4 research outputs found

    Caractérisation Palynologique et Palynofaciologique de la Marge Est (Marge d’Abidjan) du Bassin Sédimentaire de Côte d’Ivoire

    Get PDF
    Des dĂ©pĂ´ts offshores localisĂ©s Ă  l’Est de la marge d’Abidjan (CĂ´te d’Ivoire) ont fait l’objet d’analyse palynologique et palynofaciologique. Elle Ă  portĂ© sur des dĂ©blais de forage Ă  partir desquels trente-deux (32) paires de lames minces palynologiques ont Ă©tĂ© confectionnĂ©es. L’objectif Ă©tait de mettre en Ă©vidence les Ă©tages du Tertiaire et la limite K-Pg par les palynomorphes stratigraphiques et de dĂ©terminer les environnements de dĂ©pĂ´t Ă  travers le palynofaciès. Cinq Ă©tages ont ainsi Ă©tĂ© mis en Ă©vidence. Ce sont le Maastrichtien supĂ©rieur, le PalĂ©ocène inferieur, le PalĂ©ocène supĂ©rieur, l’Eocène infĂ©rieur et l’Eocène moyen sur la base des palynomorphes tels que Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes,  Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Trois (3) types de palynofaciès dont le palynofaciès 1 Ă  phytoclastes dominants dans laquelle les spores et les grains de pollen dominent Ă©voquant un environnement littoral au Maastrichtien et au PalĂ©ocène, un palynofaciès 2 Ă  phytoclastes et matière organique amorphe dominant Ă  l’Eocène dĂ©posĂ© dans un milieu marin marginal et un palynofaciès 3 Ă  matière organique amorphe dominant au palĂ©ocène supĂ©rieur et Ă  l’Eocène indiquant un milieu de plateau continental interne Ă  externe.   Offshore deposits located to the East of Abidjan margin (CĂ´te d’Ivoire) have been the subject of palynological and palynofaciological analysis. It focused on drill cuttings from which thirty-two (32) pairs of palynological thin sections were made. The objective was to highlight the Tertiary stages and the K-Pg boundary by stratigraphic palynomorphs and to determine the deposition environments by palynofacies. Five stages were thus highlighted. These are the Upper Maastrichtian, the Lower Paleocene, the Upper Paleocene, the Lower Eocene and the Middle Eocene based on palynomorphs such as Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes, Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Three (3) types of palynofacies including palynofacies 1 with dominant phytoclasts in which spores and pollen grains dominate, evoking a coastal environment in the Maastrichtian and Paleocene, a palynofacies 2 with phytoclasts and amorphous organic matter dominant in the Eocene deposited in a marginal marine environment and an amorphous organic dominant palynofacies 3 in the Upper Paleocene and Eocene indicating an inner to outer continental shelf environment

    Caractérisation Palynologique et Palynofaciologique de la Marge Est (Marge d’Abidjan) du Bassin Sédimentaire de Côte d’Ivoire

    Get PDF
    Des dĂ©pĂ´ts offshores localisĂ©s Ă  l’Est de la marge d’Abidjan (CĂ´te d’Ivoire) ont fait l’objet d’analyse palynologique et palynofaciologique. Elle a portĂ© sur des dĂ©blais de forage Ă  partir desquels trente-deux (32) paires de lames minces palynologiques ont Ă©tĂ© confectionnĂ©es. L’objectif Ă©tait de mettre en Ă©vidence les Ă©tages du Tertiaire et la limite K-Pg par les palynomorphes stratigraphiques et de dĂ©terminer les environnements de dĂ©pĂ´t Ă  travers le palynofaciès. Cinq Ă©tages ont ainsi Ă©tĂ© mis en Ă©vidence. Ce sont le Maastrichtien supĂ©rieur, le PalĂ©ocène inferieur, le PalĂ©ocène supĂ©rieur, l’Eocène infĂ©rieur et l’Eocène moyen sur la base des palynomorphes tels que Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes,  Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Trois (3) types de palynofaciès dont le palynofaciès 1 Ă  phytoclastes dominants dans laquelle les spores et les grains de pollen dominent Ă©voquant un environnement littoral au Maastrichtien et au PalĂ©ocène, un palynofaciès 2 Ă  phytoclastes et matière organique amorphe dominant Ă  l’Eocène dĂ©posĂ© dans un milieu marin marginal et un palynofaciès 3 Ă  matière organique amorphe dominant au palĂ©ocène supĂ©rieur et Ă  l’Eocène indiquant un milieu de plateau continental interne Ă  externe.   Offshore deposits located to the East of the Abidjan margin (CĂ´te d’Ivoire) have been the subject of palynological and palynofaciological analysis. It focused on drill cuttings from which thirty-two (32) pairs of palynological thin sections were made. The objective was to highlight the Tertiary stages and the K-Pg boundary by stratigraphic palynomorphs and to determine the deposition environments by palynofacies. Five stages were thus highlighted. These are the Upper Maastrichtian, the Lower Paleocene, the Upper Paleocene, the Lower Eocene, and the Middle Eocene based on palynomorphs such as Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes, Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp.,Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Three (3) types of palynofacies including palynofacies 1 with dominant phytoclasts in which spores and pollen grains dominate, evoking a coastal environment in the Maastrichtian and Paleocene, a palynofacies 2 with phytoclasts and amorphous organic matter dominant in the Eocene deposited in a marginal marine environment and an amorphous organic dominant palynofacies 3 in the Upper Paleocene and Eocene indicating an inner to outer continental shelf environment

