scholarly journals Genera and Species of the Anisakidae Family and Their Geographical Distribution

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2374
Author(s):  
Juan C. Ángeles-Hernández ◽  
Fabian R. Gómez-de Anda ◽  
Nydia E. Reyes-Rodríguez ◽  
Vicente Vega-Sánchez ◽  
Patricia B. García-Reyna ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Marine Mammals ◽  
Morphological Changes ◽  
Correct Diagnosis ◽  
Geographical Area ◽  
Clinical Importance ◽  
Human Organism ◽  
Intermediate Hosts ◽  
European Continent ◽  
Molecular Tests

Nematodes of the Anisakidae family have the ability to infest a wide variety of aquatic hosts during the development of their larval stages, mainly marine mammals, aquatic birds, such as pelicans, and freshwater fish, such crucian carp, these being the hosts where the life cycle is completed. The participation of intermediate hosts such as cephalopods, shrimp, crustaceans and marine fish, is an important part of this cycle. Due to morphological changes and updates to the genetic information of the different members of the family, the purpose of this review was to carry out a bibliographic search of the genus and species of the Anisakidae family identified by molecular tests, as well as the geographical area in which they were collected. The Anisakidae family is made up of eight different parasitic genera and 46 different species. Those of clinical importance to human health are highlighted: Anisakis pegreffi, A. simplexsensu stricto, Contracaecumosculatum, Pseudoterranova azarazi, P. cattani, P. decipiens and P. krabbei. The geographical distribution of these genera and species is located mainly in the European continent, Asia and South America, as well as in North and Central America and Australia. Based on the information collected from the Anisakidae family, it was determined that the geographical distribution is affected by different environmental factors, the host and the ability of the parasite itself to adapt. Its ability to adapt to the human organism has led to it being considered as a zoonotic agent. The disease in humans manifests nonspecifically, however the consumption of raw or semi-raw seafood is crucial information to link the presentation of the parasite with the disease. The use of morphological and molecular tests is of utmost importance for the correct diagnosis of the genus and species of the Anisakidae family.

Ecology and biogeography in the introduction to “De bestiis marinis” by Georg Wilhelm Steller

2019 ◽  
Vol 46 (1) ◽  
pp. 63-74
Author(s):  
Stefano Mattioli
Keyword(s):  
Body Size ◽  
Phenotypic Plasticity ◽  
Geographical Distribution ◽  
Functional Traits ◽  
Marine Mammals ◽  
Main Part ◽  
Wide Distribution ◽  
Restricted Range ◽  
Direct Influence ◽  
Modern Biology

The rediscovery of the original, unedited Latin manuscript of Georg Wilhelm Steller's “De bestiis marinis” (“On marine mammals”), first published in 1751, calls for a new translation into English. The main part of the treatise contains detailed descriptions of four marine mammals, but the introduction is devoted to more general issues, including innovative speculation on morphology, ecology and biogeography, anticipating arguments and concepts of modern biology. Steller noted early that climate and food have a direct influence on body size, pelage and functional traits of mammals, potentially affecting reversible changes (phenotypic plasticity). Feeding and other behavioural habits have an impact on the geographical distribution of mammals. Species with a broad diet tend to have a wide distribution, whereas animals with a narrow diet more likely have only a restricted range. According to Steller, both sea and land then still concealed countless animals unknown to science.

Distribution of the cestode Urocystis prolifer Villot, 1880 (Cyclophyllidea: Hymenolepididae) in the Palaearctic and new data on its postembryonic development

2021 ◽  
Vol 95 ◽  
Author(s):  
S.A. Kornienko ◽  
L.A. Ishigenova
Keyword(s):  
Host Specificity ◽  
Geographical Distribution ◽  
Experimental Infection ◽  
Definitive Host ◽  
Intestinal Parasite ◽  
Geographic Area ◽  
Postembryonic Development ◽  
Generic Diagnosis ◽  
Intermediate Hosts ◽  
Very High

