Migrant health in French Guiana: Are undocumented immigrants more vulnerable?

<p>Abstract</p> <p>Background</p> <p>Few data exist on the health status of the immigrant population in French Guiana. The main objective of this article was to identify differences in its health status in relation to that of the native-born population.</p> <p>Methods</p> <p>A representative, population-based, cross-sectional survey was conducted in 2009 among 1027 adults living in Cayenne and St-Laurent du Maroni. Health status was assessed in terms of self-perceived health, chronic diseases and functional limitations. The migration variables were immigration status, the duration of residence in French Guiana and the country of birth. Logistic regression models were conducted.</p> <p>Results</p> <p>Immigrants account for 40.5% and 57.8% of the adult population of Cayenne and St-Laurent du Maroni, respectively. Most of them (60.7% and 77.5%, respectively) had been living in French Guiana for more than 10 years. A large proportion were still undocumented or had a precarious legal status. The undocumented immigrants reported the worst health status (OR = 3.18 [1.21-7.84] for self-perceived health, OR = 2.79 [1.22-6.34] for a chronic disease, and OR = 2.17 [1.00-4.70] for a functional limitation). These differences are partially explained by socioeconomic status and psychosocial factors. The country of birth and the duration of residence also had an impact on health indicators.</p> <p>Conclusion</p> <p>Data on immigrant health are scarce in France, and more generally, immigrant health problems have been largely ignored in public health policies. Immigrant health status is of crucial interest to health policy planners, and it is especially relevant in French Guiana, considering the size of the foreign-born population in that region.</p

Entomological indicators of Plasmodium species transmission in Goma Tsé-Tsé and Madibou districts, in the Republic of Congo

Background: Malaria remains a major public health problem in the Republic of Congo, with Plasmodium falciparum being the deadliest species of Plasmodium in humans. Vector transmission of malaria is poorly studied in the country and no previous report compared rural and urban data. This study aimed to determine the Anopheles fauna and the entomological indices of malaria transmission in the rural and urban areas in the south of Brazzaville, and beyond. Methods: Indoor household mosquitoes capture using electric aspirator was performed in rural and urban areas during raining and dry seasons in 2021. The identification of Anopheles species was done using binocular magnifier and nested-PCR. TaqMan and nested-PCR were used to detect the Plasmodium species in the head/thorax and abdomens of Anopheles. Some entomological indices including the sporozoite infection rate, the entomological inoculation rate and the man biting rate were estimated. Results: A total of 699 Anopheles mosquitoes were collected: Anopheles gambiae sensu lato (s.l.) (90.7%), Anopheles funestus s.l. (6.9%), and Anopheles moucheti (2.4%). Three species of An. gambiae s.l. were identified including Anopheles gambiae sensu stricto (78.9%), Anopheles coluzzii (15.4%) and Anopheles arabiensis (5.7%). The overall sporozoite infection rate was 22.3% with a predominance of Plasmodium falciparum, followed by Plasmodium malariae and Plasmodium ovale. Anopheles aggressiveness rate was higher in households from rural area (1.1 bites/night) compared to that from urban area (0.8 ib/p/n). The overall entomological inoculation rate was 0.13 ib/p/n. This index was 0.17 ib/p/n and 0.092 ib/p/n in rural and in urban area, respectively, and was similar during the dry (0.18 ib/p/n) and rainy (0.14 ib/p/n) seasons. Conclusion: These findings highlight that malaria transmission remains high in rural and urban area in the south of Republic of Congo despite the ongoing control efforts, thereby indicating the need for more robust interventions

Comparative study of Plasmodium falciparum msp-1 and msp-2 Genetic Diversity in Isolates from Rural and Urban Areas in the South of Brazzaville, Republic of Congo

Polymorphisms in the genes encoding the merozoite surface proteins msp-1 and msp-2 are widely used markers for characterizing the genetic diversity of Plasmodium falciparum. This study aimed to compare the genetic diversity of circulating parasite strains in rural and urban settings in the Republic of Congo after the introduction of artemisinin-based combination therapy (ACT) in 2006. A cross-sectional survey was conducted from March to September 2021 in rural and urban areas close to Brazzaville, during which Plasmodium infection was detected using microscopy (and nested-PCR for submicroscopic infection). The genes coding for merozoite proteins-1 and -2 were genotyped by allele-specific nested PCR. Totals of 397 (72.4%) and 151 (27.6%) P. falciparum isolates were collected in rural and urban areas, respectively. The K1/msp-1 and FC27/msp-2 allelic families were predominant both in rural (39% and 64%, respectively) and urban (45.4% and 54.5% respectively) areas. The multiplicity of infection (MOI) was higher (p = 0.0006) in rural areas (2.9) compared to urban settings (2.4). The rainy season and the positive microscopic infection were associated with an increase in MOI. These findings reveal a higher P. falciparum genetic diversity and MOI in the rural setting of the Republic of Congo, which is influenced by the season and the participant clinical status

