Observations upon some common cestode parasites of the wild rabbit, Oryctolagus cuniculus

Parasitology ◽  
1940 ◽  
Vol 32 (1) ◽  
pp. 78-90 ◽  
Author(s):  
W. M. R. Evans
Keyword(s):  
Intermediate Host ◽  
Oryctolagus Cuniculus ◽  
Wild Rabbit ◽  
Seasonal Fluctuations ◽  
Image Position ◽  
First Time

1. Between November 1936 and February 1937, ninety-six rabbits were examined, whilst between August 1937 and July 1938, 446 rabbits were examined for cestode parasites. The rabbits were obtained from the same area.2. The rabbits were infected with the following cestodes to the extent given, for the two periods respectively:3. Two species of the genus Hymenolepis are recorded for the first time from the rabbit, and they are briefly described.4. The seasonal fluctuations in the incidence of the above cestodes are discussed.5. The span of life of both Cittotaenia pectinata and C. denticulata is seen to be not greater than 10 months, and evidence is given to show that the intermediate host of C. denticulata is available between April and December, and that of C. pectinata from August to April.6. Evidence of host and age resistance is demonstrated in Cysticercus pisiformis.

The occurrence and abundance of helminth parasites of the mountain hare Lepus timidus (L.) and the wild rabbit Oryctolagus cuniculus (L.) in Aberdeenshire, Scotland

1986 ◽  
Vol 60 (2) ◽  
pp. 92-98 ◽  
Author(s):  
B. Boag ◽  
G. Iason
Keyword(s):  
Oryctolagus Cuniculus ◽  
Wild Rabbit ◽  
Helminth Parasites ◽  
Intestinal Helminths ◽  
British Isles ◽  
Cestode Species ◽  
Seasonal Fluctuations ◽  
Mountain Hare ◽  
Lepus Timidus ◽  
First Time

ABSTRACTMountain hares were collected each month between April 1984 and March 1985 and their intestines examined for helminths. 26 rabbits were also collected between Juny and December 1984 and examined for gastro-intestinal helminths. Three nematode and two cestode species were found in the hares while only two nematode and one cestode species were found in the rabbits. Trichostronglylus retortaeformis was recorded form 88% of the 193 hares and 92% of the rabbits While comparable figures for Passalurus ambiguus were 0·5% and 54% and for Mosgovoyia pectinata 14% and 81%. Seasonal fluctuations were observed in the T. retortaeformis populations in the hare; numbers tended to be low during the winter months and high throughout the summer. Paranoplocephala wimerosa was reported for the first time from the British Isles and Trichostrongylus axei was recorded for the forst time in the mountain hare.

Taenia spp.: 18S rDNA microsatellites for molecular systematic diagnosis

2005 ◽  
Vol 79 (2) ◽  
pp. 139-142 ◽  
Author(s):  
P. Foronda ◽  
J.C. Casanova ◽  
E. Martinez ◽  
B. Valladares ◽  
C. Feliu
Keyword(s):  
Canary Islands ◽  
18S Rdna ◽  
Oryctolagus Cuniculus ◽  
Wild Rabbit ◽  
Molecular Systematic ◽  
Rdna Gene ◽  
Larval Stages ◽  
First Time ◽  
18S Rdna Gene ◽  
Taenia Parva

AbstractThe 18S rDNA gene of adult worms of Taenia parva found in Genetta genetta in the Iberian Peninsula and larval stages of T. pisiformis from the wild rabbit (Oryctolagus cuniculus) in Tenerife (Canary Islands) were amplified and sequenced. The sequences of the 18S rDNA gene of T. parva (1768 bp) and T. pisiformis (1760 bp) are reported for the first time (GenBank accession nos. AJ555167–AJ555168 and AJ555169–AJ555170, respectively). In 168 alignment positions microsatellites in the 18S rDNA of both taxa were detected for the first time (TGC in T. parva and TGCT in T. pisiformis) and differences in their sequences with different repetition numbers were observed. The use of nucleotide sequences of this gene in the resolution of systematic problems in cestodes is discussed with reference to the systematic status of Taenia spp. and mainly in human taeniids such as T. solium, T. saginata, and Asian human isolates of Taenia.