Abstract Urocystis prolifer Villot, 1880 is an intestinal parasite of Sorex spp. In the Palaearctic. There are significant differences in the descriptions of both adults and stages of ontogenesis of U. prolifer as described by various authors. The experimental infection of intermediate hosts with cestodes has been conducted. An overview of the geographical distribution, infestation of the definitive hosts and the development of the metacestode stages of U. prolifer are presented. The cestode is characterized by an extensive geographic area in the Palaearctic, wide host specificity and very high rates of infection of its definitive host. Urocystis prolifer has been recorded mostly in the taiga and forest zones of Palaearctic. Fourteen species of Sorex were registered as the definitive host. Redescription of U. prolifer and an amended generic diagnosis are provided. A complete description of the ontogeny from oncosphere to fully developed metacestode is given. Features of development of the metacestode are an asexual larval reproduction, the absence of the anterior and posterior obturator valve in the cyst of the fully developed urocyst, as well as excretory bodies.

scholarly journals Global warming and temperature-mediated increases in cercarial emergence in trematode parasites

Parasitology ◽  
2005 ◽  
Vol 132 (1) ◽  
pp. 143-151 ◽  
Author(s):  
R. POULIN
Keyword(s):  
Global Warming ◽  
Geographical Distribution ◽  
Climate Models ◽  
Extreme Values ◽  
Geometric Mean ◽  
Effect Of Temperature ◽  
Trematode Species ◽  
Intermediate Hosts ◽  
Cercarial Production ◽  
Trematode Parasites

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.

Uromyces dianthi. [Descriptions of Fungi and Bacteria].

1968 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Geographical Distribution ◽  
Ivory Coast ◽  
Intermediate Hosts

Abstract A description is provided for Uromyces dianthi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pycnia and aecia on Euphorbia, uredia and telia on Dianthus, Arenaria, Bufonia, Gypsophila, Lycnis, Saponaria, Tunica, Saxifraga and Silene. DISEASE: Carnation rust. On leaves and stems of carnation and other members of the Caryophyllaceae. It occurs on cultivated carnation all the year round, causing much injury. The aecidial host is deformed by the rust and affected plants often do not flower. GEOGRAPHICAL DISTRIBUTION: Africa (Ivory Coast, Ghana, Guinea); Asia (Ceylon, India, Japan, Pakistan). (Herb. IMI & Literature.) TRANSMISSION: Not known. The rust has not been known to survive the summer in Delhi (India) and the mode of perennation is uncertain (40: 10). Stored at 5°C the urediospores remained viable for 4 months. It has been suggested that in India the rust could survive the summer in the lower hills either on regular crops or on intermediate hosts such as C. medicaginea, reported to be a perennial in the hills (Joshi, 1960).

scholarly journals Morfología, caracterización y distribución geográfica de Blechnum cordatum (Blechnaceae-Pteridophyta).

2008 ◽  
Vol 33 ◽  
pp. 29-46 ◽  
Author(s):  
Carmen Prada ◽  
Cristina H. Rolleri ◽  
Lilian Passarelli
Keyword(s):  
South America ◽  
Geographical Distribution ◽  
Geographical Area ◽  
Vulnerable Species ◽  
Vegetative Tissue ◽  
Juan Fernández Islands ◽  
Large Geographical Area ◽  
Distribución Geográfica ◽  
Morphology Characterization ◽  
Juan Fernandez Islands

