Helminth parasites of squirrels (Sciuridae) in Saskatchewan

1980 ◽  
Vol 58 (11) ◽  
pp. 2040-2050 ◽  
Author(s):  
Steven G. McGee
Keyword(s):  
Ground Squirrels ◽  
Tamiasciurus Hudsonicus ◽  
Glaucomys Sabrinus ◽  
Helminth Parasites ◽  
Spermophilus Tridecemlineatus ◽  
New Host ◽  
Marmota Monax ◽  
The Family ◽  
Spermophilus Franklinii ◽  
New Host Records

During the period March 1976 to November 1977, 377 mammals of the family Sciuridae (Rodentia) were collected in Saskatchewan and examined for helminths. Species and numbers of each were as follows: Spermophilus richardsonii (Sabine), 209; Spermophilus franklinii (Sabine), 46; Spermophilus tridecemlineatus (Mitchill), 31; Tamiasciurus hudsonicus (A. H. Howell), 64; Glaucomys sabrinus (Shaw), 12; Eutamias minimus (J. A. Allen), 11; and Marmota monax (Erxleben), 4.Ten species of cestodes, 2 species of trematodes, 11 species of nematodes, and 1 acanthocephalan were represented in the collections made. New host records and (or) geographic range extensions were indicated for 10 species of helminths.In addition to taxonomic considerations of the helminths, attention has been given to parasite–host relationships involving ground squirrels. In general, male Spermophilus spp. were significantly more commonly infected than were females, and older squirrels were significantly more commonly infected than were younger ones. However, adult squirrels did not have significantly more worms than did juveniles.

STUDIES ON THE BIOLOGY OF TAENIA CRASSICEPS (ZEDER, 1800) RUDOLPHI, 1810 (CESTODA)

1962 ◽  
Vol 40 (6) ◽  
pp. 969-990 ◽  
Author(s):  
Reino S. Freeman
Keyword(s):  
Initial Rate ◽  
Subsequent Development ◽  
Microtus Pennsylvanicus ◽  
Tamiasciurus Hudsonicus ◽  
Sciurus Carolinensis ◽  
New Host ◽  
Tamias Striatus ◽  
Taenia Crassiceps ◽  
Marmota Monax ◽  
New Host Records

Taenia crassiceps was common in Vulpes fulva examined from southern Ontario. Metacestodes occurred naturally in Microtus pennsylvanicus, Marmota monax, Tamias striatus, and Ondatra zibethicus, and Peromyscus maniculatus, Tamiasciurus hudsonicus, and Sciurus carolinensis were infected experimentally; all rodents are new host records. Cysticerci developed into adults in dogs or foxes within 5 to 6 weeks; five coyote pups resisted infection. Development of the metacestode was followed mainly in white mice. Infections were most common subcutaneously, but also occurred in both body cavities. Mice approximately 4 weeks of age were most susceptible. Asexual reproduction occurred by exogenous, and rarely endogenous, budding from the abscolex pole beginning approximately 3 weeks after infection. Metacestodes in various stages of development were injected into mice subcutaneously, intrapleurally, but mainly intraperitoneally. Subsequent development and reproduction were similar to that following infection with eggs. Apparently all metacestodes are capable of budding. The initial rate of reproduction was higher subcutaneously and intrapleurally than intraperitoneally, but within approximately 100 days the rate became higher and continued higher intraperitoneally than elsewhere. Reproduction never reached a logarithmic rate. Metacestodes inoculated serially up to 21 times at 50-day intervals increased greatly in size and continued budding. Four other series were maintained by serial subinoculation at 50-day intervals through 23 generations without a significant change in the rate of reproduction.

Checklist of helminth parasites of threatened vertebrate species from Brazil

Zootaxa ◽  
2009 ◽  
Vol 2123 (1) ◽  
pp. 1-45 ◽  
Author(s):  
LUÍS C. MUNIZ-PEREIRA ◽  
FABIANO M. VIEIRA ◽  
JOSÉ L. LUQUE
Keyword(s):  
Host Species ◽  
Helminth Species ◽  
Helminth Parasites ◽  
Vertebrate Species ◽  
Helminthological Collection ◽  
New Host ◽  
Unpublished Information ◽  
New Host Records

Using available records, unpublished information retrieved from the Helminthological Collection of the Oswaldo Cruz Institute (CHIOC) and published reports, a checklist of the recorded helminth parasites of endangered vertebrates from Brazil was generated. A total of 772 records and 186 helminth species (6 Acanthocephala, 83 Nematoda, 23 Cestoda, 64 Trematoda, 10 Monogenea) in 76 host species (7 Actinopterygii, 8 Chondrichthyes, 1 Amphibia, 10 Reptilia, 22 Aves, 28 Mammalia) from Brazil were listed in the present work, including 39 undetermined helminth species and 10 new host records. This is the first compilation of the helminth parasites of threatened vertebrates in Brazil and in the Neotropics.

