THE HELMINTH PARASITES OF SLEDGE-DOGS IN NORTHERN CANADA AND NEWFOUNDLAND

1940 ◽  
Vol 18d (9) ◽  
pp. 325-332 ◽  
Author(s):  
Thomas W. M. Cameron ◽  
I. W. Parnell ◽  
L. L. Lyster
Keyword(s):  
North America ◽  
Liver Fluke ◽  
Helminth Parasites ◽  
Northern Canada ◽  
First Time

In a survey, based on examination of faeces and viscera of sledge dogs, the following were identified: hookworms, ascarids, whipworms, kidney worms, fish-carried and other tapeworms, the Canadian liver-fluke and other trematodes and an acanthocephalid. The distribution of the infections is noted. The acanthocephalid, Corynosoma semerme, is recorded for the first time from North America.

Northern Canadian mayflies (Insecta; Ephemeroptera), records and descriptions

1981 ◽  
Vol 59 (9) ◽  
pp. 1784-1789 ◽  
Author(s):  
Françoise Harper ◽  
P. P. Harper
Keyword(s):  
North America ◽  
Boreal Forest ◽  
Limited Extent ◽  
James Bay ◽  
Northern Canada ◽  
Tolerant Species ◽  
Northern Regions ◽  
First Time

Sixty-eight species are recorded from the northern regions, tundra and open boreal forest, of Canada. The Eurasian Ephemerella mucronata (Bengtsson) is reported for the first time from North America and Caenis Candida n.sp. is described from the James Bay drainage in Quebec. The mayfly fauna of Northern Canada is composed of a distinctive tundra element (five species, three of which are holarctic), a north boreal element containing a few characteristic but not exclusive species, together with the most tolerant species of the eastern and, to a limited extent, western temperate faunas. Eighty-two species are now reported from Canada north of the closed boreal forest, roughly one fourth of the known Canadian fauna of mayflies.

A new species and taxonomic notes on northern Nearctic Cerodontha (Icteromyza) (Diptera: Agromyzidae)

2008 ◽  
Vol 140 (5) ◽  
pp. 557-562 ◽  
Author(s):  
Stéphanie Boucher
Keyword(s):  
New Species ◽  
North America ◽  
Yukon Territory ◽  
Palaearctic Species ◽  
Northern Canada ◽  
First Time ◽  
A New Species

AbstractCerodontha (Icteromyza) pilosan. sp. is described from the Yukon Territory. The Palaearctic species C. (I.) lineella (Zetterstedt) is recorded for the first time in North America, based on specimens from northern Canada and Alaska, and C. (I.) pollinosa (Melander) is synonymized with C. lineella. Cerodontha pilosa is most similar to C. (I.) longipennis (Loew) and C. (I.) lineella. Distinguishing characters and a modification of Spencer’s key to Canadian species of Cerodontha are given to separate these species.

Thecate Hydroids from the Shelf Waters of Northern Canada

1970 ◽  
Vol 27 (9) ◽  
pp. 1501-1547 ◽  
Author(s):  
Dale R. Calder
Keyword(s):  
North America ◽  
New Records ◽  
High Arctic ◽  
Common Species ◽  
Hudson Bay ◽  
Northern Canada ◽  
Foxe Basin ◽  
First Time

Based largely on collections from the Calanus–Salvelinus expeditions, 54 species of thecate hydroids were identified from the shelf waters of northern Canada between northeastern Newfoundland and the Alaska–Yukon border. Common species included Halecium muricatum, Calycella syringa, Campanularia integra, C. speciosa, C. volubilis, Gonothyraea loveni, Filellum serpens, Lafoea gracillima, Sertularella polyzonias, S. tricuspidata, Sertularia schmidti, and S. similis. Halecium groenlandicum, H. scutum, Cuspidella procumbens, Calycella gracilis, and Sertularia schmidti are new records for North America; Ptychogena lactea is previously known from this continent only as the medusa. Twenty-two species are reported in northern Canada for the first time, bringing to 71 the number of thecate species recorded from the region. Nearly half of the 71 species recorded are circumpolar in distribution, and over two-thirds transgress both arctic and subarctic zones.Most samples had a paucity of hydroids, particularly those from the high arctic. Collection records indicate that the most favourable regions for hydroids in northern Canada are the Strait of Belle Isle, eastern Ungava Bay, eastern Hudson Strait, northern and southeastern Hudson Bay, Foxe Channel, and northern Foxe Basin.