The incidence of helminth parasites from the wild rabbit Oryctolagus cuniculus (L.) in Eastern Scotland

1985 ◽  
Vol 59 (1) ◽  
pp. 61-69 ◽  
Author(s):  
B. Boag
Keyword(s):  
Worm Burden ◽  
Oryctolagus Cuniculus ◽  
Fasciola Hepatica ◽  
Farm Animals ◽  
Wild Rabbit ◽  
Helminth Parasites ◽  
Seasonal Fluctuations ◽  
Reproductive State ◽  
Domesticated Animals ◽  
Female Rabbit

AbstractSamples of wild rabbits were collected each month over the six-year period 1977–82 and their intestines and abdomens examined for helminths. Three species of nematode, four of cestode and one trematode were found, Graphidium strigosum was recorded in 33% of the 786 rabbits, Trichostrongylus retortaeformis in 79%, Passalurus ambiguus in 14·2% Cittotaenia Pectinata in 37%, C. denticulata in 11%, Coenurus pisiformis in 3%, Cysticercus serialis in 0·1% and Fasciola hepatica in 0·1%. G. strigosum and P. ambiguus infections were greatest in the older heavier animals whereas juvenile rabbits had the heaviest T. retortaeformis nematode burdens. Seasonal fluctuations were observed in G. strigosum, T. retortaeformis, P. ambiguus and Cittotaenia denticulata. The sex and reproductive state of the female rabbit did not have any significant effect on either the nematode or cestode worm burdens. Myxomatosis was shown to significantly increase the worm burden of T. retortaeformis and raise that of P. ambiguus. No nematode or cestode from domesticated animals were recovered and it was concluded that since F. hepatica was found only once rabbits did not constitute a serious hazard to the farm animals grazing the area.

Helminth Parasites of the Wild Rabbit Oryctolagus cuniculus (L.) in North East England

1972 ◽  
Vol 46 (1) ◽  
pp. 73-79 ◽  
Author(s):  
B. Boag
Keyword(s):  
Infection Rate ◽  
Oryctolagus Cuniculus ◽  
Wild Rabbit ◽  
Helminth Parasites ◽  
Post Mortem ◽  
Discontinuous Distribution ◽  
North East ◽  
First Time

During the spring, summer and autumn of 1967, 1968 and 1969, 109 rabbits were collected from two localities in Northumberland. Post mortem worm counts indicated that six species of helminths were present, Trichostrongylus retortaeformis, Passalurus ambiguus, Strongyloides papillosus, Nematodirus battus, N. filicollis and Cittotaenia denticulata.T. retortaeformis was recovered from both localities, an overall infection rate of 88% being recorded.P. ambiguus and C. denticulata were found at only one of the localities which would indicate that these species have a locally discontinuous distribution and an explanation for this has been discussed.Both Nematodirus battus and N. filicollis which are normally sheep parasites were recorded for the first time from wild rabbits. The numbers of rabbits infected and size of infection were small and in consequence the rabbit can not be considered an important reservoir for these species.

On the Life Cycle of Spirocerca lupi: Preinfective Stages in the Intermediate Host

1972 ◽  
Vol 46 (2) ◽  
pp. 125-137 ◽  
Author(s):  
R. C. Chhabra ◽  
Kunwar Suresh Singh
Keyword(s):  
Life Cycle ◽  
Intermediate Host ◽  
Spirocerca Lupi ◽  
Second Stage ◽  
Stage 1 ◽  
First Time

The development of the preinfective stages of S. lupi has been described and illustrated and the details of morphology given for the first time.The sex of the first stage juveniles can be distinguished by locating the position of the genital primordium. On an average, the first stage juveniles measure 0·39 mm. in length and 0·036 mm. in breadth, early second stage 0·78 and 0·044 mm. and the advanced second stage 1·40 mm. and 0·63 mm. respectively. The second stage juveniles obtained from beetles were not infective to dogs.

scholarly journals PCR Detection of Toxoplasma gondii in European Wild Rabbit (Oryctolagus cuniculus) from Portugal

2020 ◽  
Vol 8 (12) ◽  
pp. 1926
Author(s):  
Catarina Coelho ◽  
Madalena Vieira-Pinto ◽  
Anabela Vilares ◽  
Maria João Gargaté ◽  
Manuela Rodrigues ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Oryctolagus Cuniculus ◽  
Wild Rabbit ◽  
Human Beings ◽  
Source Of Infection ◽  
Zoonotic Parasite ◽  
Central Portugal ◽  
Sag2 Gene ◽  
Rabbit Meat ◽  
Meat Samples

