scholarly journals On the Helminth Fauna of the Muskrat (Ondatra zibethicus (Linnaeus, 1766)) in the Barnim District of Brandenburg State/Germany

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2444
Author(s):  
Rolf K. Schuster ◽  
Peter Specht ◽  
Siegfried Rieger
Keyword(s):  
Flood Control ◽  
Age Groups ◽  
The Other ◽  
Intermediate Hosts ◽  
Opisthorchis Felineus ◽  
Larval Stages ◽  
Burrowing Activity ◽  
Fur Animals ◽  
First Time ◽  
Plagiorchis Elegans

The muskrat is a neozoon species that has occupied many countries of continental North Europe after its introduction from north America as fur animals. Due to its burrowing activity it damages river and canal banks and structures of flood control. For this reason, the eradication of this alien species is recommended. Muskrats are also of parasitological interest since they can act as suitable intermediate hosts for Echinococcus multilocularis. On the other hand, little is known on the other helminths that infect muskrats. A total of 130 muskrats of different age groups trapped in different habitats in the Barnim district of the Brandenburg state by a professional hunter were examined for parasites and seven trematodes (Echinostoma sp., Notocotylus noyeri, Plagiorchis elegans, Plagiorchis arvicolae, Psilosostoma simillimum, P. spiculigerum, Opisthorchis felineus and four larval cestode species (Hydatigera taeniaeformis, Taenia martis, Taenia polyacantha, Taenia crassiceps) were detected. Larval stages of E. multilocularis were not found. O. felineus was found for the first time in muskrats in Germany. All the named parasites were present in Europe prior to the introduction of muskrats. With a prevalence of 48.9%, Strobilocercus fasciolaris, the larval stage of the cat tapeworm, H. taeniaeformis, was the most frequent parasite found in adult muskrats.

Extra-mammalian larval stages of Elaphostrongylus alces (Nematoda: Protostrongylidae), a parasite of moose (Alces alces) in Fennoscandia

1998 ◽  
Vol 76 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Murray W Lankester ◽  
Ing-Marie C Olsson ◽  
Margareta Stéen ◽  
Alvin A Gajadhar
Keyword(s):  
Long Range ◽  
Alces Alces ◽  
The Other ◽  
Intermediate Hosts ◽  
Larval Stages ◽  
Third Stage ◽  
The Mean ◽  
First Time

Dimensions and illustrations of the first-, second-, and third-stage larvae of Elaphostrongylus alces are presented for the first time. First-stage larvae were 417 ± 16 µm long (mean ± SD) (range 377-445 µm) and similar in size to those of E. cervi (420 ± 13 µm long; range 392-445 µm) and E. rangiferi, the other recognized members of the genus. The mean length of third-stage E. alces larvae (714 ± 23 µm long; range 675-756 µm) recovered from gastropod intermediate hosts was significantly less than that of E. cervi (831 ± 78 µm long; range 669-954 µm) and E. rangiferi, providing further evidence of the distinct status of E. alces, a recently described species from moose in Fennoscandia.

Larval development of Petrolisthes tuberculatus (Guérin, 1835) (Decapoda, Anomura, Porcellanidae) reared in laboratory

Zootaxa ◽  
2019 ◽  
Vol 4623 (2) ◽  
pp. 364-380
Author(s):  
MARIA EUGENIA GONZALEZ-CANALES ◽  
JOSE A. CUESTA ◽  
JUAN IGNACIO GONZÁLEZ-GORDILLO
Keyword(s):  
Larval Development ◽  
The Other ◽  
Larval Stages ◽  
First Time

The complete larval development of Petrolisthes tuberculatus (including two zoeal stages and the megalopa) is described and illustrated in detail for the first time, based on laboratory-reared material. In order to allow the differentiation of specimens from plankton samples, the larval stages of P. tuberculatus are compared with those known for other porcellanid crabs from Chilean waters (Allopetrolisthes angulosus, Petrolisthes granulosus, P. laevigatus and P. violaceus). As expected, this comparison lead to the inclusion of P. tuberculatus within the “sección Porcellanina” together with the other Chilean species of porcellanids. 