ABSTRACT. Morphology, characterization, and geographical distribution of Blechnum cordatum (Blechnaceae-Pteridophyta). Specimens of Blechnum cordatum from localities of its large geographical area were analized. The species grows in Mesoamerica, Antillas and South America, from Venezuela and Colombia to Bolivia, SE and centre of Brazil, Paraguay, Argentina, centre and S of Chile, and Juan Fernández Islands. Blechnum cordatum is a tolerant, not vulnerable species, with large sporophytes; erect, scaly rhizomes; dimorphic fronds with scaly stipes and axes; lanceolate sterile laminae with lanceolate to oblong, coriaceae, finely denticulate to serrate, superficially scaly and hairy, attached by costa (peciolulate) pinnae, with cuneate- truncate to subcordate or auriculate bases, and narrowly lanceolate fertile laminae with vegetative tissue of pinnae reduced to the portion which support the undulate to erose indusia and continuous coenosorus. Veins are free, simple, geminate and furcate, the latter ramdomly dividing at different distances from the costa, all ending in large, active hydathodes. Aerophores, located only at the base of pinnae, may be absent. Spores have a cristate-reticulate perispore with filiform, ramified processes, and a smooth to granulate exospore. Based on this study, a new description of Blechnum cordatum, and its taxonomy is presented, along with comments on affinities with other neotropical and paleotropical species of the genus.Key words. Blechnaceae, Blechnum cordatum, morphology, taxonomy, palynology, geographical distribution.RESUMEN. Morfología, caracterización y distribución geográfica de Blechnum cordatum (Blechnaceae-Pteridophyta). Blechnum cordatum fue estudiado en especímenes de numerosas localidades de su extensa área de distribución. Crece en Mesoamérica, Antillas, Sudamérica, desde Venezuela y Colombia a Bolivia, SE y centro de Brasil, Paraguay, Argentina, centro y S de Chile e islas de Juan Fernández. Es una especie poco vulnerable, tolerante, con esporófitos grandes, rizomas a oblongas con pinnas coriáceas, lanceolado-oblongas, finamente denticuladas a aserradas, superficialmente escamosas y pilosas, unidas al raquis por la costa (pecioluladas), con bases cuneado- truncadas a subcordadas o auriculadas y láminas fértiles estrechamente lanceoladas con el tejido vegetativo de las pinnas reducido a la porción de la lámina que lleva el cenosoro continuo e indusio ondulado a eroso. Las venas son simples, geminadas y bifurcadas al azar a distancias variables de la costa y terminan en grandes hidatodos activos, sobresalientes o más o menos planos. Los aeróforos, presentes sólo en la base de las pinnas, pueden faltar. Las esporas son monoletas, con perisporio crestado-reticulado que lleva procesos filiformes y exosporio subliso a granulado. La especie se describe e ilustra en detalle, se actualiza su taxonomía y se comentan sus afinidades con otras especies neotropicales y paleotropicales del género.Palabras clave. Blechnaceae, Blechnum cordatum, morfología, taxonomía, palinología, distribución geográfica.

Geographical Distribution of Schistosomes and their Intermediate Hosts

2015 ◽  
pp. 32-249 ◽  
Author(s):  
W. H. Wright ◽  
N. Ayad ◽  
J. Fraga de Azevedo ◽  
F. S. Barbosa ◽  
V. de V. Clarke ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Intermediate Hosts

Phyletic gradualism in a European Plio-Pleistocene Mimomys lineage (Arvicolidae, Rodentia)

Paleobiology ◽  
1986 ◽  
Vol 12 (2) ◽  
pp. 203-216 ◽  
Author(s):  
Jean Chaline ◽  
Bernard Laurin
Keyword(s):  
Gene Flow ◽  
Climatic Change ◽  
Environmental Changes ◽  
Morphological Changes ◽  
Geographical Area ◽  
Continuous Development ◽  
Climatic Fluctuations ◽  
Evolution Analysis ◽  
Gradual Evolution ◽  
Determining Factor

The European Plio-Pleistocene Mimomys (Hintonia) occitanus-ostramosensis lineage of arvicolid rodents appears to present a genuine case of gradual evolution. Analysis of numerous dental samples recorded from 3 to 1.5 ma by several biometrical methods led to the following conclusions: samples from the whole geographical area order into a morphological continuum (chronomorphocline); the successive populations in the trend show important overlap of their variation; and the absence of stasis or any interruption in the trend, combined with its unidirectionality, suggests genuine phyletic gradualism. The chronomorphocline is characterized by an important increase in tooth hypsodonty, by the progressive and continuous development of lateral enamel tracks. Four phases of evolution can be recognized in the lineage, the rates of morphological changes being variable and related to climatic fluctuations (Reuverian, Pretiglian, Tiglian, Eburonian). Morphological changes are initiated by environmental fluctuations, although the polarity of climatic change is not a determining factor. Environmental changes act as stimulus and release drift processes. Phyletic gradualism occurring over such a wide area implies extensive gene flow, and suggests that only general, not local, environmental components act to produce the observed morphological changes.

scholarly journals Seroprevalence, prevalence, and genomic surveillance: monitoring the initial phases of the SARS-CoV-2 pandemic in Betim, Brazil

2021 ◽  
Author(s):  
Ana Valesca Fernandes Gilson Silva ◽  
Diego Menezes ◽  
Filipe Romero Rebello Moreira ◽  
Octavio Alcantara Torres ◽  
Paula Luize Camargos Fonseca ◽  
...  
Keyword(s):  
Local Government ◽  
Geographical Area ◽  
Population Based ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
The Third ◽  
Molecular Tests ◽  
Epidemiological Monitoring ◽  
The City