Wildlife plays an important role in the epidemiological cycle of Toxoplasma gondii. The European wild rabbit (Oryctolagus cuniculus) can be a source of infection to wild and domestic hosts, including human beings. Additionally, as an herbivorous animal, the European wild rabbit may also be a sentinel of environmental contamination with T. gondii and, consequently, an indicator of the potential transmission of this parasite. The purpose of the present work was to detect T. gondii DNA in European wild rabbit from central Portugal, as well as the possible implications for public health. Heart and diaphragm samples were obtained from 28 rabbits hunted in central Portugal. Nested PCR separately amplified the 5′ and 3′ ends of the surface antigen 2 (SAG2) gene. T. gondii DNA was detected in 19 out of the 28 sampled animals, resulting in a prevalence of 67.9%. These results show that T. gondii infection occurs in European wild rabbit and therefore may pose a potential risk for humans if consumed as raw or undercooked meat. Measures should be taken in order to prevent infection by this zoonotic parasite and for the conservation of wildlife. To the best of our knowledge, this is the first study performed by means of PCR on T. gondii in European wild rabbit meat samples.

New data on life cycles for three species of Fellodistomidae (Digenea) in the White Sea

2020 ◽  
Vol 94 ◽  
Author(s):  
D. Krupenko ◽  
A. Uryadova ◽  
A. Gonchar ◽  
G. Kremnev ◽  
V. Krapivin
Keyword(s):  
Intermediate Host ◽  
White Sea ◽  
Taxonomic Status ◽  
Life Cycles ◽  
The White Sea ◽  
Arctic Seas ◽  
Buccinum Undatum ◽  
The Family ◽  
Second Intermediate Host ◽  
First Time

Abstract Few digeneans of the family Fellodistomidae are known from the Russian Arctic seas. The taxonomic status of these species, their life cycles and host range raised recurrent questions, some of which remain unanswered. To revise the species composition and life cycles of fellodistomids in the White Sea, we searched for them in several known and suspected hosts: wolffish, flatfishes (definitive), gastropods of the family Buccinidae (second intermediate) and protobranch bivalves (first intermediate). Species identification was based both on morphology and 28S ribosomal RNA gene sequences. We found Fellodistomum agnotum in the White Sea for the first time. Buccinum undatum was proved to be intermediate host of both F. agnotum and Fellodistomum fellis, and metacercariae of F. fellis were registered from two more buccinid species: Buccinum scalariforme and Neptunea despecta. We also found metacercariae of F. agnotum and F. fellis producing eggs in the second intermediate host. Two fellodistomids were found in protobranch bivalves: sporocysts and cercariae of Steringophorus furciger in Nuculana pernula, and sporocysts with large furcocercous cercariae in Ennucula tenuis. The latter were identified as F. agnotum by molecular analysis; thus, the entire life cycle of this species was reconstructed.

Biharmonic functions and Brownian motion

1967 ◽  
Vol 4 (1) ◽  
pp. 130-136 ◽  
Author(s):  
L. L. Helms
Keyword(s):  
Brownian Motion ◽  
Boundary Conditions ◽  
Boundary Function ◽  
Normal Derivative ◽  
Dimensional Euclidean Space ◽  
Biharmonic Functions ◽  
Neumann Type ◽  
Bounded Open Subset ◽  
Image Position ◽  
First Time

Let R be a bounded open subset of N-dimensional Euclidean space EN,N ≧ 1, let {xt: t ≧ 0} be a separable Brownian motion starting at a point x ɛ R, and let τ = τR be the first time the motion hits the complement of R. It is known [1] that if g is a bounded measurable function on the boundary ∂R of R, then h(x) = Ex[g(xτ)] is a harmonic function of x ɛ R which “solves” the Dirichlet problem for the boundary function g; i.e., Δh = 0 on R, where Δ is the Laplacian. In elastic plate problems, one must solve the biharmonic equation subject to certain boundary conditions. For the more important applications, these boundary conditions involve the values of u and the normal derivative of u at points of ∂R. Even though a treatment of this Neumann type problem is not available at this time, some things can be said about biharmonic functions and their relationship to Brownian motion. We will show, in fact, that u(x)= Ex[τ(xτ)] is a biharmonic function on R which “satisfies” the boundary conditions (i) u=0 on ∂R and (ii) Δu= −2g on ∂R, provided g satisfies certain hypotheses. More generally, we will show that u(x)=Ex[Δkg(XΔ)] is polyharmonic of order k + 1 on R (i.e., Δk + 1u = Δ(Δku) = 0 on R) and that it satisfies certain boundary conditions. A treatment of the special case g ≡ 1 on ∂R can be found in [3].

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