.Conclusions: The present study provides new host and distribution records for major etiological agents of cercarial dermatitis and contributes important information on host-parasite relationships. Our study further highlights the importance of the molecular systematics in the assessment of schistosome diversity and calls for further surveys in order to reach a better understanding of the schistosome diversity and patterns of relationships among them, host associations, transmission strategies and distribution coverage.

show abstract

Section: Discussionmentioning

confidence: 99%

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Khosravi

Thieltges

Shamseddin

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…North America Penner (1950) [43] Planaxis sulcatus (Born) Kuwait: Kuwait Bay Abdul-Salam & Sreelatha (2004) [44] Anous minutus Boie North America: Hawaii Chu (1954) [19] Gavia immer (Brünnich) North America Kinsella and Forrester (1999) [45] Larus dominicanus Lichtenstein South Africa Appleton (1982,1986) [46] [47],…”

Section: Littorina Keenae Rosewatermentioning

confidence: 99%

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Khosravi

Thieltges

Shamseddin

et al. 2022

Preprint

View full text Add to dashboard Cite

Background Avian schistosomes comprise a diverse and widespread group of trematodes known for their surprising ability to switch into new hosts and habitats. Their cercariae are the causative agents of the waterborne allergic disease cercarial dermatitis. There are 13 recognised genera of avian schistosomes with majority of the extant species with freshwater-based life-cycles. Despite the considerable research attention on avian schistosomes much less it is known about the diversity, geographical range and host associations of the marine representatives. Here, we provide novel data on the species diversity and host-parasite relationships of the marine schistosomes in respect to their intermediate gastropod host from the Persian Gulf. Methods A total of 1,745 horn snails of Pirenella cingulata (Gmelin), were examined during a survey from December 2019 to February 2020 from eight distinct locations along the coast of Iran. Partial sequences of the mitochondrial cytochrome c oxidase subunit 1 (cox1) and the nuclear 28S rRNA gene were generated for the schistosome isolates recovered and used for molecular identification and phylogenetic reconstruction. Results Our molecular analyses inferred from both molecular markers revealed presence of two schistosome species, Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912 and a putative new species of Austrobilharzia Johnston, 1917. Molecular elucidation of the life-cycle of O. canaliculata was achieved for the first time via matching novel and published sequence data from adult and larval stages. This is the first record of Ornithobilharzia from the Persian Gulf and globally the first record of this genus in a potamidid snail host. Conclusions The present study provides new host and distribution records for major etiological agents of cercarial dermatitis and contributes important information on host-parasite relationships. Our study further highlights the importance of the molecular systematics in the assessment of schistosome diversity and calls for further surveys in order to reach a better understanding of the schistosome diversity and patterns of relationships among them, host associations, transmission strategies and distribution coverage.

show abstract

“…However, in South America, there are several taxa that host the larvae of avian schistosomes, such as Ampullariidae, Planorbidae, Physidae, Lymnaeidae, and Cochliopidae, although species of the family Chilinidae are the more frequently identified hosts for schistosomes (see [12]). Nevertheless, in South America, there is a concentration of data on avian schistosomiasis, including worms and human cases in Brazil and Argentina [4,[12][13][14][15], while for the remaining South American countries, there are only few mentions or a complete lack of information [4,12,16].…”

Section: Introductionmentioning

confidence: 99%

“…The systematics of Neotropical schistosomes is poorly understood both for freshwater and marine schistosomes [4,[12][13][14][15]17]. So far, five genera and seven species have been recorded in the Neotropics [4,12], although most correspond to older records with no molecular data.…”

Section: Introductionmentioning

confidence: 99%

Morphological, Behavioral, and Molecular Characterization of Avian Schistosomes (Digenea: Schistosomatidae) in the Native Snail Chilina dombeyana (Chilinidae) from Southern Chile

et al. 2022

View full text Add to dashboard Cite

Avian schistosomes are blood flukes parasitizing aquatic birds and snails, which are responsible for a zoonotic disease known as cercarial dermatitis, a hypersensitive reaction associated to the cutaneous penetration of furcocercariae. Despite its worldwide distribution, its knowledge is fragmentary in the Neotropics, with most of data coming from Argentina and Brazil. In Chile, there are only two mentions of these parasites from birds, and one human outbreak was associated to the genus “Trichobilharzia”. However, the identity of such parasites is pending. The aim of this study was to identify the furcocercariae of avian schistosomes from Southern Chile using an integrative approach. Thus, a total of 2283 freshwater snails from different families were collected from three different regions. All snails were stimulated for the shedding of furcocercariae, but only Chilina dombeyana (Chilinidae) from the Biobío region was found to be parasitized. The morphology and phylogenetic analyses of 28S and COI genes stated two lineages, different from Trichobilharzia, shared with Argentina. This study provides new information on Neotropical schistosomes, highlighting the need for major research on these neglected trematodes, which are considered to be emerging/re-emerging parasites in other parts of the globe as consequence of anthropogenic disturbances and climatic change. Highlights: 1. Two different lineages (Lineage I and II) were described and molecularly characterized (28S and COI genes); 2. Cercaria chilinae I y II are proposed as a synonymous of Lineage II. Thus, a total of four different lineages of avian schistosomes are related to Chilina spp.; 3. Chilina spp. represents an important intermediate host for avian schistosomes in South America, constituting a reservoir de schistosomes with zoonotic potential; 4. Coinfection between the two different lineages was found, a finding previously not reported for avian schistosomes; 5. Expansion in the geographic distribution of Nasusbilharzia melancorhypha from its original record in Argentina, with Chilina dombeyana as an additional intermediate host.

show abstract

Putative new genera and species of avian schistosomes potentially involved in human cercarial dermatitis in the Americas, Europe and Africa

Cited by 14 publications

References 33 publications

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Schistosomes from the Persian Gulf: phylogenetic relationships, host associations and life-cycle elucidation of Ornithobilharzia canaliculata (Rudolphi, 1819) Odhner, 1912

Morphological, Behavioral, and Molecular Characterization of Avian Schistosomes (Digenea: Schistosomatidae) in the Native Snail Chilina dombeyana (Chilinidae) from Southern Chile

Contact Info

Product

Resources

About