Prvi nalaz ramenonožaca iz eocena u Egiptu

The brachiopod species Terebratulina tenuistriata (Leymerie) has been identified in the Middle Eocene (Bartonian) nummulitic limestone of the Upper Building Stone Member of the Mokattam Formation at El Basatin of Gebel Mokattam, Cairo, Egypt. The brachiopod is associated with Nummulites farisi Hussein, Boukhary & Kamal, N. praestriatus Boukhary & Kamal and N. bullatus Azzaroli. This is the first record of brachiopods from the Eocene of Egypt and northern Africa. T. tenuistriata is common and widely distributed in the Eocene deposits of Europe, and the present record extends its geographical range further south, to the southern shelf of the Tethys.Vrsta ramenonošca Terebratulina tenuistriata (Leymerie) determinirana je iz srednjeeocenskog (Barton) numulitskog vapnenca formacije Mokattam u području El Basatin, Gebel Mokattam, Kairo, Egipat. Ramenonožac je povezan s Nummulites farisi Hussein, Boukhary & Kamal, N. praestriatus Boukhary & Kamal i N. bullatus Azzaroli. Radi se o prvom nalazu ramenonožaca iz eocena Egipta i sjeverne Afrike. Vrsta T. tenuistriata je uobičajena i široko rasprostranjena u eocenskim naslagama Europe, i ovaj nalaz predstavlja širenje njenog areala na jug, do južnog šelfa Tetisa

Early Eocene Nummulitids from Gebel Umm Russeies, El Galala El Bahariya, Eastern Desert, Egypt

Seven larger foraminiferal species: Nummulites aff. nemkovi SCHAUB, 1966, Nummulites partschi DE LA HARPE, 1880, Nummulites bassiounii BOUKHARY & BLONDEAU, 1991, Nummulites cf. campesinus SCHAUB, 1966, Assilina aff. major HEIM, 1908, Decrouezina aegyptiaca Boukhary, 1994 and Operculina sp. are described from the Early Eocene Gebel Umm Russeies, Northern Galala, Eastern Desert, Egypt. These taxa are biostratigraphically evaluated and according to the standard shallow benthic zones, the identified biozones span SBZ 10 to SBZ 12 in the shallow benthic zones (SBZ) of SERRA-KIEL et al. (1998) which are assigned to the Late Ypresian

Subsurface stratigraphy and micropaleontology of the Neogene rocks, Nile Delta, Egypt

Three wells (Naf-2, Naf-3 and Naf-101), were described and sampled in order to increase understanding of the stratigraphy and micropaleontology of the North Abu Qir Field, Nile Delta, Egypt. Lithostratigraphic studies aided recognition of the following Miocene-Pliocene rock formations (from base to top); Qantara Formation, Sidi Salim Formation, Qawasim Formation, Rosetta Formation, Abu Madi Formation, Kafr El Sheikh Formation, Baltim Formation, Mit Ghamr Formation, and Bilqas Formation. Biostratigraphic studies were based on the distribution of foraminifera through the Miocene-Pliocene succession. The environmental conditions of the Neogene rocks of the studied wells are interpreted using the results of palaeoecological parameters (e.g. the total number of foraminifera (T.N.F) and planktonic/benthonic ratio (P/B)

Bio- and Sequence Stratigraphy of Upper Cretaceous – Palaeogene rocks, East Bahariya Concession, Western Desert, Egypt

This work deals with the plankton stratigraphy of the subsurface Upper Cretaceous-Palaeogene succession of theEast Bahariya Concession based on planktonic foraminifera and calcareous nannofossils. The examination of the cuttings from five wells: AQSA-1X, KARMA-E-1X, KARMA-3X, KARMA-NW-1X and KARMA-NW-5X is biostratigraphically evaluated. It is possible to identify the planktonic foraminifera as well as the calcareous nannofossil biozones. The analyses of calcareous nannofossils revealed the presence of several hiatuses. Information obtained from well data such as seismic facies analysis for the studied area has enabled classification of the Upper Cretaceous Palaeogene succession into five major 2nd order depositional sequences, separated by four major depositional sequence boundaries (SB1, SB2, SB3 and SB4). The Upper Cretaceous-Palaeogene succession in the East Bahariya is dividedinto 17 systems tracts. These systems tracts are: 7 System tracts of probable Cenomanian age, (the sequence stratigraphic framework as well as the cycles and system tracts of the Cenomanian Bahariya Formation match well with thoseof CATUNEANUet al., 2006); 4 System tracts of Turonianage, 2 System tracts of Campanian-Maastrichtian ageand 4 System tracts of Eocene age.</p

Somalina praestefaninii n. sp., a New Species of Large Foraminifera from the Dammam Formation (Lutetian) of Gebel Hafit, United Arab Emirates

