Nasal schistosomiasis in Mute Swans in Switzerland

Palmer, Donald F.; Ossent, Pete

doi:10.5962/bhl.part.81576

Cited by 13 publications

(8 citation statements)

References 11 publications

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“…is a new European schistosom e sp ecies; it cannot be confused with the sympatrically occurring species T. o c e lla ta (LaValette, 1855) Brumpt, 1931, T. s z id a ti Neuhaus, 1952 and T. f r a n k i Müller & Kimmig, 1994. O ne report on T ricb o b ilh a rz ia sp. in nasal cavity of mute sw ans from Switzerland has b een published (Palmer & Ossent, 1984). However, the report is centred mainly on histopathological evaluation; it lacks a deeper morphological characterization and species des cription as well as detail data on the parasite life cycle.…”

Section: Discussion Smentioning

confidence: 99%

“…T h e y w e re re p o rte d fo r th e first tim e b y F ain (1955a,b,c, 1956a,b, 1959) in Rwanda, Africa. Later, the parasites w ere found in India (Lalitha & Alvar, 1960), Australia (Bearup, 1957;Blair & Ottesen, 1979;Blair & Islam, 1983;Islam, 1986a) and Switzerland (Palmer & Ossent, 1984). Until now, seven species o f nasal Tri c h o b ilh a r z ia w ere described (Table I).…”

Section: T He Genus T R Ic H O B Ilh a R Z Ia Comprising O F Aboutmentioning

confidence: 99%

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Trichobilharzia regentin. sp. (Schistosomatidae, Bilharziellinae), a new nasal schistosome from Europe

1998

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Tr ic h o b il h a r z ia r e g e n t i n . s p . (S c h is t o s o m a t id a e, B ilh a r z ie llin a e ),A NEW NASAL SCHISTOSOME FROM EUROPE HORÁK P.*, KOLÁŘOVÁ L.** & DVOŘÁK J.* Summary :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 adults occupy the nasal blood vessels where they lay the eggs; the miracidia hatch from the eggs directly in the tissue and leave the host during drinking/feeding of the infected birds. KEY W ORDS :Trichobilharzia, Schistosomatidae, nasal schistosome, life cycle, Radix. R é s u m é : Tr ic h o b il h a r z ia r e g e n t i

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Section: Discussion Smentioning

confidence: 99%

Section: T He Genus T R Ic H O B Ilh a R Z Ia Comprising O F Aboutmentioning

confidence: 99%

Trichobilharzia regentin. sp. (Schistosomatidae, Bilharziellinae), a new nasal schistosome from Europe

1998

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“…The information on natural infections caused by Trichobilharzia in Europe is rare and in cases of nasal infections only two reports are known from mute swans and ducks in Switzerland and France, respectively (Palmer and Ossent 1984;Picard and Jousson 2001). Therefore, the aim of our work was to examine selected water birds for nasal schistosomes, perform infection experiments with laboratory snails and verify their subsequent development in domestic ducks.…”

Section: Introductionmentioning

confidence: 99%

Nasal schistosomes of wildfowl in the Czech Republic

Rudolfová

Sitko

Horák

2002

Parasitology Research

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In Central Europe, the adults of nasal bird schistosomes of the genus Trichobilharzia have only been reported from experimental infections. Our work confirmed a relatively high prevalence of these parasites in wild anatid birds in the Czech Republic. The isolated miracidia were used to infect the Radix peregra (an autochtonous snail species) which proved to be a susceptible intermediate host. Subsequently, the emerged cercariae penetrated the skin of domestic ducks and adults were found in the nasal mucosa. It can be concluded that nasal bird schistosomes occur in the Czech fauna and are able to complete their life cycle under the conditions found in Central Europe.

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“…The work of Fain (1956) contains a brief note referring to natural infection of the bird nasal cavity; and the report by Palmer and Ossent (1984) describes granulomatous rhinitis of mute swans as the main pathological ®nding caused by an undetermined nasal Trichobilharzia. The absence of histopathological data is partly due to the fact that, except for T. regenti (HoraÂ k et al 1999) and partly T. arcuata (Islam 1986), there is no information on the migration of nasal schistosomes through the host body.…”

Section: Discussionmentioning

confidence: 99%

Histopathology of CNS and nasal infections caused by Trichobilharzia regenti in vertebrates

Kolářová

Horák

Cada

2001

Parasitology Research

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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, immature flukes were found. Cross-sections showed parasites located either in meninges or in matter of various parts of the spinal cord and brain. In the spinal cord, the submeningeal location led to a strong inflammatory reaction around the schistosomula and resulted in eosinophilic meningitis. In the white and gray matter of the spinal cord and in the white matter of the brain, a cellular infiltration of spongy tissue surrounded the immature parasites; and we observed dystrophic and necrotic changes of neurons, perivascular eosinophilic inflammation in the spinal cord and brain, and cell infiltration around the central canal of the spinal cord. T. regenti adults and eggs were detected in the nasal mucosa of infected ducklings; and aging of the eggs resulted in various host reactions, ranging from focal accumulation of cells to the formation of granulomas. Histopathological changes may explain symptoms described previously for prepatent and patent phases of infections caused by T. regenti, i.e., neuromotor abnormalities in birds and mammals and hemorrhages/petechiae in birds, respectively.

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Nasal schistosomiasis in Mute Swans in Switzerland

Cited by 13 publications

References 11 publications

Trichobilharzia regentin. sp. (Schistosomatidae, Bilharziellinae), a new nasal schistosome from Europe

Trichobilharzia regentin. sp. (Schistosomatidae, Bilharziellinae), a new nasal schistosome from Europe

Nasal schistosomes of wildfowl in the Czech Republic

Histopathology of CNS and nasal infections caused by Trichobilharzia regenti in vertebrates

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