scholarly journals A systematic review of the parasites (Plathelminthes: Trematoda) of the Wels catfish (Silurus glanis L., 1758)

The Wels catfish or sheatfish (Silurus glanis L., 1758) is one of the important commercial fishes. Its native range extends from Eastern Europe to Western Asia. Recently, the species range has expanded both to the west and south due to the introduction. In the water bodies of Azerbaijan, the Wels catfish exists at the southernmost border of its range. It was recorded from the Kura River and its basin. There is no survey of parasitological studies on the trematodes of the Wels catfish. The previous papers have not covered all systematic groups or all the areas where the fish is distributed. Based on the literature data, we prepared a systematic review of the Wels catfish trematodes within the catfish present-day range (native area plus the areas of introduction), including Azerbaijan. The list is given according to the system of parasitic organisms implemented in the Catalog of parasites of freshwater fishes of North Asia. We also took into account new studies in the trematode taxonomy. Each species is provided with the following data: synonyms, habitat in the fish body, collecting localities, geographic distribution within the catfish range, infection rates, and references. As a result, 33 trematode species were found in the Wels catfish. They belong to three orders (Aspidogastridea ‒ 1 species, Strigeida ‒ 16 species, and Plagiorchiida ‒ 16 species), 15 families and 24 genera. Of these, 14 species are distributed in the waterbodies of Azerbaijan. The family Diplostomidae (9 species) dominates among the Wels catfish’ trematode parasites. The most Wels catfish trematodes within its whole range are Bucephalus polymorphus, Orientocreadium siluri and Diplostomum spathaceum. We established that Aspidogaster limacoides, Plagioporus skrjabini, Phyllodistomum petruschewskii were recorded from Ukraine only, Allocreadium siluri and Bolboforus confusus, from Uzbekistan, and Asymphylodora kubanica, Bychowskycreadium bychowsky, Bychowskycreadium schiliani, Diplostomum mergi, Diplostomum chromatophorum, and Diplostomum paraspathaceum from Azerbaijan.

Sleep Health ◽  
2021 ◽  
Author(s):  
Lauren B. Covington ◽  
Freda Patterson ◽  
Lauren E. Hale ◽  
Douglas M. Teti ◽  
Angeni Cordova ◽  
...  

Parasitology ◽  
2005 ◽  
Vol 132 (1) ◽  
pp. 143-151 ◽  
Author(s):  
R. POULIN

Global warming can affect the world's biota and the functioning of ecosystems in many indirect ways. Recent evidence indicates that climate change can alter the geographical distribution of parasitic diseases, with potentially drastic consequences for their hosts. It is also possible that warmer conditions could promote the transmission of parasites and raise their local abundance. Here I have compiled experimental data on the effect of temperature on the emergence of infective stages (cercariae) of trematode parasites from their snail intermediate hosts. Temperature-mediated changes in cercarial output varied widely among trematode species, from small reductions to 200-fold increases in response to a 10 °C rise in temperature, with a geometric mean suggesting an almost 8-fold increase. Overall, the observed temperature-mediated increases in cercarial output are much more substantial than those expected from basic physiological processes, for which 2- to 3-fold increases are normally seen. Some of the most extreme increases in cercarial output may be artefacts of the methods used in the original studies; however, exclusion of these extreme values has little impact on the preceding conclusion. Across both species values and phylogenetically independent contrasts, neither the magnitude of the initial cercarial output nor the shell size of the snail host correlated with the relative increase in cercarial production mediated by rising temperature. In contrast, the latitude from which the snail-trematode association originated correlated negatively with temperature-mediated increases in cercarial production: within the 20 ° to 55 ° latitude range, trematodes from lower latitudes showed more pronounced temperature-driven increases in cercarial output than those from higher latitudes. These results suggest that the small increases in air and water temperature forecast by many climate models will not only influence the geographical distribution of some diseases, but may also promote the proliferation of their infective stages in many ecosystems.


2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Anju Verma ◽  
Rajni Srivastava ◽  
Pankaj Kumar Sonar ◽  
Ramprakash Yadav

Abstract Background Rosa alba L. belongs to the family Rosaceae. This species is widely cultivated in Europe, Asia, North America, and Northwest Africa due to its fragrance, ornamental, and medicinal values. It is commonly known as white oil-bearing rose, white rose, white rose of York, backyard rose, and sufaid gulab. Main text Rosa alba L. has many biological properties like antioxidant, antimicrobial, antifungal, antifertility, teratogenic, memory enhancing, cytotoxic, and genotoxic activities. The essential oil of Rosa alba L. possesses good antimicrobial activity and consists of many chemical constituents like- citronellol, geraniol, nerol, linalool, citral, carvacrol, eugenol, etc. Conclusion This article briefly reviews the cultivation, traditional uses, phytochemistry, and biological activities of Rosa alba L. Many research papers have been published on the proposed plant and still, there is a very vast scope of research on it. Therefore, this review will be very fruitful for those scientists who are doing or plan to do research work on this plant. All the scientific findings written in this review are explored from Google web, Google Scholar, PubMed, ScienceDirect, Medicinal and Aromatic Plants Abstracts (MAPA), and SciFinder. To date, it is the first systematic review article of such kind, on this plant.