The Calabrian Arc subduction complex in the Ionian Sea: Regional architecture, active deformation, and seismic hazard

We analyzed the structure and evolution of the external Calabrian Arc (CA) subduction complex through an integrated geophysical approach involving multichannel and single‐channel seismic data at different scales. Pre‐stack depth migrated crustal‐scale seismic profiles have been used to reconstruct the overall geometry of the subduction complex, i.e., depth of the basal detachment, geometry and structural style of different tectonic domains, and location and geometry of major faults. High‐resolution multichannel seismic (MCS) and sub‐bottom CHIRP profiles acquired in key areas during a recent cruise, as well as multibeam data, integrate deep data and constrain the fine structure of the accretionary wedge as well as the activity of individual fault strands. We identified four main morpho‐structural domains in the subduction complex: 1) the post‐Messinian accretionary wedge; 2) a slope terrace; 3) the pre‐Messinian accretionary wedge and 4) the inner plateau. Variation of structural style and seafloor morphology in these domains are related to different tectonic processes, such as frontal accretion, out‐of-sequence thrusting, underplating and complex faulting. The CA subduction complex is segmented longitudinally into two different lobes characterized by different structural style, deformation rates and basal detachment depths. They are delimited by a NW/SE deformation zone that accommodates differential movements of the Calabrian and the Peloritan portions of CA and represent a recent phase of plate re‐organization in the central Mediterranean. Although shallow thrust‐type seismicity along the CA is lacking, we identified active deformation of the shallowest sedimentary units at the wedge front and in the inner portions of the subduction complex. This implies that subduction could be active but aseismic or with a locked fault plane. On the other hand, if underthrusting of the African plate has stopped recently, active shortening may be accommodated through more distributed deformation. Our findings have consequences on seismic hazard, since we identified tectonic structures likely to have caused large earthquakes in the past and to be the source regions for future events

Prevalence of non- Plasmodium falciparum species in southern districts of Brazzaville in The Republic of the Congo

Background: Although Plasmodium falciparum infection is largely documented and this parasite is the main target for malaria eradication, other Plasmodium species persist, and these require more attention in Africa. Information on the epidemiological situation of non-P. falciparum species infections is scarce in many countries, including in the Democratic Republic of the Congo (hereafter Republic of the Congo) where malaria is highly endemic. The aim of this study was to determine the prevalence and distribution of non-P. falciparum species infections in the region south of Brazzaville. Methods: A cross-sectional survey was conducted in volunteers living in rural and urban settings during the dry and rainy seasons in 2021. Socio-demographic and clinical parameters were recorded. Plasmodium infection in blood samples was detected by microscopic analysis and nested PCR (sub-microscopic analysis). Results: Of the 773 participants enrolled in the study, 93.7% were from the rural area, of whom 97% were afebrile. The prevalence of microscopic and sub-microscopic Plasmodium spp. infection was 31.2% and 63.7%, respectively. Microscopic Plasmodium malariae infection was found in 1.3% of participants, while sub-microscopic studies detected a prevalence of 14.9% for P. malariae and 5.3% for Plasmodium ovale. The rate of co-infection of P. malariae or P. ovale with P. falciparum was 8.3% and 2.6%, respectively. Higher rates of sub-microscopic infection were reported for the urban area without seasonal fluctuation. In contrast, non-P. falciparum species infection was more pronounced in the rural area, with the associated risk of the prevalence of sub-microscopic P. malariae infection increasing during the dry season. Conclusion: There is a need to include non-P. falciparum species in malaria control programs, surveillance measures and eradication strategies in the Republic of the Congo. Graphical Abstract

Variation in Size and Growth of the Great Scallop Pecten maximus along a Latitudinal Gradient

Understanding the relationship between growth and temperature will aid in the evaluation of thermal stress and threats to ectotherms in the context of anticipated climate changes. Most Pecten maximus scallops living at high latitudes in the northern hemisphere have a larger maximum body size than individuals further south, a common pattern among many ectotherms. We investigated differences in daily shell growth among scallop populations along the Northeast Atlantic coast from Spain to Norway. This study design allowed us to address precisely whether the asymptotic size observed along a latitudinal gradient, mainly defined by a temperature gradient, results from differences in annual or daily growth rates, or a difference in the length of the growing season. We found that low annual growth rates in northern populations are not due to low daily growth values, but to the smaller number of days available each year to achieve growth compared to the south. We documented a decrease in the annual number of growth days with age regardless of latitude. However, despite initially lower annual growth performances in terms of growing season length and growth rate, differences in asymptotic size as a function of latitude resulted from persistent annual growth performances in the north and sharp declines in the south. Our measurements of daily growth rates throughout life in a long-lived ectothermic species provide new insight into spatio-temporal variations in growth dynamics and growing season length that cannot be accounted for by classical growth models that only address asymptotic size and annual growth rate

