Morphology, biology and taxonomy ofDendritobilharzia loossiSkrjabin, 1924 (Trematoda: Bilharziellidae), a parasite ofPelecanus onocrotalus(Pelecanidae) andAnas plathyrinchos(Anatidae)

Akramova, F. D.; Azimov, D. A.; Shakarboev, E. B.

doi:10.1051/parasite/2011181039

Cited by 5 publications

(2 citation statements)

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“…are specific to a single snail species or a group of closely-related congeners (Kock, 2001;Rudolfova et al, 2005;Brant and Loker, 2009;Jouet et al, 2009), and experimental and genetic confirmation that a species of Trichobilharzia can infect multiple genera of snails within a family has yet to be achieved. There is a report of an avian schistosome Dendritobilhariza pulverulenta (Cheatum, 1941) found in both Gyraulus (North America, New Zealand) and Anisus (Europe) snails but the genetic identity of the worms from Anisus have not been confirmed as D. pulverulenta, since there exists more than one species (Khalifa, 1976;Vusse, 1980;Brant et al, 2011) and Dendritobilhariza loossi has been found experimentally to use Anisus vortex in Europe (Akramova et al, 2011). Snail surveys carried out in Europe (Rudolfova et al, 2005;Jouet et al, 2009b) and Africa (Appleton and Brackenbury, 1998;Laamrani et al, 2005), have failed to recover any Trichobilharzia spp.…”

Section: Discussionmentioning

confidence: 99%

Schistosomes with wings: how host phylogeny and ecology shape the global distribution of Trichobilharzia querquedulae (Schistosomatidae)

Ebbs

Loker

Davis

et al. 2016

International Journal for Parasitology

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Migratory waterfowl play an important role in the maintenance and spread of zoonotic diseases worldwide. An example is cercarial dermatitis, caused when larval stages of schistosomes that normally develop in birds penetrate human skin. Members of the genus Trichobilharzia (Schistosomatidae), transmitted mainly by ducks, are considered to be major etiological agents of cercarial dermatitis globally. To better understand the diversity and distribution of Trichobilharzia spp., we surveyed ducks from the United States, eastern Canada, Argentina, South Africa and New Zealand. To aid in species identification of the Trichobilharzia worms recovered, regions of the Cox1, ND4 and ITS1 were sequenced. Furthermore, we provide molecular phylogenetic evidence for the cosmopolitan distribution and trans-hemispheric gene flow for one species, Trichobilharzia querquedulae, previously thought to be restricted to North America. These new samples from endemic non-migratory duck species indicate that T. querquedulae transmission occurs within each of the regions we sampled and that it is specific to the blue-winged+silver teal duck clade. Prevalence within this host group is >95% across the known range of T. querquedulae, indicating that transmission is common. Genetic divergence is evenly distributed among continents, and no phylogenetic structure associated with geography was observed. The results provide strong support for the global distribution and transmission of T. querquedulae and represent, to our knowledge, the first report of a cosmopolitan schistosome confirmed by genetic data. These data are the first known to support trans-hemispheric genetic exchange in a species responsible for causing cercarial dermatitis, indicating that the epidemiology of this group of poorly known zoonotic parasites is more complex than previously expected.

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Section: Discussionmentioning

confidence: 99%

Schistosomes with wings: how host phylogeny and ecology shape the global distribution of Trichobilharzia querquedulae (Schistosomatidae)

Ebbs

Loker

Davis

et al. 2016

International Journal for Parasitology

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“…Long-term observations have shown that parthenitae of Schistosomatidae and Bilharziellidae representatives parasitize exclusively the hepatopancreatic gland of molluscs (Azimov, 1975(Azimov, , 1986Shakarboev, 2009;Akramova, 2011;Akramova et al, 2007Akramova et al, , 2010Akramova et al, a, b, 2011Horak et al, 2002). However, data on changes in the structural organization of the mollusc liver under the influence of parthenitae and cercariae of above mentioned trematodes are extremely fragmentary and insufficient.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Structure and Functions of Mollusc Organs Under the Effect of Orientobilharzia Turkestanica Larvae

Shakarbaev¹,

Mingbaev²,

Akramova³

et al. 2013

Vestnik Zoologii

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The paper presents results of the studies on alterations in the structure and functions of mollusc organs under the effect of the trematode Orientobilharzia turkestanica (Skrjabin, 1913) larvae. Destructive changes were observed along with a vast necrosis of the hepatopancreatic gland. Parasitism of O. turkestanica parthenitae and cercariae in L. auricularia causes deep histopathological changes in the tissues. Protein, carbohydrate and fat metabolism disorders result in the weakening of molluscs and loss of their lability, which is essential for adaptation to environmental changes. The latter is confirmed by a high mortality of infected individuals.

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Thermodynamics of egg production, development and hatching in trematodes

Morley

Lewis

2016

J. Helminthol.

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Temperature is a key factor influencing the rate of biological processes of ectothermic animals and is intrinsically linked to climate change. Trematode parasites may be potentially susceptible to temperature changes and, in order to develop a predictive framework of their response to climate change, large-scale analyses are needed. In particular, the biology of the egg of all species is at some time influenced by environmental conditions. The present study uses Arrhenius activation energy (E*), a common measure of temperature-mediated reaction rates, to analyse experimental data from the scientific literature on the effects of temperature on the production, development and hatching of trematode eggs. Egg production declines at high temperatures, with habitat-specific climatic factors determining the optimal thermal range. Egg development, as is typical of invertebrates, shows a simple response to temperature, with minimal differences between mid- (35-60°) and low-latitude (<35°) species. Egg hatching demonstrates variable thermodynamics with high E* values at low temperature ranges and thermostability at mid-temperatures, before declining at high temperature ranges, with wide thermostable zones being a common feature. Comparisons between development and hatching indicate that these two parameters demonstrate different thermodynamical responses. The significance of these results in furthering our understanding of trematode egg biology under natural conditions is discussed.

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Morphology, biology and taxonomy ofDendritobilharzia loossiSkrjabin, 1924 (Trematoda: Bilharziellidae), a parasite ofPelecanus onocrotalus(Pelecanidae) andAnas plathyrinchos(Anatidae)

Cited by 5 publications

References 9 publications

Schistosomes with wings: how host phylogeny and ecology shape the global distribution of Trichobilharzia querquedulae (Schistosomatidae)

Schistosomes with wings: how host phylogeny and ecology shape the global distribution of Trichobilharzia querquedulae (Schistosomatidae)

Changes in the Structure and Functions of Mollusc Organs Under the Effect of Orientobilharzia Turkestanica Larvae

Thermodynamics of egg production, development and hatching in trematodes

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