The Cultivation of “Culture” in the Moroccan Amazigh Movement

2009 ◽  
Vol 43 (2) ◽  
pp. 168-177 ◽  
Author(s):  
Paul Silverstein
Keyword(s):  
North America ◽  
North Africa ◽  
Northern Africa ◽  
The Other ◽  
Northern Canada ◽  
The World ◽  
Different Cultures ◽  
First Time

In the opening sequence of a 2008 documentary, Ni Sauvage, Ni Barbare (Neither Savage Nor Barbaric), co-produced by Québecois and Moroccan television, the director Roger Cantin introduces his subjects over images of art, ritual, and nature that alternate between northern Canada and northern Africa: Fouad Lahbib is a painter from Morocco. He is Berber, he is Amazigh, he is an autochthon from North Africa. Florent Valiant is a singer from Quebec. He is Innu, he is Amerindian, he is an autochthon from North America. At first glance, they come from completely different cultures. Their ancestral lands are far apart, separated by an ocean; they don’t look at all alike. One people travels by rivers and through immense forests. The other lives with heat and drought. What do these two men, Fouad Lahbib and Florent Vallant, have in common? They belong to marginalized cultures whose extinction was precipitated, whose assimilation was desired, and whose language and customs were silenced. Were they really savages and barbarians? Or simply people who approach the world with a spirit of harmony, sharing, and solidarity? Meeting each other for the first time, Fouad Lahbib and Florent Vallant will learn with us how much all men are alike, wherever they may live.

scholarly journals The making of oncology: Helminthology as the cornerstone

2017 ◽  
Vol 17 (2) ◽  
pp. 78-93
Author(s):  
K. Lalchhandama
Keyword(s):  
Bladder Cancer ◽  
Bile Duct ◽  
Nobel Prize ◽  
Schistosoma Haematobium ◽  
Liver Fluke ◽  
Clonorchis Sinensis ◽  
International Agency ◽  
Helminth Parasites ◽  
First Time ◽  
Group 1

Cancer is multifaceted and multifarious disease. The diversity of cancer is complicated by so many types of carcinogens. Remarkably, helminth parasites are among the first well-established cancer agents. It started with the celebrated discovery of a roundworm Gongylonema neoplasticum (more famously, but wrongly, as Spiroptera carcinoma) by Johannes Fibiger, only to show that Nobel Prize selection can be a fallible operation. After almost a century of scepticism, it is now conceded that helminths, other than G. neoplasticum, are truly carcinogenic. For the first time in history, the International Agency for Research on Cancer finally proclaimed in 2009 that three flukes, Schistosoma haematobium (urinary blood fluke), Clonorchis sinensis (Chinese liver fluke), and Opisthorchis viverrini (Southeast Asian liver fluke) are Group 1, i.e. fully proven, carcinogens. The first is the leading cause of bladder cancer, while the latter two are of that of the bile duct (cholangiocarcinoma). This is the story of how they came to be.

NORTH AMERICAN SPECIES OF CHRYSOMYXA

1950 ◽  
Vol 28c (3) ◽  
pp. 318-330 ◽  
Author(s):  
D. B. O. Savile
Keyword(s):  
North America ◽  
North American ◽  
Growing Season ◽  
North American Species ◽  
Northern Canada ◽  
First Time ◽  
Short Growing Season

The adaptation of the genus Chrysomyxa to a short growing season is discussed. Keys are given to the aecial and to the uredinial or telial stages of species that occur in North America. Range extensions are given, particularly for northern Canada. C. Rhododendri, newly reported in North America, and C. Cassandrae are shown to be barely distinguishable from C. Ledi and are made varieties of it. C. Woronini is reported for the first time in North America.

Effects of insecticides on adults and eggs of Drosophila suzukii (Diptera, Drosophilidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 208 ◽  
Author(s):  
Daniele Cristine Hoffmann Schlesener ◽  
Jutiane Wollmann ◽  
Juliano De Bastos Pazini ◽  
Anderson Dionei Grützmacher ◽  
Flávio Roberto Mello Garcia
Keyword(s):  
North America ◽  
South America ◽  
Chemical Control ◽  
Stone Fruits ◽  
Drosophila Suzukii ◽  
Ovicidal Effect ◽  
Mere Presence ◽  
South Of Brazil ◽  
Different Cultures ◽  
First Time

Drosophila suzukii (Diptera, Drosophilidae) is an exotic species, endemic to Asia and currently a pest to small and stone fruits in several countries of North America and Europe. It was detected in 2013 for the first time in South America, in the south of Brazil. Unlike most drosophilids, this species deserves special attention, because the females are capable of oviposit inside healthy fruits, rendering their sale and export prohibited. Despite the confirmed existence of this species in different states of Brazil, this insect is yet been to be given the pest status. Nevertheless, the mere presence of this species is enough to cause concern to producers of small fruits and to justify further investigation for it’s control, especially chemical control for a possible change in status. Therefore, the goal of this work was to evaluate, in laboratory, mortality of D. suzukii adults and ovicidal effect when exposed to different insecticides registered for species of the Tephritidae and Agromyzidae families in different cultures. The insecticides deltamethrin, dimethoate, spinosad, fenitrothion, phosmet, malathion, methidathion, and zeta-cypermethrin resulted in mortality to 100 % of the subjects three days after the treatment (DAT). Regarding the effects over eggs, it was  established that the insecticides fenitrothion, malathion, and methidathion deemed 100 % of the eggs not viable, followed by phosmet and diflubenzuron, which also caused elevated reduction in the eclosion of larvae two DAT.

