Studies on the helminth parasites of bats in Egypt and the factors influencing their occurrence with particular reference to digenetic trematodes

1976 ◽  
Vol 51 (1) ◽  
pp. 37-47 ◽  
Author(s):  
M. F. A. Saoud ◽  
M. M. Ramadan
Keyword(s):  
Helminth Parasites ◽  
Factors Influencing ◽  
Digenetic Trematodes

Helminth parasites of the fourspine stickleback (Apeltes quadracus (Mitchill)) in Newfoundland

1970 ◽  
Vol 48 (2) ◽  
pp. 404-406 ◽  
Author(s):  
George Hanek ◽  
William Threlfall
Keyword(s):  
Helminth Parasites ◽  
Digenetic Trematodes ◽  
Apeltes Quadracus ◽  
Cystidicola Farionis ◽  
Fourspine Stickleback

Fifteen specimens of the fourspine stickleback, Apeltes quadracus (Mitchill), caught in Salmonier Arm, near Mitchells Brook, St. Mary's Bay, Newfoundland, were examined for helminth parasites. Three species of monogenetic trematodes (Gyrodactylus avalonia Hanek and Threlfall, 1969; Gyrodactylus cameroni n. sp.; Gyrodactylus canadensis Hanek and Threlfall, 1969), one of digenetic trematodes (Podocotyle atomon (Rudolphi, 1802)), one of Cestoda (Proteocephalus sp.), and one of Nematoda (Cystidicola farionis Fischer, 1798) were recovered.

Helminth parasite communities of kangaroos and wallabies (Macropus spp. and Wallabia bicolor) from north and central Queensland

1998 ◽  
Vol 46 (5) ◽  
pp. 473 ◽  
Author(s):  
I. Beveridge ◽  
N. B. Chilton ◽  
P. M. Johnson ◽  
L. R. Smales ◽  
R. Speare ◽  
...  
Keyword(s):  
Host Species ◽  
Helminth Species ◽  
Helminth Parasites ◽  
Parasite Communities ◽  
Gastrointestinal Helminth ◽  
Helminth Communities ◽  
Digenetic Trematodes ◽  
Single Host ◽  
Wallabia Bicolor ◽  
High Level

The occurrence of gastrointestinal helminth parasites in 40 Macropus agilis, 12 M. antilopinus, 39 M. dorsalis, 28 M. giganteus, 29 M. parryi, 30 M. robustus and 26 Wallabia bicolor from north and central Queensland was examined. A total of 124 morphologically defined species of helminth was encountered, comprising 103 species of strongyloid nematodes, 6 species of trichostrongyloid nematodes, 2 species of spiruroid nematodes, 4 species of oxyuroid nematodes, 7 species of anoplocephalid cestodes and 2 species of digenetic trematodes. Helminth communities in each macropodid host species exhibited a high level of diversity, and were dominated numerically by strongyloid nematodes. A high proportion of the helminth species was restricted to a single host species and there was a low level of similarity between helminth communities in different host species. Similarities that did occur were not apparently related to the phylogenetic relationships between hosts and are best explained by host switching between hosts sharing overlapping habitats and feeding preferences. There was poor separation of the helminth species into ‘core’, ‘secondary’ and ‘satellite’ members of communities.

On Some Nematodes from the Freshwater Fishes of Ghana with the Description of a New Species, Spironoura petrei n.sp

1970 ◽  
Vol 44 (1) ◽  
pp. 63-68 ◽  
Author(s):  
L. F. Khalil
Keyword(s):  
New Species ◽  
Freshwater Fishes ◽  
Helminth Parasites ◽  
Research Project ◽  
Previous Record ◽  
Volta Basin ◽  
Digenetic Trematodes ◽  
The University ◽  
University Of Ghana ◽  
A New Species

Mr. T Petre of the Volta Basin Research Project of the University of Ghana kindly entrusted the writer with some nematodes collected from the freshwater fishes of Ghana. As far as can be found from published literature there is no previous record of nematodes from the freshwater fishes of Ghana. In fact, the helminth parasites of the freshwater fishes of this country are inadequately known and only monogeneans, digenetic trematodes and a single acanthocephalan have so far been reported. This collection represents 3 different species of nematodes from various hosts, one of which is new to science and is named after Mr. Petre to whom I am most grateful

Helminth parasitic infections of leaf litter frogs (Arthroleptis and Phrynobatrachus spp.) from cocoa plantations in southern Nigeria

2020 ◽  
Vol 41 (1) ◽  
pp. 93-100
Author(s):  
O. Edo-Taiwo ◽  
M.S.O. Aisien
Keyword(s):  
Leaf Litter ◽  
Infection Intensity ◽  
Nematode Species ◽  
Parasitic Infections ◽  
Helminth Parasites ◽  
Inhibitory Effects ◽  
Digenetic Trematodes ◽  
High Species Richness ◽  
Edo State ◽  
The Village

