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Petrostructural and Geochemical Characteristics of the Metamagmatites in the External Zone of the Dahomeyides Belt: Case of the KantèSerpentinites (Northern Togo)

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International Journal of Geosciences 2022年第9期13卷 779-792页

作者： mahaman sani Tairou Yougbare Mariette Wennegouda Miningou Yawoa Dzidzo Da Costa Maurice Kwekam Département de Géologie Faculté des Sciences Université de Lomé Lomé Togo Département des Sciences de la Terre Université Joseph KI-ZERBO Ouagadougou Burkina Faso Département des Sciences de la Terre Université de Dschang Dschang Cameroun

Thanks to detailed field investigations, microstructural and geochemical analysis and relationship with enclosing rocks, microfabrics, magmatic typology and metamorphic evolution of the Kantè sepentinites have been specified for the first time. The Kantè serpentinites in northern Togo constitute a mega-lens of ultrabasic rocks tectonically intercalated in the sericite chlorite schists of the Atacora structural unit. The brecciated, schitotose or massive rock facies are strongly marked by an S1 schistocity plane superimposed by a flat C shear plane linked to a west vergence thrusting movement. The parageneses that compose the metamagmatites are essentially serpentinous, containing plagioclase, opaque minerals (magnetite, chromite, spinel) and pyroxene porphyroblasts. These microfabrics represent relics of a probable gabbroic protolith. In fact, the geochemical characteristics of the Kantè serpentinites suggest that their magmatic typology is that of komatiites or tholeiitic basalts with oceanic arc affinities. They would have been emplaced in an active margin environment. The retromorphic evolution of the protolith corresponds to the phase of involvement in a major tangential contact during the panafrican tectogenesis.

关键词： Tectogenesis Microfabrics Serpentinites Panafrican Northern Togo

Congenital Depressed Skull Fracture Due to Maternal-Fetal Trauma

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Open Journal of Modern Neurosurgery 2021年第1期11卷 1-6页

作者： Diallo Moussa rabio. mahaman sani Tokpa André Ouattara Dramane Diallo Oumar Kanikomo Drissa Department of Neurosurgery University hospital of Gabriel Touré Bamako Mali Department of Neurosurgery National Hospital of Zender Zender Niger Department of Neurosurgery University Hospital of Bouaké Cote d’Ivoire Department of Neurosurgery Hospital of Mali Bamako Mali

The fetal head trauma is rare and seen in pregnant road accidents and during extractive maneuvers during childbirth. We have reported a case of congenital depressed skull fracture due to an innocuous fall from her own height of a pregnant of 35 weeks of amenorrhea. The diagnosis was made at birth, by vaginal delivery, by the discovery of a left frontal depressed skull fracture without neurological disorder. A surgical lifting of the drepressed skull fracture was made at the 2nd day of life. Outcome was good marked by a normal psychomotor development.

关键词： Fetus Head Trauma Skull Depressed Fracture

Petrology, Age and Geodynamic Implication of the Panafrican Granitoids Associated with the Glito-Kpatala Shear Zone (South-East Togo)

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International Journal of Geosciences 2023年第12期14卷 1193-1225页

作者： Gnanwasou Alayi Sarakawa Abalo Malibida Kpanzou Yao Agbossoumondé Essodina Padaro René-Pierre Menot mahaman sani Tairou Départment de Géologie Faculté des Sciences Université de Lomé Lomé Togo Laboratoire Magmas et Volcans Université Jean Monnet Saint Etienne France