scholarly journals Recognition Pattern of the Fasciola hepatica Excretome/Secretome during the Course of an Experimental Infection in Sheep by 2D Immunoproteomics

Pathogens ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 725
Author(s):  
David Becerro-Recio ◽  
Javier González-Miguel ◽  
Alberto Ucero ◽  
Javier Sotillo ◽  
Álvaro Martínez-Moreno ◽  
...  
Keyword(s):  
Experimental Infection ◽  
Fasciola Hepatica ◽  
Cathepsin L ◽  
Helminth Parasites ◽  
Glutathione S Transferase ◽  
Serum Samples ◽  
Secretory Products ◽  
Immunogenic Proteins ◽  
Host Parasite ◽  
First Time

Excretory/secretory products released by helminth parasites have been widely studied for their diagnostic utility, immunomodulatory properties, as well as for their use as vaccines. Due to their location at the host/parasite interface, the characterization of parasite secretions is important to unravel the molecular interactions governing the relationships between helminth parasites and their hosts. In this study, the excretory/secretory products from adult worms of the trematode Fasciola hepatica (FhES) were employed in a combination of two-dimensional electrophoresis, immunoblot and mass spectrometry, to analyze the immune response elicited in sheep during the course of an experimental infection. Ten different immunogenic proteins from FhES recognized by serum samples from infected sheep at 4, 8, and/or 12 weeks post-infection were identified. Among these, different isoforms of cathepsin L and B, peroxiredoxin, calmodulin, or glutathione S-transferase were recognized from the beginning to the end of the experimental infection, suggesting their potential role as immunomodulatory antigens. Furthermore, four FhES proteins (C2H2-type domain-containing protein, ferritin, superoxide dismutase, and globin-3) were identified for the first time as non-immunogenic proteins. These results may help to further understand host/parasite relationships in fasciolosis, and to identify potential diagnostic molecules and drug target candidates of F. hepatica.

Implications for the age of South African Devonian rocks in which Tropidoleptus (Brachiopoda) has been found

1983 ◽  
Vol 120 (1) ◽  
pp. 51-58 ◽  
Author(s):  
A. J. Boucot ◽  
C. H. C. Brunton ◽  
J. N. Theron
Keyword(s):  
South Africa ◽  
North America ◽  
South African ◽  
Early Carboniferous ◽  
Fossil Plants ◽  
Geological Time ◽  
Marine Sedimentation ◽  
History Of ◽  
Near Shore ◽  
First Time

SummaryThe Devonian brachiopod Tropidoleptus is recognized for the first time in South Africa. It is present in the lower part of the Witteberg Group at four widely separated localities. Data regarding the stratigraphical range of the genus elsewhere, combined with information on recently described fossil plants and vertebrates from underlying strata of the upper Bokkeveld Group, suggest that a Frasnian or even Givetian age is reasonable for the lower part of the Witteberg Group. The recognition of Tropidoleptus in a shallow water, near-shore, molluscan association, at the top of the South African marine Devonian sequence, is similar to its occurrence in Bolivia, and suggests a common Malvinokaffric Realm history of shallowing, prior to later Devonian or early Carboniferous non-marine sedimentation. It is noteworthy that Tropidoleptus is now known to occur in ecologically suitable environments around the Atlantic, but is absent from these same environments in Asia and Australia. Tropidoleptus is an excellent example of dispersal in geological time — first appearing in northern Europe and Nova Scotia, then elsewhere in eastern North America and North Africa, followed by South America and South Africa, while continuing in North America.

CHAETOCNEMA CONCINNA (MARSHAM, 1802), A EUROPEAN FLEA BEETLE INTRODUCED IN NORTH AMERICA (COLEOPTERA: CHRYSOMELIDAE: ALTICINAE)

1990 ◽  
Vol 122 (4) ◽  
pp. 647-650
Author(s):  
Laurent Lesage
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Prince Edward Island ◽  
Host Plants ◽  
Flea Beetle ◽  
Collection Data ◽  
First Time

AbstractChaetocnema concinna (Marsham, 1802), a European flea beetle, is reported for the first time from Canada. Preliminary collection data indicate that it may feed on the same host plants as in Europe. It has been collected to date in Prince Edward Island, Nova Scotia, and Maine.

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