Structure of the cephalic end of two little-known oxyuroid genera, Travnema Pereira, 1938 and Cosmoxynemoides Travassos, 1949, parasites of fishes, as revealed by SEM

1994 ◽  
Vol 68 (4) ◽  
pp. 319-322 ◽  
Author(s):  
F. Moravec ◽  
A. Kohn ◽  
B.M.M. Fernandes
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Type Species ◽  
Freshwater Fishes ◽  
The Other ◽  
New Host ◽  
The Family ◽  
Cephalic Extremity ◽  
New Host Records ◽  
Scanning Electron

AbstractThe cephalic end of the type species of pharyngodonid genera Travnema and Cosmoxynemoides, T. travnema Pereira, 1938 and C. aguirrei Travassos, 1949, parasites of Brazilian freshwater fishes, was studied by scanning electron microscopy. The mouth aperture of Travnema was found to be circular, surrounded by four cephalic papillae and two lateral amphids and the cuticle of the cephalic end had a conspicuous dense sculpture. On the other hand, the mouth aperture of Cosmoxynemoides was triangular, surrounded by three lip-like elevations covering the whole surface of the relatively flat cephalic extremity, each with two inner lobes separated one from another by a short groove; the lip-like elevations bore four medium-sized, kidney-shaped cephalic papillae and two minute amphids (two papillae on the dorsal elevation and one papilla and one amphid on each of two ventrolateral elevations); the cuticle of the cephalic end was smooth. Both species were noted for the absence of oral lamellae and the presence of lateral alae. Both genera are listed in the family Pharyngodonidae but Travnema (and also Hakynema), due to its morphological peculiarities, is considered to represent a distinct subfamily Travnematinae within the Pharyngodonidae. The finding of both T. travnema and C. aguirrei in the characid fish Astyanax bimaculatus lacustris represents new host records.

Helminth Parasites of Anurans from Zaria, Northern Guinea Savannah Zone of Nigeria

2020 ◽  
Vol 41 (2) ◽  
Author(s):  
E.U Anele ◽  
I.H Nock ◽  
I.M.K Gadzama
Keyword(s):  
Small Intestine ◽  
Infection Intensity ◽  
Parasite Prevalence ◽  
Xenopus Tropicalis ◽  
Helminth Parasites ◽  
Infestation Level ◽  
New Host ◽  
The Difference ◽  
Savannah Zone ◽  
New Host Records

Helminth parasitc infections were investigated in 150 Anurans collected in parts of the Northern Guinea Savannah during thedry and wet seasons of 2016. The Anurans that were investigated included Amietophrynus regularis, Kassina senegalensis,Afrixalus vittiger, Xenopus tropicalis, Xenopus fischbergi, Pyxiecephalus cf. edulis, Hoplobatrachus occipitalis, Amniranagalamensis and Ptychadena pumilio. Overall prevalence of helminth parasites was 64% (94/150). Seven species ofhelminths belonging to three taxonomic classes were recovered: Monogenea 4%, Trematoda 19.33% and Nematoda 40.67%were identified. Eupolystoma alluaudi (30%) was the only monogenean recorded from the bladder of S. regularis. Tematodesfound were Diplodischus fishthalicus (53.49%) and Haematoloechus micrurus (67.45%) from the rectum and lungs of H.occipitalis, respectively. Nematodes included Camallanus microcephalus from the oesophagus and small intestine of X.fischbergi ( 62.96%) and X. tropicalis (100 %), respectively, Camallanus dimitrovi (25.58%) from the small intestine andrectum of H. occipitalis, an unidentified nematode from the oesophagus and small intestine of X. fischbergi (1.85%) and X.tropicalis (33.33%), and an Aplectana (85.00%%) species from the small intestine and rectum of S. regularis. Except forEupolystoma alluaudi, the infestation level was generally low. Parasite prevalence was higher during the wet (39.33%) thandry (24.67%) season and the difference was not significant (p = 0.17). The prevalence and infection intensity were lower thanthose reported from anurans in southern biotopes of Nigeria. The occurrence of Camallanus macrocephalus is a new recordfor Nigeria, while X. fischbergi and X. tropicalis are new host records for C. macrocephalus. Keywords: Anurans, helminth, prevalence, Northern Guinea Savannah, Nigeria