Larval development of ovine Neostrongylus linearis in four experimentally infected mollusc species

1994 ◽  
Vol 68 (3) ◽  
pp. 207-210 ◽  
Author(s):  
M.Y. Manga-González ◽  
M.P. Morrondo-Pelayo
Keyword(s):  
Post Infection ◽  
The Other ◽  
Snail Species ◽  
Intermediate Hosts ◽  
Cepaea Nemoralis ◽  
In Series ◽  
Mollusc Species ◽  
Higher Temperature ◽  
The One ◽  
First Time

AbstractDevelopment of Neostrongylus linearis larvae was studied in the snail intermediate hosts Oestophora (Oestophora) barbula, Oestophorella buvinieri, Cepaea nemoralis and Helix (Cryptomphalus) aspersa. The molluscs of each species, all adults, were divided into groups of 40 for infection purposes. The infection doses for the first two snail species were 90 and 50 first stage larvae (L1) of N. linearis, respectively. For C. nemoralis two batches were tested: one with 200 L1 kept at 19°C and the other with 250 L1 at a temperature of 21°C. The same was done with Helix (C.) aspersa with 200 L1 at a temperature of 21°C, on the one hand and 300 L1 at 24°C on the other. One or two molluscs of each species were killed in series from the 6th day post-infection (p.i.) until the 44th. Percentage values for total larvae (1, 2 and 3) and L3 were higher with the lower dose for C. nemoralis, whilst the same was true with the higher dose in Helix (C.) aspersa. In both cases, the higher temperature appeared to contribute to cycle acceleration. Using one way analysis of variance, statistically significant differences were detected between the species of molluscs tested concerning percentages of L1 which penetrated, total larvae and L3. According to our results, the decreasing order of susceptibility of these species of molluscs as experimental intermediate hosts of N. linearis is: O. buvinieri, Oestophora (O.) barbula, C. nemoralis and Helix (C.) aspersa. It is the first time that Oestophora (O.) barbula and Oestophorella buvinieri have been named as experimental intermediate hosts of N. linearis.

On the Structure and Life-histories of British Fresh-water Larval Trematodes

Parasitology ◽  
1929 ◽  
Vol 21 (1-2) ◽  
pp. 189-219 ◽  
Author(s):  
W. F. Harper
Keyword(s):  
Fresh Water ◽  
Life Histories ◽  
The Other ◽  
Trematode Species ◽  
Intermediate Hosts ◽  
Double Infection ◽  
Activity Duration ◽  
Large Numbers ◽  
Limnaea Stagnalis ◽  
First Time

A large number of fresh-water Invertebrates has been examined and the parasites obtained from them include examples of the commoner groups to be met with in any area surveyed. Six larval Trematodes have been described in detail, and by means of direct animal experiment two of them have been definitely related to known adults. Of these two one is the larva of Notocotylus seineti Fuhr., and is doubtfully Cercaria monostomi v. Linst., while the other is the larva of Echinoparyphium recurvatum v. Linst., and is described here in detail for the first time. The four xiphidiocercariae described are new. Data relating to the activity, duration of free life, and process of encystment of cercariae within the bodies of secondary intermediate hosts is also given.Effect of the parasite on the host. The disruption of the tissues brought about by the presence of sporocysts or rediae in the liver of a mollusc injures the host, and in many cases brings about its death. The gonads also are often attacked and completely destroyed. This latter feature of parasitic castration has been observed by Giard (1888) among certain species of Limnaea, Planorbis and Paludina attacked by sporocysts. Brown (1926) states that the gonads are rarely infected. As regards the encysted stages of cercariae these appear to do very little harm to their hosts even when present in large numbers. These observations are in agreement with those of Lebour (1912) for the sporocyst, rediae, and encysted stages of marine Trematodes.Double infection. I have found no instance of a double infection among the species described. In the literature, several records show the parasitism of two or more species of cercariae, within one and the same host. The occurrence of two species is most commonly met with, and as a rule one is in predominance. Sewell (1922) states that double infection is not common in India. Faust (1917), on the other hand, has found as many as four trematode species within the same host individual (Planorbis trivolis). Hesse (1923) states that “every large Limnaea peregra examined was heavily infected with sporocysts of either of the two species, but it was rare to find both together.” Brown (1926) in the neighbourhood of Birmingham has found three examples of associated xiphidiocercariae and furcocercariae, one example of xiphidiocercariae and echinostome cercariae, and two examples of echinostome cercaria, all from Limnaea stagnalis L.