The endohelminths parasitizing leaf litter frogs (LLFs) at Ojo Camp, Ugboke, Ovia South West Local Government Area of Edo State, Nigeria were investigated. The frogs were collected from cocoa plantations (CPs) exposed to pesticides and from the village settlement (VS) located outside the pesticide use environment, for 15 months, using the Visual Acoustic Encounter Surveys method and disturbance searches. Two genera of LLFs were encountered: Arthroleptis (A. poecilonotus, A. variabilis, and six other undetermined Arthroleptis spp.) and Phrynobatrachus (P. auritus, P. plicatus, P. natalensis and Phrynobatrachus sp.). The overall prevalence of infection in LLFs from the CPs and VS were 37.4% and 50.0%, respectively but thedifference was not significant (p>0.05). The most parasitized LLF in the CPs was the unidentified Phrynobatrachus sp. (64.7%); in the VS infections were only recorded in A. poecilonotus (50%, n=4) and the single specimens of Arthroleptis sp. 2 collected from this habitat. The helminth parasites recovered included four cestodes (two adults: Cylindrotaenia jaegerskioeldi and Ophiotaenia sp.) and two larvae (two unidentified Proteocephalus spp.), three digenetic trematodes (two unidentified Mesocoelium spp. and a strigeoid larva) and eight nematode species (Amplicaecum sp.,  Aplectana sp., Cosmocerca ornata, Cosmocerca sp., Foleyellides sp., Physaloptera sp., Rhabdias sp. and an Ascaridida sp.). Although the cocoa plantations had very high species richness and diversity of parasites (15 parasite species), the intensity of infection was low. This generally low infection intensity reflects the inhibitory effects of the pesticide-contaminated environment of the CPs on parasite larval development and  transmission. Keywords: Leaf litter frogs; helminth parasites; prevalence; intensity; cocoa plantations; pesticides.

scholarly journals Intrinsic Factors Influencing the Infection by Helminth Parasites in Horses under an Oceanic Climate Area (NW Spain)

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
I. Francisco ◽  
M. Arias ◽  
F. J. Cortiñas ◽  
R. Francisco ◽  
E. Mochales ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Gastrointestinal Nematode ◽  
Helminth Parasites ◽  
Nw Spain ◽  
Intrinsic Factors ◽  
Factors Influencing ◽  
Oceanic Climate ◽  
Faecal Samples ◽  
Age And Sex

A coprological survey to determine the influence of some intrinsic factors (breed, age, and sex) on the infection by helminth parasites in equine livestock (n=418) under an oceanic climate area (NW Spain) was conducted. Faecal samples were individually collected and analyzed by the coprological techniques. The main strongylid genera identified wereTrichonemaandCyalocephalusspp (small strongyles) andStrongylusandTriodontophorus(large strongyles). The prevalence of gastrointestinal nematode was 89% (95% CI 86, 92) and 1% cestoda (0, 2). The percentage of horses with strongyloid parasites was 89% (86, 92), 11% (8, 14) forParascaris, and 3% (1, 5) forOxyuris. The highest prevalence for ascariosis was observed in the youngest horses (<3 years), for oxyurosis in the >10 years animals, and for strongylosis in the 3–10 years ones. Females were significantly more parasitized than males. A negative correlation between the age and the egg-excretion of ascarids and strongyles was recorded. The autochthonous and the English Pure Blood horses were the most parasitized. We concluded that the infections by helminths, especially the strongyloids, are significantly common in the region, so that greater importance should be given to this situation.

Factors influencing adhesive bonding at the bone/implant interface

1992 ◽  
Vol 50 (2) ◽  
pp. 1114-1115
Author(s):  
Julie A. Martini ◽  
Robert H. Doremus
Keyword(s):  
Electron Microscopy ◽  
Adhesive Bonding ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Bone Implant ◽  
Factors Influencing ◽  
Lr White ◽  
Transmission Electron ◽  
New Zealand White Rabbits ◽  
Scanning Electron

Tracy and Doremus have demonstrated chemical bonding between bone and hydroxylapatite with transmission electron microscopy. Now researchers ponder how to improve upon this bond in turn improving the life expectancy and biocompatibility of implantable orthopedic devices.This report focuses on a study of the- chemical influences on the interfacial integrity and strength. Pure hydroxylapatite (HAP), magnesium doped HAP, strontium doped HAP, bioglass and medical grade titanium cylinders were implanted into the tibial cortices of New Zealand white rabbits. After 12 weeks, the implants were retrieved for a scanning electron microscopy study coupled with energy dispersive spectroscopy.Following sacrifice and careful retrieval, the samples were dehydrated through a graduated series starting with 50% ethanol and continuing through 60, 70, 80, 90, 95, and 100% ethanol over a period of two days. The samples were embedded in LR White. Again a graduated series was used with solutions of 50, 75 and 100% LR White diluted in ethanol.

Factors Influencing Electrophysiologic Responsivity in Normal Adults

1965 ◽  
Vol 8 (4) ◽  
pp. 323-347
Author(s):  
Robert Goldstein ◽  
Benjamin RosenblÜt
Keyword(s):  
Conditioned Stimulus ◽  
White Light ◽  
Pure Tone ◽  
Alpha Rhythm ◽  
White Women ◽  
White Men ◽  
Inverse Relation ◽  
Factors Influencing ◽  
Electrodermal Responses ◽  
Normal Adults

Electrodermal and electroencephalic responsivity to sound and to light was studied in 96 normal-hearing adults in three separate sessions. The subjects were subdivided into equal groups of white men, white women, colored men, and colored women. A 1 000 cps pure tone was the conditioned stimulus in two sessions and white light was used in a third session. Heat was the unconditioned stimulus in all sessions. Previously, an inverse relation had been found in white men between the prominence of alpha rhythm in the EEG and the ease with which electrodermal responses could be elicited. This relation did not hold true for white women. The main purpose of the present study was to answer the following questions: (1) are the previous findings on white subjects applicable to colored subjects? (2) are subjects who are most (or least) responsive electrophysiologically on one day equally responsive (or unresponsive) on another day? and (3) are subjects who are most (or least) responsive to sound equally responsive (or unresponsive) to light? In general, each question was answered affirmatively. Other factors influencing responsivity were also studied.

Factors Influencing Pressure in the Portal Vein as Studied in the Intact Animal

1950 ◽  
Vol 16 (1) ◽  
pp. 194-210 ◽  
Author(s):  
Frederick W. Hoffbauer ◽  
Jesse L. Bollman ◽  
John L. Grindlay
Keyword(s):  
Portal Vein ◽  
Intact Animal ◽  
Factors Influencing
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