It is uncertain when the head collar and collar spines of Isthmiophora hortensis (Digenea: Echinostomatidae), a zoonotic echinostome species in Far Eastern Asia, develop during its larval stages. In this study, the appearance of the head collar and collar spines was studied using light and scanning electron microscopy in cercariae and metacercariae experimentally obtained from freshwater snails (Lymnaea pervia) and tadpoles (Rana nigromaculata), respectively. The cercariae were shed from the snail on day 30 after exposure to laboratory-hatched miracidia. Metacercariae were obtained from the experimental tadpoles at 3, 6, 12, 15, 20, 24, 26, and 30 h after exposure to the cercariae. The head collar was already visible in the cercarial stage, although its degree of development was weak. However, collar spines did not appear in the cercarial stage and even in the early metacercarial stage less than 24 h postinfection in tadpoles. Collar spines became visible in the metacercariae when they grew older than 24 h. It was concluded that the head collar of I. hortensis developed early in the cercarial stage, but the development of collar spines did not occur until the worms became 24-h-old metacercariae in our experimental setting. Counting the number of collar spines was concluded as an unfeasible diagnostic method for I. hortensis cercariae when they are shed from the snail host.
The tegumental ultrastructure of juvenile and adult Himasthla alincia (Digenea: Echinostomatidae) was observed by scanning electron microscopy. One-, 5- (juveniles) and 20-day-old worms (adults) were harvested from chicks experimentally fed metacercariae from a bivalve, Mactra veneriformis. The juvenile worms were elongated and curved ventrally. The head crown bore 31 collar spines, arranged in a single row. The lip of the oral sucker had 12 paired, and 3 single type I sensory papillae, and the ventral sucker had about 25 type II sensory papillae. The anterolateral surface between the two suckers was densely packed with tegumental spines with 4-7 pointed tips. The adult worms were more elongated and filamentous, and had severe transverse folds over the whole body surface. On the head crown and two suckers, type I and II sensory papillae were more densely distributed than in the juvenile worms. Retractile brush-like spines, with 8-10 digits, were seen on the anterolateral surface, whereas claw-shaped spines, with 2-5 digits, were sparsely distributed posteriorly to the ventral sucker. The cirrus characteristically protruded out, and was armed with small spines distally. The surface ultrastructure of H. alincia was shown to be unique among echinostomes, especially in the digitation of its tegumental spines, the distribution of sensory papillae and by severe folds of the tegument.
Citations
Citations to this article as recorded by
Surface ultrastructure of the adult and juvenile stages of the trematode Astiotrema impletum (Looss, 1899) Looss 1900 (incertae sedis) from the Nile puffer, Tetraodon lineatus Linnaeus, 1758 S. G. Abd El-Kareem, M. H. Ibraheem Helminthologia.2021; 58(2): 188. CrossRef
Intestinal Flukes Recovered from a Herring Gull, Larus argentatus, in the Republic of Korea Young-Il Lee, Min Seo, Jong-Yil Chai The Korean Journal of Parasitology.2020; 58(1): 81. CrossRef
Tegumental ultrastructure of adult Quinqueserialis quinqueserialis (Trematoda: Notocotylidae): an intestinal parasite of muskrat (Ondatra zibethicus) Soraya Naem, Ashleigh B. Smythe Parasitology Research.2015; 114(7): 2473. CrossRef
Three Echinostome Species from Wild Birds in the Republic of Korea Seongjun Choe, Dongmin Lee, Hansol Park, Mihyeon Oh, Hyeong-Kyu Jeon, Youngsun Lee, Ki-Jeong Na, Youngjun Kim, Hang Lee, Keeseon S. Eom The Korean Journal of Parasitology.2014; 52(5): 513. CrossRef
Topography and ultrastructure of the tegument of Aphallus tubarium (Rodolphi, 1819) Poche, 1926 (Digenea: Cryptogonimidae), intestinal parasite of the common Dentex dentex (Linnaeus 1758) from Valinco Gulf Laetitia Antonelli, Yann Quilichini, Jos?phine Foata, Bernard Marchand Acta Parasitologica.2014;[Epub] CrossRef
Echinostoma macrorchis in Lao PDR: Metacercariae in Cipangopaludina Snails and Adults from Experimentally Infected Animals Woon-Mok Sohn, Jong-Yil Chai, Byoung-Kuk Na, Tai-Soon Yong, Keeseon S. Eom, Hansol Park, Duk-Young Min, Han-Jong Rim The Korean Journal of Parasitology.2013; 51(2): 191. CrossRef
Topography and ultrastructure of the tegument of Deropristis inflata Molin, 1859 (Digenea: Deropristidae), a parasite of the European eel Anguilla anguilla (Osteichthyes: Anguillidae) Jean-José Filippi, Yann Quilichini, Bernard Marchand Parasitology Research.2013; 112(2): 517. CrossRef
Topography and ultrastructure of the tegument of Lecithochirium musculus (digenea: Hemiuridae), a parasite of the European eel Anguilla anguilla (osteichthyes: Anguillidae) Jean‐José Filippi, Yann Quilichini, Joséphine Foata, Bernard Marchand Journal of Morphology.2012; 273(4): 361. CrossRef
Surface Ultrastructure of Juvenile and Adult Acanthoparyphium tyosenense (Digenea: Echinostomatidae) Eun-Taek Han, Moon-Seok Choi, Sung-Yil Choi, Jong-Yil Chai Journal of Parasitology.2011; 97(6): 1049. CrossRef
Topography and Ultrastructure of the Tegument of Bucephalus anguillae (Digenea: Bucephalidae), a Parasite of the European Eel Anguilla anguilla (Osteichthyen: Anguillidae) Jean-José Filippi, Yann Quilichini, Joséphine Foata, Bernard Marchand Journal of Parasitology.2010; 96(6): 1102. CrossRef
Echinostoma caproni: Differential tegumental responses to growth in compatible and less compatible hosts Javier Sotillo, Alan Trudgett, Liam Halferty, Antonio Marcilla, J. Guillermo Esteban, Rafael Toledo Experimental Parasitology.2010; 125(3): 304. CrossRef
Centrocestus formosanus (Digenea: Heterophyidae) Encysted in the Freshwater Fish, Puntius brevis, from Lao PDR Eun-Taek Han, Eun-Hee Shin, Souvanny Phommakorn, Bounthong Sengvilaykham, Jae-Lip Kim, Han-Jong Rim, Jong-Yil Chai The Korean Journal of Parasitology.2008; 46(1): 49. CrossRef
Mactra veneriformis, an Intertidal Clam, as a New Second Intermediate Host for Acanthoparyphium marilae (Digenea: Echinostomatidae) Eun-Taek Han, Jong-Yil Chai The Korean Journal of Parasitology.2008; 46(2): 101. CrossRef
FIRST RECORD AND DESCRIPTION OF METACERCARIAE OF CURTUTERIA ARGUINAE N. SP. (DIGENEA: ECHINOSTOMATIDAE), PARASITE OF COCKLES CERASTODERMA EDULE (MOLLUSCA: BIVALVIA) IN ARCACHON BAY, FRANCE Céline Desclaux, Fernanda Russell-Pinto, Xavier de Montaudouin, Guy Bachelet Journal of Parasitology.2006; 92(3): 578. CrossRef
First
Prev