LIFE HISTORY STUDIES ON TAENIA MUSTELAE GMELIN, 1790 AND THE TAXONOMY OF CERTAIN TAENIOID CESTODES FROM MUSTELIDAE

1956 ◽  
Vol 34 (4) ◽  
pp. 219-242 ◽  
Author(s):  
Reino S. Freeman
Keyword(s):  
Life History ◽  
Natural Infection ◽  
Host Record ◽  
Pine Marten ◽  
Host Reaction ◽  
New Host ◽  
Tamias Striatus ◽  
Marmota Monax ◽  
New Host Record ◽  
New Host Records

Taenia mustelae Gmelin, 1790 (= T. tenuicollis Rudolphi, 1819) is proposed as the valid name for the small-hooked cestode from European brown weasel, and Taenia martis (Zeder, 1803) n. comb. (= T. intermedia Rudolphi, 1810) is proposed for the large-hooked cestode from European marten. T. mustelae adults were found naturally in the short-tailed weasel, Mustela erminea, and T. martis adults in the pine marten, Martes americana in North America; the latter constitutes a new host record. Larvae were recovered from 10 species of rodents of which Citellus franklinii, Eutamias minimus, Marmota monax, Tamias striatus, Synaptomys cooperi, and Zapus hudsonius are new host records. Experimental infections produced by feeding T. mustelae eggs were followed in eight species of rodents. In one animal mature scoleces occurred as early as 26 days after eggs were fed, yet no fully developed scoleces were present even after 104 days in another animal in the same feeding. Such feedings of eggs produced multiscolex larvae (up to 26 scoleces), or multiscolex and uniscolex larvae simultaneously, but never uniscolex larvae exclusively, although these were found occasionally in nature. Normal, fully developed scoleces were present on larvae 318 days old. Growth of T. mustelae larvae in Peromyscus maniculatus and the host reaction is described in detail. Multiscolex larvae from a natural infection fed to a mink produced adult T. mustelae.

Seasonal dynamics and distribution of American dog tick, Dermacentor variabilis (Say), larvae and nymphs at Birds Hill Park, Manitoba

1985 ◽  
Vol 63 (12) ◽  
pp. 2748-2755 ◽  
Author(s):  
V. I. Burachynsky ◽  
T. D. Galloway
Keyword(s):  
Dermacentor Variabilis ◽  
Microtus Pennsylvanicus ◽  
Tamiasciurus Hudsonicus ◽  
Clethrionomys Gapperi ◽  
Spermophilus Tridecemlineatus ◽  
Mammal Species ◽  
Tamias Striatus ◽  
Sorex Cinereus ◽  
Spermophilus Franklinii ◽  
Dog Tick

During a 2-year study on the relationships between immature Dermacentor variabilis and their small-mammal hosts near Birds Hill, Manitoba, 739 captures of 427 mammals were examined for ticks. Captures represented 11 mammal species: Clethrionomys gapperi, Lepus americanus, Microtus pennsylvanicus, Mus musculus, Peromyscus maniculatus, Sorex cinereus, Spermophilus franklinii, Spermophilus tridecemlineatus, Tamias striatus, Tamiasciurus hudsonicus, and Zapus hudsonius. Clethrionomys gapperi, M. pennsylvanicus, P. maniculatus, S. franklinii, and Z. hudsonius were most frequently encountered and, with the exception of S. franklinii, infested with larvae and nymphs. Clethrionomys gapperi were most frequently infested by D. variabilis and produced 42.6% and 60.5% of larvae collected in 1979 and 1980, respectively, and over 85% of all nymphs. Peak larval infestation occurred between the last week of May and the middle of June; that for nymphs occurred in July in both 1979 and 1980. Dermacentor variabilis appeared to have a 2-year life cycle in Manitoba. Larvae were spatially aggregated during both years and aggregates were located in different areas of the plots each year. Nymphs were less aggregated than larvae. The distribution of nymphs overlapped that of larvae each year and occupied a greater area on the plots.

scholarly journals Cestoda, Bothriocephalidae, Bothriocephalus acheilognathi Yamaguti, 1934; Nematoda, Rhabdochonidae, Rhabdochona canadensis Moravec and Arai, 1971: new records for the state of Puebla, Mexico, and a new fish host