Du Coran à la philosophie

C'est un long cheminement qui a conduit la langue arabe de ses débuts à une expression philosophique. À partir du premier monument littéraire qui nous soit parvenu, le Coran, l'évolution a progressivement ajouté, à une langue et à une production très marquées par l'oralité, les caractères propres à l'écriture. À travers l'étude de la langue du Coran et du ḥadīṯ, à travers les disciplines religieuses comme le kalāmou le fiqh, à travers certaines formes littéraires, se sont longtemps manifestés les caractères de l'oralité. Tandis qu'avec les sciences et plus particulièrement la philosophie, les traits caractéristiques de l'écrit vont se trouver affirmés. C'est ce que cherchera à établir la seconde partie de ce travail en analysant ce que nous apporte l'œuvre de Farabi (870-950) dans sa réflexion sur le langage. Héritier des générations qui l'ont précédé, Farabi l'est aussi des grands penseurs de l'Antiquité grecque, et plus particulièrement de Platon et Aristote. Mais il réalisera une synthèse originale et posera une problématique qui lui est propre pour aborder, dans son Kitāb al-ḥurūf(Le livre des lettres), les questions de la naissance du langage et des sciences. Il en ressort un recours et un rapport au langage qui sont tout à fait différents de ceux de ses contemporains. Avec Farabi, la langue philosophique arabe est née, et cette langue a quitté le terrain de l'oralité pour celui de l'écrit.It was a long process which led the Arabic language from its beginnings to a philosophical expression. From the first literary masterpiece that was passed down to us, the Koran, evolution has progressively added, to a language and a literary output which were largely influenced by orality, characters peculiar to written tradition. It was in the study of Koranic and ḥadīthlanguages, in the religious disciplines such as kalāmand fiqhand in certain forms of literature that oral characteristics appeared for a long time pre-eminent. Whereas with sciences and more particularly philosophy, the characteristic traits of written tradition became established. This is what the second part of this work will seek to demonstrate through the reflexion on the language found in Farabi (870-950) 's work. Heir to generations that preceeded him, Farabi also inherited the knowledge of the great thinkers of Ancient Greece, particularly Plato and Aristotle. He will achieve a unique synthesis and will set his own range of analysis to confront, in his Kitāb al-ḥurūf (The book of letters), questions regarding the birth of language and sciences. From this emerge a recourse and a reference to language that are all together different from those of his contemporaries. The language of Arabic philosophy was born through Farabi, and progressed from its oral roots to the written word.تقدمتاللغةالعربيةعبرطريقطويلقادهامنبداياتهاحتىالتعبيرالفلسفي. وانطلاتأمنأولى الآثارالأديةالواصلةإيا- القرآن- أضافإلىلغةدارنتاجلغويشديديالتأثربالمشافهة٠ولطالماظهرتخصائصىالمشافهةهذهواضحةمواءعبردراماتلغةالقرآنوالحديثأوعبرعلومالدينكالكلاموالفقهاوعبربعضالأشكالالأدبية. فيأثآءذلككانتخصائصالكتابةتتأكدفيلغةالعلوموفيلغةالفلسفةيثكلخاص. وهذاماميحاولالقمالثانيمنهذاالعملتبيانهمنخلالمايقدمهلناكتابالف؛راييلدىمناقشتهلمألةاللغة. والفارابيوريثالأجيالالمالفةوريثبنفسالقدرلكبارفلاسفةاليونانالقديمة،وبوجهخامنلأفلاطونوأرمطوطاليس* لكنهذالمبمعهمنإنجازتركيبلميسبقهإليهأحد،كمالمبمعهمنطرحإشكاليةخاصةبهلمقاربةقضايانثوءاللغةوالعلوموذلكفيمؤلفهتكتابالحروف. ويتميزهذاالكتاببلغتهوبالعلاقةالتييبنيهامعاللغةبثكلعامممايجعلهمختلفاعنالأعمالالمعاصرةله. إناللغةالفلسفيةالعربيةقدوكدتمعالفارابيومعهانتقلتمنميدانالمشافهةإلىميدانالكتابة

Approche methodologique de la repartition nychtemerale des prises d'aliment chez le lapin domestique en croissance.

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