Stroke ◽  
2016 ◽  
Vol 47 (suppl_1) ◽  
Author(s):  
Xichenhui Qiu ◽  
Janet W SIT ◽  
Haixia Feng

Introduction: Among the estimated 22.5 million stroke survivors in China, 78% of them require home care. Previous research has indicated that culture can have a significant impact on caregivers’ perceptions of the caregiving role. There is a dearth of research on stroke caregivers’ perceptions within the Chinese culture. Objective: To explore how Chinese culture influences the perceptions of the caregiving role among stroke caregivers. Methods: In this qualitative descriptive study, 14 stroke caregivers were recruited from a 1800-bed regional hospital in China. Caregivers were on average 58 years old (range 46-74), 78% female, 50% spouse-caregivers and 50% children-caregivers. Caregivers spent on average 14 hours per day (range 5-24) providing care. All were 1st time caregivers who had provided stroke caregiving < 12 months. Individual, semi-structured interviews were conducted. Qualitative content analysis was performed. Strategies to achieve trustworthiness include triangulation of the data in the analysis process, member checking and peer debriefing. Results: Three themes emerged from the interviews. (1) Caregiving is a natural expected part of life. All caregivers accepted caregiving for the sick family member as an expected part of life. This perception is deeply rooted in Chinese culture. (2) Caregiving is a culturally prescribed obligation. Spouse caregivers believe that it is their moral obligation to take care of their sick life partner. Female caregivers emphasized their position and role in the family to take up caregiving for sick relative. (3) Caregiving is an expression of reciprocal love within the immediate family. Tangible caregiving and support during adversity are viewed as expression of reciprocal love among family members. Particularly, the children-caregivers believed in the virtue of filial piety and perceived stroke caregiving as a means of repaying their parents. Conclusions: Our findings highlight an underlying acceptance and devotion of undertaking stroke caregiving within the Chinese culture. Researchers and clinicians that plan to develop an intervention to support Chinese stroke caregivers need to consider integrating these findings.


Phytotaxa ◽  
2018 ◽  
Vol 372 (1) ◽  
pp. 35 ◽  
Author(s):  
ÖZLEM ÇETIN ◽  
MUSTAFA ÇELIK

In the present study, morphological, micromorphological, palynological and anatomical characteristics of the genera Opopanax and Crenosciadium are reviewed and compared. The genus Opopanax is distributed in southern Europe, the Mediterranean region and Western Asia, and it is represented by three species in Turkey. Crenosciadium is a poorly known monotypic genus from Turkey, recently treated as synonym in Opopanax. Expanded descriptions, phenology, geographic distributions, and images of habitus of Opopanax and Crenosciadium are given. The differences between the two genera are discussed. The pollen morphology of Opopanax and Crenosciadium is studied by SEM and LM. The palynological results confirmed the stenopalynous characteristic of the family Apiaceae, and revealed that the pollen grains of both genera are perprolate in shape. Also fruit surface ornamentation of both genera is typically striate, and epidermal cells are polygonal or elongated in one direction. Cross-sections of mature fruits are examined and a detailed anatomical description is presented. Mericarp shape and width are very useful characters for discrimination between Opopanax and Crenosciadium; mericarp ribs are also very significant characteristics to discriminate both genera. Our findings, together with previous molecular data, clearly indicate that Crenosciadium differs considerably from Opopanax, and therefore it should be accepted at genus rank.


2005 ◽  
Vol 2 (4) ◽  
pp. 423-434 ◽  
Author(s):  
Stuart J.H. Biddle ◽  
Sarah H. Whitehead ◽  
Toni M. O’Donovan ◽  
Mary E. Nevill

Background:Many adolescent girls have low levels of physical activity and participation declines with age. This review identifies recent correlates of physical activity in adolescent girls.Methods:Systematic review of papers published 1999 to mid-2003. Papers (k = 51) reporting a measure of physical activity and at least one potential correlate of physical activity in adolescent girls were analyzed.Results:Demographics related to physical activity were female gender (–), non-white ethnicity (–), age (–), and socio-economic status (+). Psychological correlates positively associated with physical activity were enjoyment, perceived competence, self-efficacy, and physical self-perceptions. Behavioral correlates showed that smoking was associated with lower and organized sport involvement with greater activity. Physical activity was associated with parental and family support but we found no consistent trends for environmental variables. Effects were small-to-moderate.Conclusions:Modifiable correlates for adolescent girls clustered around “positive psychology,” organized sport involvement, and the family.


Author(s):  
Khotibul Umam ◽  
Moses Glorino Rumambo Pandin

ABSTRACTIntroduction:Human Immunodeficiency Virus (HIV) is a global health problem that is almost recorded in every country. The long-term and long-term negative impacts of HIV cases are stigma and discrimination in people with HIV (PLHIV). The purpose of this study is to find out the stigma and discrimination felt by PLHIV.Method:This study design of systematic review from 4 electronic databases namely Scopus ScienceDirect, Sage and ProQuest by using keywords tailored to Medical Subject Headings (MeSH) including "Stress", "covid", "nursing", "hospital". This study uses PICOS framework to prevent research bias and analysed using descriptive analysis.Results:The results of the analysis of the article showed from 761 articles have been identified title, abstract and full-text so that recorded 15 articles that can be reviewed. The article consists of various designs, namely RCT, cross sectional and qualitative studies. Analysis shows that stigma and discrimination are social phenomena that manifest in several social areas.Conclusion:Stigma and discrimination in people with HIV (PLHIV) is still common, stigma is carried out by the wider community to their own families. The family approach is necessary to improve well-being as well as improve the social community of the family.


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