Check List ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 437 ◽  
Author(s):  
Rogelio Aguilar-Aguilar ◽  
Alexis José-Abrego ◽  
Gerardo Pérez-Ponce de León
Keyword(s):  
New Records ◽  
Fish Host ◽  
Cyprinid Fish ◽  
The State ◽  
Helminth Fauna ◽  
Helminth Species ◽  
Helminth Parasites ◽  
New Host ◽  
Bothriocephalus Acheilognathi ◽  
New Host Records

In order to contribute to the knowledge on helminth parasites of freshwater fishes in Mexico, the helminth fauna of the cyprinid fish Notropis moralesi was studied. The helminth species Bothriocephalus acheilognathi and Rhabdochona canadensis were recovered from 20 examined hosts. Values of prevalence, abundance and mean intensity of each infection are provided. Present work represents the first helminthological study for N. moralesi. Therefore, both helminth species recorded are new host records. This is the second report of B. acheilognathi and the first of R. canadensis for the state of Puebla.

scholarly journals Helminth parasites of Thomomys bulbivorus (Richardson) (Rodentia: Geomyidae), with the description of a new species of Hymenolepis (Cestoda)

1985 ◽  
Vol 63 (6) ◽  
pp. 1463-1469 ◽  
Author(s):  
Scott Lyell Gardner
Keyword(s):  
New Species ◽  
Helminth Parasites ◽  
Pocket Gopher ◽  
Willamette Valley ◽  
Additional Species ◽  
New Host ◽  
Pocket Gophers ◽  
Significant Change ◽  
A New Species ◽  
New Host Records

A cestode, Hymenolepis tualatinensis n. sp., is described from the pocket gopher, Thomomys bulbivorus (Richardson) (Rodentia: Geomyidae), from the Willamette Valley in Oregon. Helminths of four additional species were found. Trichuris fossor Hall, 1916, Ransomus rodentorum Hall, 1916, Heligmosomoides thomomyos Gardner and Jasmer, 1983, and Hymenolepis horrida (von Linstow, 1901), of which all but H. thomomyos represent new host records. A significant change in prevalence of the whipworm T. fossor in the population of T. bulbivorus from spring through summer was noted. Significant differences in prevalence of infection of helminths in pocket gophers collected from two different localities in the Willamette Valley were observed.

Helminth Parasites of the Gunner,Tautogolabrus adspersus(Walbaum) in Newfoundland

1970 ◽  
Vol 44 (2) ◽  
pp. 169-188 ◽  
Author(s):  
Chandra Sekhar S. ◽  
William Threlfall
Keyword(s):  
Fish Species ◽  
Host Species ◽  
Helminth Parasites ◽  
Tautogolabrus Adspersus ◽  
New Host ◽  
Metazoan Parasites ◽  
Negative Results ◽  
Close Proximity ◽  
Species Being ◽  
New Host Records

808 cunners,Tautogolabrus adspersus(Walbaum) were obtained from eight sampling stations around the Newfoundland coast, during the periods August-September, 19G7 and July-October, 1908. The fish were examined for metazoan parasites using conventional parasitological techniques. 22 species of parasites (10 trematode; 5 cestode; 6 nematode; 1 acanthocephalan) were recovered. This number excludes metacercariae ofCryptocotyle lingua(Creplin, 1825). 19 are new host records. Details of infections with the various species are given, each species being discussed and/or described individually. No leeches were found on this host despite the fact that it lives in. close proximity to other fish species that are heavily infested and an experiment performed to determine if leeches would move from one host species to another gave negative results.

Helminth parasites of the Newfoundland short-finned squid, Illex illecebrosus illecebrosus (LeSueur) (Cephalopoda: Decapoda)

1968 ◽  
Vol 46 (5) ◽  
pp. 1059-1070 ◽  
Author(s):  
Elizabeth L. Brown ◽  
William Threlfall
Keyword(s):  
Species Level ◽  
The Body ◽  
The Other ◽  
Helminth Parasites ◽  
New Host ◽  
First Time ◽  
New Host Records

Five genera of cestode parasites were found in the short-finned squid. Representatives of three of these, Pelichnibothrium speciosum, Monticelli, Scolex polymorphus Rudolphi, and Nybelinia sp. are new host records. The other two genera are Phyllobothrium and Dinobothrium, both of which have previously been described from Illex illecebrosus illecebrosus. The specimens of Dinobothrium collected were identified to the species level, Dinobothrium plicitum Linton, for the first time. Contrary to conclusions drawn by other workers, the plerocercoids of Phyllobothrium sp. do not wander freely about the body of the squid in nature, but are restricted to the caecum. The wandering of plerocercoids referred to above is probably a function of rising temperature over the period between time of capture of the squid and time of examination.

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