scholarly journals Larval trematodes in freshwater gastropods from Mato Grosso, Brazil: diversity and host-parasites relationships

2013 ◽  
Vol 13 (4) ◽  
pp. 34-38 ◽  
Author(s):  
Aline Carvalho de Mattos ◽  
Maria Fernanda Furtado Boaventura ◽  
Monica Ammon Fernandez ◽  
Silvana Carvalho Thiengo
Keyword(s):  
Schistosoma Mansoni ◽  
Intermediate Host ◽  
Intermediate Hosts ◽  
Mato Grosso ◽  
Freshwater Gastropods ◽  
Larval Stages ◽  
Pomacea Maculata ◽  
Surrounding Areas ◽  
First Time

A survey for freshwater gastropods carrying trematodes parasites was conducted in Manso Dam and the surrounding areas frequented by tourist, focusing particularly on the Pantanal region. Infected snails were recovered from twelve of the eighteen investigated municipalities and forty-one cercaria-snail pairings were recorded. Among these pairings were several first records of snails serving as intermediate hosts for trematodes in Brazil including Biomphalaria amazônica Paraense, 1966, Biomphalaria occidentalis Paraense, 1981, Marisa planogyra Pilsbry, 1933, Pomacea maculata Perry, 1830, Pomacea scalaris (d'Orbigny, 1835) and Gundlachia radiata (Guilding, 1828). Echinostomatidae and Strigeidae were the most common trematode families (ca. 47%) and the greatest diversity of larvae were obtained from Drepanotrema lucidum (Pfeiffer, 1839). Paramphistomatidae, Schistosomatidae or Spirorchiidae and Notocotylidae or Pronocephalidae were recovered in D. lucidum for the first time extending the number of families which use this gastropod as intermediate host. Although no specimens were found harboring larval stages of Schistosoma mansoni Sambon, 1907 other trematode larvae were discovered, including the Schistosomatidae Brevifurcate apharingeate cercaria that can cause dermatitis in humans. Continued studies on the taxonomy and biology of trematodes are essential to better understand the biodiversity of these parasites as well as the epidemiological aspects for control of associated zoonosis.

Cercariae Opisthorchis felineus and Metorchis bilis from first intermediate hosts for the first time in basin of Chany lake (Novosibirsk region, Russia) is found

2016 ◽  
Vol 3 (3) ◽  
pp. 421-429 ◽  
Author(s):  
Сербина ◽  
E. Serbina
Keyword(s):  
Human Health ◽  
Western Siberia ◽  
Intermediate Hosts ◽  
Double Infection ◽  
Host Snail ◽  
Opisthorchis Felineus ◽  
Novosibirsk Region ◽  
Lake Systems ◽  
First Time

Objective of research: to perform the analysis of long-term (15 annum) dynamics of Bithyniidae snails infected by trematode parthenites from the Chany Lake, the biggest lake in the south of Western Siberia. Materials and methods: The Bithyniidae snails examined in the lake-river systems Chany Lake in 1994-2013 (in the middle reaches and in the estuary of the Kargat River) and in the Zolotye Rossypi Bay and the Malye Chany Lake. The Bithyniidae snails were collected from May to September (twice in any ten days) by hand from 4–6 plots of 0.25 m2 at a depth of 0.1–0.7 m. In total, 8,316 Bithynia troscheli (Paasch, 1842) and 766 В. tentaculata (L., 1758) were examined. Identification of parthenitae trematode was based on observation when mature cercariae were capable of leaving the shell of the host snail on their own. Results and discussion: In Bithyniidae snails, we found parthenites from trematodes from 12 families Cyathocotylidae Mühling, 1898 Poche, 1925; Prosthоgonimidae Luhe, 1909; Pleurogenetidae Looss, 1898; Lecithodendriidae Odhner, 1911; Microphallidae (Ward, 1901) Travassos, 1920; Plagiorchiidae Lühe, 1901 Echinostomatidae (Looss 1899) Dietz, 1909 Odhner 1910); Psilostomidae (Looss 1900) Odhner 1913; Notocotylidae Luhe, 1909; Monorchiidae Odhner, 1911; Cyclocoelidae Kossack, 1911 и Opisthorchidae (Lass, 1899) Braun, 1901. The prevalence of bithyniid snails infected by trematode parthenites varied from 1,6% to 24,1% in different years The double infection by trematode parthenites was found in 0,96% bithyniid snails from estuary of the Kargat River; 4,45% in the Malye Chany Lake, and 26,6%, in the Zolotye Rossypi Bay. The cercariae of Opisthorchidae family in four annum of the fifteen detected. The prevalence of bithyniid snails infected by trematode parthenites from Opisthorchis felineus (Rivolta, 1884) and Metorchis bilis (Braun, 1890) was observed in Chany Lake systems for the first time. Both species (O. felineus and M. bilis) of trematodes have danger to human health and causes very dangerous disease, opisthorchiasis and metorchiasis.