The Covid-19 pandemic has created an unprecedented need for epidemiological monitoring using diverse strategies. We conducted a project combining prevalence, seroprevalence, and genomic surveillance approaches to describe the initial pandemic stages in Betim City, Brazil. We collected 3239 subjects in a population-based age-, sex- and neighborhood-stratified, household, prospective; cross-sectional study divided into three surveys 21 days apart sampling the same geographical area. In the first survey, overall prevalence (participants positive in serological or molecular tests) reached 0.46% (90% CI 0.12% - 0.80%), followed by 2.69% (90% CI 1.88% - 3.49%) in the second survey and 6.67% (90% CI 5.42% - 7.92%) in the third. The underreporting reached 11, 19.6, and 20.4 times in each survey, respectively. We observed increased odds to test positive in females compared to males (OR 1.88 95% CI 1.25 - 2.82), while the single best predictor for positivity was ageusia/ anosmia (OR 8.12, 95% CI 4.72 - 13.98). Thirty-five SARS-CoV-2 genomes were sequenced, of which 18 were classified as lineage B.1.1.28, while 17 were B.1.1.33. Multiple independent viral introductions were observed. Integration of multiple epidemiological strategies was able to describe Covid-19 dispersion in the city adequately. Presented results have helped local government authorities to guide pandemic management.

scholarly journals Seroepidemiology of Toxoplasma gondii in domestic cattle, sheep, goats and pigs from São Tomé and Príncipe

2020 ◽  
Vol 29 (1) ◽  
Author(s):  
Daniela Cruz Pereira ◽  
Jitender Pradash Dubey ◽  
Alfredo da Mata ◽  
Helda Neto ◽  
Luís Cardoso ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Geographical Area ◽  
Central Area ◽  
Local Environment ◽  
Intermediate Hosts ◽  
Adult Age ◽  
Source Of Infection ◽  
Modified Agglutination Test ◽  
Sao Tome And Principe ◽  
Zoonotic Parasite

Abstract Despite the global importance of the zoonotic parasite Toxoplasma gondii, little is known regarding its infection in the Democratic Republic of São Tomé and Príncipe (DRSTP). This is the first report of antibodies to T. gondii in cattle, sheep, goats and pigs from the DRSTP. Antibodies were assessed by the modified agglutination test (MAT), with a cut-off titer of 100 for cattle and 20 for sheep, goats and pigs. The present study revealed an overall seroprevalence of 55.8%; 27.1% in 48 cattle, 68.4% in 98 sheep, 70.1% in 97 goats and 43.7% in 103 pigs. The south geographical area for cattle, the central area for sheep, and adult age and living in the central region for goats were found to be risk factors for seropositivity to T. gondii. These results support the scenario of a considerable presence of sporulated oocysts as well as of infected intermediate hosts in the local environment. Consumption of raw or undercooked meat should be considered as an important potential source of infection for animals and humans in the DRSTP.

scholarly journals Editorial foreword

2009 ◽  
Vol 1 (1) ◽  
pp. 5-7
Author(s):  
Silviu Miloiu
Keyword(s):  
International Relations ◽  
Geographical Area ◽  
Scientific Publication ◽  
The Black Sea ◽  
Doctoral Studies ◽  
European Continent ◽  
Research Activities ◽  
History Of ◽  
Set Up ◽  
The Baltic

Having been set up on November 27, 2008, the Romanian Association for Baltic and Nordic Studies (ARSBN) has established as its fundamental goals the promotion of research activities in the field of Baltic and Nordic studies, the encouragement of knowledge in public benefit regarding this geographical area, including by the means of education, especially of higher education, the cooperation with similar institutions and associations from Romania and abroad, the promotion of the dialogue and cooperation on the axis the Baltic Sea – the Black Sea. In this regard, the establishing of a scientific publication to further our knowledge of Baltic and Nordic societies and to spread information about the Romanian society to Baltic and Northern Europe was essential. The magazine was also regarded as a springboard for the mutual acknowledgment of the bonds and relations between Romanians and the Baltic and Nordic peoples throughout their history and in contemporary times. It was our understanding and hope that the magazine will become a multidisciplinary publication hosting articles in fields such as history, history of international relations, international relations, literature and philology, economics and business, and various other sciences. When established, the editorial college also considered that it will be in the advantage of the magazine to include also book and article reviews, assessments of scientific conferences or notes of doctoral studies in the fields covered by the publication which will promote the dialogue between the two peripheries of the European continent.

Sign in / Sign up

Export Citation Format

Share Document