    Caractérisation Palynologique et Palynofaciologique de la Marge Est (Marge d’Abidjan) du Bassin Sédimentaire de Côte d’Ivoire

    Get PDF
    Des dĂ©pĂ´ts offshores localisĂ©s Ă  l’Est de la marge d’Abidjan (CĂ´te d’Ivoire) ont fait l’objet d’analyse palynologique et palynofaciologique. Elle Ă  portĂ© sur des dĂ©blais de forage Ă  partir desquels trente-deux (32) paires de lames minces palynologiques ont Ă©tĂ© confectionnĂ©es. L’objectif Ă©tait de mettre en Ă©vidence les Ă©tages du Tertiaire et la limite K-Pg par les palynomorphes stratigraphiques et de dĂ©terminer les environnements de dĂ©pĂ´t Ă  travers le palynofaciès. Cinq Ă©tages ont ainsi Ă©tĂ© mis en Ă©vidence. Ce sont le Maastrichtien supĂ©rieur, le PalĂ©ocène inferieur, le PalĂ©ocène supĂ©rieur, l’Eocène infĂ©rieur et l’Eocène moyen sur la base des palynomorphes tels que Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes,  Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Trois (3) types de palynofaciès dont le palynofaciès 1 Ă  phytoclastes dominants dans laquelle les spores et les grains de pollen dominent Ă©voquant un environnement littoral au Maastrichtien et au PalĂ©ocène, un palynofaciès 2 Ă  phytoclastes et matière organique amorphe dominant Ă  l’Eocène dĂ©posĂ© dans un milieu marin marginal et un palynofaciès 3 Ă  matière organique amorphe dominant au palĂ©ocène supĂ©rieur et Ă  l’Eocène indiquant un milieu de plateau continental interne Ă  externe.   Offshore deposits located to the East of Abidjan margin (CĂ´te d’Ivoire) have been the subject of palynological and palynofaciological analysis. It focused on drill cuttings from which thirty-two (32) pairs of palynological thin sections were made. The objective was to highlight the Tertiary stages and the K-Pg boundary by stratigraphic palynomorphs and to determine the deposition environments by palynofacies. Five stages were thus highlighted. These are the Upper Maastrichtian, the Lower Paleocene, the Upper Paleocene, the Lower Eocene and the Middle Eocene based on palynomorphs such as Cerodinium granulostriatum, Andalusiella mauthei, Andalusiella rhomboĂŻdes, Andalusiella polymorpha, Andalusiella gabonensis, Retitricolporites irregularis, Psilatricolporites sp., Laevigatosporites ovatus, Retistephanocolpites williamsii, Apectodinium homomorphum, Adnatosphaeridium multispinosum etc. Three (3) types of palynofacies including palynofacies 1 with dominant phytoclasts in which spores and pollen grains dominate, evoking a coastal environment in the Maastrichtian and Paleocene, a palynofacies 2 with phytoclasts and amorphous organic matter dominant in the Eocene deposited in a marginal marine environment and an amorphous organic dominant palynofacies 3 in the Upper Paleocene and Eocene indicating an inner to outer continental shelf environment

    Molecular diversity and antibiotic resistance gene profile of Salmonella enterica serovars isolated from humans and food animals in Lagos, Nigeria

    Get PDF
    Outbreaks of Salmonellosis remain a major public health problem globally. This study determined the diversity and antibiotic resistance gene profile of Salmonella enterica serovars isolated from humans and food animals. Using standard methods, Salmonella spp. were isolated from fecal samples, profiled for antimicrobial susceptibility and resistance genes. Seventy-one Salmonella isolates were recovered from both humans and food animals comprising cattle, sheep, and chicken. Forty-four serovars were identified, with dominant Salmonella Budapest (31.8%). Rare serovars were present in chicken (S. Alfort, S. Wichita, S. Linton, S. Ealing, and S. Ebrie) and humans (S. Mowanjum, S. Huettwillen, S. Limete, and S. Chagoua). Sixty-eight percent of isolates were sensitive to all test antibiotics, while the highest rate of resistance was to nalidixic acid (16.9%; n = 12), followed by ciprofloxacin (11.3%; n = 8) and tetracycline (9.9%; n = 8). Five isolates (7%) were multidrug-resistant and antimicrobial resistance genes coding resistance to tetracycline (tetA), beta-lactam (blaTEM), and quinolone/fluoroquinolone (qnrB and qnrS) were detected. Evolutionary analysis of gyrA gene sequences of human and food animal Salmonella isolates revealed variations but are evolutionarily interconnected. Isolates were grouped into four clades with S. Budapest isolate from cattle clustering with S. Budapest isolated from chicken, whereas S. Essen isolated from sheep and chicken was grouped into a clade. Diverse S. enterica serovars with high antibiotic resistance profile are ubiquitous in food animals; hence, there is a need for surveillance and prudent use of antibiotics in human and veterinary medicine
    corecore