scholarly journals Genotyping of the prevalent Chlamydia trachomatis strains involved in cervical infections in women in Ahvaz, Iran

2010 ◽  
Vol 59 (9) ◽  
pp. 1023-1028 ◽  
Author(s):  
Behrouz Taheri Beni ◽  
Hossein Motamedi ◽  
Mohammad Roayaei Ardakani
Keyword(s):  
Chlamydia Trachomatis ◽  
Clinical Symptoms ◽  
Age Groups ◽  
Lower Abdominal Pain ◽  
Rflp Analysis ◽  
The Other ◽  
Pcr Rflp ◽  
First Time ◽  
Genotype F ◽  
Genotype E

To determine the prevalence of cervical Chlamydia trachomatis genotypes in Iran for the first time and their association with three clinical symptoms/signs, i.e. abnormal vaginal discharge, lower abdominal pain (LAP) and swab-induced bleeding, and patient age, 620 cervical specimens were obtained from women with symptomatic genital infection referred to gynaecological clinics and 108 C. trachomatis-positive specimens were genotyped by direct omp1 gene PCR-RFLP analysis. Eight genotypes were identified. The most prevalent genotype was E (31.5 %), followed by F (23.1 %), D/Da (13 %), K (9.2 %), I (8.3 %), G (7.5 %), H (5.5 %) and J (1.9 %). For analysing the association of C. trachomatis genotypes with symptoms/signs and age, P-values were separately evaluated for genogroups and genotypes. The analysis of genogroups showed that women infected with genogroup F/G manifested the symptom of LAP significantly more often than those infected with the other genogroups (P=0.02), while the analysis of genotypes revealed that women infected with genotype F reported LAP slightly more often than women infected with the other genotypes (P=0.08). No significant correlation between genogroups and age was found; however, genotype E was somewhat less prevalent among women aged 25–34 years than among other age groups (P=0.08).

Morphology of the complete larval stages of Portunus segnis (Forskål, 1775) (Crustacea: Brachyura: Portunidae) from the Gulf of Aqaba, Saudi Arabia

Zootaxa ◽  
2019 ◽  
Vol 4638 (2) ◽  
pp. 199-218
Author(s):  
ALI M. AL-AIDAROOS ◽  
A. A. J. KUMAR ◽  
AHMED E. AL-HAJ ◽  
ABDULMOHSIN AL-SOFYANI ◽  
MICHAEL P. CROSBY ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Species Complex ◽  
Unique Feature ◽  
Ovigerous Female ◽  
The Other ◽  
Gulf Of Aqaba ◽  
Portunus Pelagicus ◽  
Larval Stages ◽  
First Time ◽  
Portunus Segnis

Portunus pelagicus (Linnaeus, 1758) sensu lato has been recognized as a species complex comprising four species. Of these four species, the larval stages of all except Portunus segnis (Forskål, 1775), have been described. The larvae of P. segnis, hatched from an ovigerous female, caught in the Gulf of Aqaba, were cultured in the laboratory up to the megalopa stage. All the larval stages are described herein for the first time. The number of aesthetascs of the antennules of all the zoeal stages of P. segnis differs from those of the larvae of the other species of the P. pelagicus species complex. In the telson forks of zoea I–IV of P. segnis, there is a pair of ventral spines and two pairs of dorsal spines, whereas in the other P. pelagicus species complex larvae, there is a pair each of ventral and dorsal spines. Another unique feature, in the megalopa of P. segnis, are two endopod hooks in pleonites I–V. Different zoeal and megalopal stages of P. segnis can be distinguished clearly from the other P. pelagicus species complex larvae based on the number of setae and patterns of different appendages. 