The nodular limestones exposed at the basal part of the Gebel Hafit (United Arab Emirates) represent a truncation surface, between the Rus and the Middle Eocene Dammam Formation (Mibazara Member). Somalina praestefaninii n.sp. is a new large foraminiferal species separated from the Mibazara member. It is believed that Somalina praestefaninii n.sp. is the ancestral form of Somalina stefaninii Silvestri as it is smaller and has a more simple protoconch. Here, it is believed that the taxon Somalina (Lutetian) could possibly be derived from Opertorbitolites NUTTALL , 1925 (the taxon characteristic for the Ypresian)

Campanian–Early Eocene Stratigraphy of the Southern Galala Plateau, Eastern Desert, Egypt

Several species of larger foraminifera have been recorded in the Campanian–Early Eocene succession of the Southern Galala Plateau. These species include Orbitoides media (ARCHIAC), Omphalocyclus macropora (LAMARK) in the Campanian–Maastrichtian rocks (Gebel Thelmet Formation and Sudr Chalk) and Fallotella (Fallotella) kochanskae persica HOTTINGER & DROBNE, Fabularia zitteli HOTTINGER, Alveolina pasticillata (SCHWAGER), Glomalveolina dachelensis (SCHWAGER), Miscellanea rhomboidea KUSS & LEPPIG and Nummulites cf. subramondi DE LA HARPE in the Palaeocene– Early Eocene sediments (Southern Galala Formation). There are few intervals yielding planktonic species that contributed significantly to the determination of the age assignment for the larger foraminifera. These species include Globigerina triloculinoides PLUMMER, Morozovella uncinata (BOLLI), Morozovella trinidadensis (BOLLI), Morozovella cf. conicotruncata (SUBBOTINA), Morozovella angulata (WHITE), Planorotalites pseudomenardii (BOLLI) and Acarinina primitiva (FINLAY). These planktonic species placed the Glomalveolina dachelensis (SCHWAGER) zone as being older than the Morozovella angulata (WHITE) zone (Early–Middle Palaeocene). The occurrence of the algae Ethelia alba (PFENDER) and Neomeris plagnensis DELOFFRE further supports the referred age

Vivax malaria in Mauritania includes infection of a Duffy-negative individual

<p>Abstract</p> <p>Background</p> <p>Duffy blood group polymorphisms are important in areas where <it>Plasmodium vivax </it>is present because this surface antigen is thought to act as a key receptor for this parasite. In the present study, Duffy blood group genotyping was performed in febrile uninfected and <it>P. vivax</it>-infected patients living in the city of Nouakchott, Mauritania.</p> <p>Methods</p> <p><it>Plasmodium vivax </it>was identified by real-time PCR. The Duffy blood group genotypes were determined by standard PCR followed by sequencing of the promoter region and exon 2 of the Duffy gene in 277 febrile individuals. Fisher's exact test was performed in order to assess the significance of variables.</p> <p>Results</p> <p>In the Moorish population, a high frequency of the <it>FYB^ES/FYB^ES</it>genotype was observed in uninfected individuals (27.8%), whereas no <it>P. vivax</it>-infected patient had this genotype. This was followed by a high level of <it>FYA/FYB</it>, <it>FYB/FYB</it>, <it>FYB/FYB^ES</it>and <it>FYA/FYB^ES</it>genotype frequencies, both in the <it>P. vivax</it>-infected and uninfected patients. In other ethnic groups (Poular, Soninke, Wolof), only the <it>FYB^ES/FYB^ES</it>genotype was found in uninfected patients, whereas the <it>FYA/FYB^ES</it>genotype was observed in two <it>P. vivax</it>-infected patients. In addition, one patient belonging to the Wolof ethnic group presented the <it>FYB^ES/FYB^ES</it>genotype and was infected by <it>P. vivax</it>.</p> <p>Conclusions</p> <p>This study presents the Duffy blood group polymorphisms in Nouakchott City and demonstrates that in Mauritania, <it>P. vivax </it>is able to infect Duffy-negative patients. Further studies are necessary to identify the process that enables this Duffy-independent <it>P. vivax </it>invasion of human red blood cells.</p

Building the capacity of West African countries in Aedes surveillance: inaugural meeting of the West African Aedes Surveillance Network (WAASuN)

Arboviral diseases such as dengue, Zika and chikungunya transmitted by Aedes mosquitoes have been reported in 34 African countries. Available data indicate that in recent years there have been dengue and chikungunya outbreaks in the West Africa subregion, in countries including Côte d’Ivoire, Burkina Faso, Gabon, Senegal, and Benin. These viral diseases are causing an increased public health burden, which impedes poverty reduction and sustainable development. Aedes surveillance and control capacity, which are key to reducing the prevalence of arboviral infections, need to be strengthened in West Africa, to provide information essential for the formulation of effective vector control strategies and the prediction of arboviral disease outbreaks. In line with these objectives, the West African Aedes Surveillance Network (WAASuN) was created in 2017 at a meeting held in Sierra Leone comprising African scientists working on Aedes mosquitoes. This manuscript describes the proceedings and discusses key highlights of the meeting

Impact des activités humaines sur les cycles biogéochimiques en mer Méditerranée

PARIS-BIUSJ-Thèses (751052125) / SudocPARIS-BIUSJ-Sci.Terre recherche (751052114) / SudocSudocFranceF