| final hosts and variability of trichobilharzia regenti under natural conditions. | in europe, despite of intensive work on avian schistosomes in the past, only one representative of nasal schistosomes has been detected so far, trichobilharzia regenti, a species that remained undescribed to the scientific community until 1998. since then, however, t. regenti has gained a considerable attention, not only due to the induction of serious lesions concomitant with the migration of the schistosomulae through the central nervous system of their natural hosts (birds) but also due to th ... | 2010 | 20556426 |
| in vitro cultivation of early schistosomula of nasal and visceral bird schistosomes (trichobilharzia spp., schistosomatidae). | cercariae of bird schistosomes (trichobilharzia szidati and trichobilharzia regenti) were mechanically stimulated to transform to schistosomula and kept in different cultivation media supplemented with duck red blood cells and/or homogenized nervous tissue. the development under in vitro conditions was compared with that in vivo, using the following characters: emptying of penetration glands, surface changes, food uptake, and growth of early schistosomula. the results show that the cultivation m ... | 2009 | 19238442 |
| morphological features of the nasal blood fluke trichobilharzia regenti (schistosomatidae, digenea) from naturally infected hosts. | the first author detected the nasal bird schistosome trichobilharzia regenti in iceland in anas platyrhynchos in landmannalaugar in autumn of 2003. since then, measurements and morphological studies have been performed on fresh worms (fragments) obtained in the area from naturally infected ducks, a. platyrhynchos and aythya marila. in the present study, we compare our findings to the original description of t. regenti by horák et al. (parasite 5:349-357, 1998) that relies upon worms obtained by ... | 2011 | 22146993 |
| variations in immunofluorescent antibody response against trichobilharzia and schistosoma antigens in compatible and incompatible hosts. | schistosome cercariae are able to penetrate into the skin of various vertebrate hosts. however, in contrast to the compatible host, the infection of incompatible hosts results in the death of parasites at various intervals post-infection. in order to compare the immune responses in both types of host infected with trichobilharzia regenti, trichobilharzia szidatior schistosoma mansoni, antibody responses against various t. regenti, t. szidatiand s. mansonischistosome developmental stages were stu ... | 2002 | 12107473 |
| neurotropic behaviour of trichobilharzia regenti in ducks and mice. | the bird nasal schistosome trichobilharzia regenti is a new agent of cercarial dermatitis. cercariae are able to penetrate the skin of birds and mammals including man. the parasite then attacks the central nervous system. the present study has shown that schistosomula avoid penetration of blood capillaries and enter the peripheral nerves of the legs of mice and ducks as early as 1 day post-infection (p.i.) and 1.5 days p.i., respectively. these peripheral nerves are used as a route to the spinal ... | 2002 | 12015826 |
| phylogenetic analysis of nasal avian schistosomes (trichobilharzia) from aquatic birds in mazandaran province, northern iran. | nasal schistosomes are trematodes in the family schistosomatidae, many members of which are causative agents of human cercarial dermatitis (hcd). little is known about the species diversity and distribution of nasal dwelling schistosomes of water birds, particularly in countries outside of europe; even less is known in countries like iran. nasal schistosomes are of particular interest since these species migrate via the central nervous system to the nasal cavity once they penetrate their host. t ... | 2016 | 26631753 |
| antibody response of definitive hosts against antigens of two life stages of the neuropathogenic schistosome trichobilharzia regenti. | the nasal avian schistosome trichobilharzia regenti spends part of its intravertebrate period of life within the central nervous system. migration of the parasites can be accompanied by neuromotor disorders or paralysis in natural definitive hosts (ducks) and even in laboratory mammals. cercariae are also able to penetrate human skin and induce cercarial dermatitis. while the cellular and antibody responses against cercariae and migrating schistosomula have been investigated in mice, little is k ... | 2015 | 26216102 |
| terminal phase of bird schistosomiasis caused by trichobilharzia regenti (schistosomatidae) in ducks (anas platyrhynchos f. domestica). | the terminal phase of the migration of trichobilharzia regenti horák, kolárová et dvorák, 1998 in the definitive host (anas platyrhynchos f. domestica) was studied 12-27 days post infection (p.i.). brain meninges were the last part of the nervous system where the worms were detected before their occurrence in the nasal cavity. in meninges, the parasites started to feed on red blood cells. then the worms occurred in the nasal mucosa 14-25 days p.i. and the first immature eggs appeared 15 days p.i ... | 2007 | 17886739 |
| genetic variability among cercariae of the schistosomatidae (trematoda: digenea) causing swimmer's itch in europe. | ribosomal dna sequences of the internal transcribed spacer 1 (its1) were obtained from schistosome cercariae responsible for swimmer's itch in europe. two types of its1 (1100 and 1400), which differ by the number of repeated patterns were found among cercariae shedded by lymnaea ovata and l. auricularia (lymnaeidae). a phylogenetic analysis of the its1 region showed that sequences of each type form two well-defined clades. an adult of trichobilharzia regenti isolated from the nasal vessels of an ... | 2001 | 11584754 |
| avian schistosomes in french aquatic birds: a molecular approach. | the prevalence of human cercarial dermatitis (hcd) caused by bird schistosomes appears to be increasing in france, in light of the impact of tourism combined with high densities of wild aquatic hosts in freshwater areas. the present work expands our knowledge of schistosome systematics by including samples of bird schistosomes collected from their natural hosts in france. heads (318) and viscera (81) of aquatic birds belonging to 16 species from five orders, collecting during the hunting seasons ... | 2009 | 19356266 |
| histopathology of cns and nasal infections caused by trichobilharzia regenti in vertebrates. | in bird infections caused by trichobilharzia regenti, the central nervous system (cns) represents probably the main route to the nasal cavity, where maturation of the parasite occurs. however, in an abnormal mouse host, development is incomplete and is accompanied by a strong affinity of the parasite to the cns. in order to explain pathological changes caused by the parasite, a histological study of cross-sections from the cns and nasal cavity was performed. in the cns of duck and mouse, immatur ... | 2001 | 11511002 |
| trichobilharzia regenti n. sp. (schistosomatidae, bilharziellinae), a new nasal schistosome from europe. | members of the genus trichobilharzia are parasitic in visceral or nasal body parts of their avian hosts. the examination of water snails in south bohemia revealed a schistosome infection in radix peregra snails. the experimental infection of ducklings (anas platyrhynchos, cairina moschata) confirmed that a new trichobilharzia species--t. regenti n. sp.--was found. the adults, eggs and larvae (miracidia and cercariae) of the species were morphologically characterized. the adult occupy the nasal b ... | 1998 | 9879557 |
| trichobilharzia regenti, a pathogen of the avian and mammalian central nervous systems. | the development of nasal avian schistosomes of the genus trichobilharzia in their final host is poorly known. therefore, an experimental infection of ducklings (anas platyrhynchos f. dom.) by t. regenti was performed. the infection resulted in leg paralysis and orientation/balance disorders of birds. the examination of the duck's spinal cord and brain confirmed the presence of developing parasites in pre-patent as well as patent periods. the absence of the worms in other tissues strongly support ... | 1999 | 10633919 |