scholarly journals Larval trematodes infecting the South-American intertidal mud snail Heleobia australis (Rissooidea: Cochliopidae)

2014 ◽  
Vol 59 (1) ◽  
Author(s):  
Pilar Alda ◽  
Sergio Martorelli
Keyword(s):  
South American ◽  
Intermediate Hosts ◽  
Bahía Blanca Estuary ◽  
Larval Stages ◽  
Mud Snail ◽  
The World ◽  
Single Exception ◽  
First Time ◽  
Parasite Assemblages ◽  
Blanca Estuary

AbstractLarval trematodes infecting the snail Heleobia australis (Cochliopidae) from the Bahía Blanca estuary, Argentina were surveyed for two years. A total of 7,504 snail specimens was dissected and the larval stages of 15 different trematodes were recovered and examined morphologically. These larvae included four species that had previously been reported from H. australis in Brazil, Uruguay, and Argentina: the heterophyid Ascocotyle (Phagicola) longa and the microphallids, Maritrema bonaerense, Maritrema orensense, and Microphallus simillimus. Three other species, the echinostomatid Stephanoprora uruguayensis, the microphallid Levinseniella cruzi, and the psilostomid Psilochasmus oxyurus are reported here for the first time as parasites of H. australis. Eight other trematodes found in H. australis are described and placed in the appropriate superfamilies, families or genera (Cryptogonimidae, Apocreadiidae, Aporocotylidae, Notocotylidae, Haploporidae, Renicolidae, Himasthla, and Renicola). The prevalence of the trematode taxa infecting H. australis in the Bahía Blanca estuary was low (<3%) with a single exception (M. simillimus; >20%). Microphallidae were the richest and the most prevalent family, probably because of the high abundance of crabs — the second-intermediate hosts of certain microphallid species — and the considerable diversity of gulls. Here we compare the parasite assemblage found in the H. australis from Bahía Blanca estuary with other parasite assemblages infecting Heleobia spp. and other rissooids from the rest of the world.

scholarly journals The teeth whitening in an age aspect: prevalance of the method use, substantiation of its carrying out and possible complications (clinical research)

2021 ◽  
Vol 11 (4) ◽  
pp. 222-232
Author(s):  
T. Tereshyna ◽  
V. Pakhlevanzade
Keyword(s):  
Clinical Research ◽  
Age Groups ◽  
Pain Syndrome ◽  
Study Groups ◽  
The Other ◽  
The Past ◽  
Current Article ◽  
And Gender ◽  
The University ◽  
First Time

The following article presents results of the clinical research on prevalence of use, justification of leading and development of possible complications due to the teeth’ whitening. The main aim of the research is to study prevalence of apply of the teeth’ whitening procedure among patients of different age groups in the Dental Department of the Odessa University Clinic, with a study on indications for leading the aforementioned procedure, as well as complications, that had been developed as a result of it. The research materials are: anamnestic data of patients from the University Clinic, who underwent the teeth’ whitening procedure. Moreover, we had taken into account the following indexes: patient’s age, presence of concominant pathology, the data on leading the teeth’ whitening procedure in the past. The main group was presented by 32 patients, who underwent the aforementioned procedure for the first time in their lives. The group of comparison is represented by 33 patients, who underwent the same procedure couple of times before (once, twice, three times or four times). The research methods: anamnestic, statistical. The methods of whitening, that had been chosen: hardware whitening, laser beam, thermocatalytic whitening and use of chemical catalysts. The analysis of anamnestic data, which was held, make us possible to postulate, that 5% of patients from both groups did not have any complications after the teeth’ whitening procedure. The other patients of the study groups though had a stable pain syndrome, the intensity of which is increasing in 24-48 hours after the procedure and last in average 5-7 days. The folowing article presents a data on a fact, what concominant conditions and diseases of the oral cavity do stimulate a pain syndrome development more often and during what period of time. The current article also describes a character of inner-connections between pain syndrome and gender feature as well as presence of such procedures in the past. The authors had postulated, that the less traumatic and quite efficient method is oxidative cleavage of enzymes, by using which a stable long-lasting effect is reached, as well as there is a lack of pain after the procedure.

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