The granitic plutons associated with the Glito-Kpatala shear zone are composed of biotite and amphibole granodiorites, biotite granites, two-mica granites and aplitic granites, which are very poorly represented. The chemical and mineralogical compositions of these facies indicate that they are I type and belong to high-K calc-alkaline series, with a chemical metaluminous character displayed by the granodiorites relative to the biotite and two-mica facies whose chemical compositions vary between metaluminous and peraluminous caracter. The Th/Ta (14.04 - 43.82 ppm, mean = 26.05), Th/U (2.58 to 15.05 ppm, mean = 5.85 ppm), Zr/Hf (25.27 to 37.21, mean = 30.67 ppm) and Rb/Sr (0.16 to 4.32;mean = 1.67 ppm) ratios of these granitoids reveal a strong crustal involvement in their magmatogenesis. Variations in CaO/Na2O (0.47 - 1.44 ppm), Rb/Sr (0.14 - 0.27 ppm), Rb/Ba (0.07 - 0.14 ppm) and Sr/Y (38.21 - 174.42 ppm) ratios indicate that biotite and amphibole granodiorites with their excessive Ni (135.37 - 139.51 ppm) and Cr (395.73 - 447.74 ppm) were derived from a mafic to intermediate lower continental crust where garnet and/or amphibole were stable residual assemblage minerals. The moderate Sr/Y ratios (1.81 - 9.47 ppm) and low transition elements Ni (1 - 6.44 ppm) and Cr (7.89 - 13.47 ppm) contents in both the two-mica and biotite granites are consistent with their emplacement at relatively shallow depths in the upper to mean continental crust, at pressures below 10 Kbar. In the two-mica granites, moderate CaO/Na2O (0.20 - 0.57 ppm, mean = 0.38 ppm) and Rb/Ba (0.39 - 1.37, mean = 0.84 ppm) ratios and quite varied Rb/Sr (1.53 - 4.23 ppm, mean = 2.85 ppm) ratios indicate a predominant derivation from psammitic and pelitic metasediments rather than metagreywackes. These low ratios (0.25 ≤ CaO/Na2O ≤ 0.32, mean = 0.28 ppm;0.31 ≤ Rb/Ba ≤ 0.44, mean = 0.39 ppm;1.11 ≤ Rb/Sr ≤ 1.78, mean = 0.39 ppm) in biotite granites are more consistent with melt

关键词： Pan-African Granitoids Post-Collisional Shear Zone South-East Togo

Jackstone Caliciel Complicating a Kidney Cyst: Clinical Case and Literature Review

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Open Journal of Urology 2024年第10期14卷 514-518页

作者： Oumarou Karimoune Mossi Soumana Amadou Mamane sani Ousmane Manzo mahaman Salissou Adamou Kaka mahaman Salissou Dambaki Abdoul-Kadri Moussa Yahouza Boka Tounga Department Urology National Hospital Amirou Boubacar Diallo Niamey Niger Department Radiology National Hospital Amirou Boubacar Diallo Niamey Niger

The jackstone is a rare type of urinary stone, recognized for its distinctive shape. While historically described in veterinary pathology, it has also been found in humans, most commonly in the bladder and typically associated with urinary stasis. However, its occurrence in the renal calyx is extremely rare. We report a case of a jackstone located in the renal calyx, secondary to a large Bosniak 1 renal cyst. The simultaneous presence of the calyceal stone and renal cyst prompted us to opt for open surgery, allowing for comprehensive treatment of both conditions. The patient’s postoperative recovery was smooth, demonstrating that despite its invasiveness, open surgery remains a relevant option for managing complex stones, particularly in resource-limited settings.

关键词： Jackstone Renal Lithiasis Renal Cyst Nephrolithotomy

Neurological Sequelae in Cranioencephalic Trauma Patients at the National Hospital in Zinder (Niger)

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Open Journal of Modern Neurosurgery 2022年第2期12卷 104-115页

作者： mahaman sani rabio. Abd-el Kader Moumouni Abiba Tamou Tabe Essosinam Kpelao Stackys Hounkpatin Moussa Taofik Abdoulaye Adamou Babana Dede Regine Diane Ajavon Aminata Kelani Soumaila Sanoussi Depetement of Neurosurgery Zinder Hospital Zinder Niger Department of Neurosurgery Kara University Hospital Center KaraTogo Depeartment of Radiology Kara Regional Hospital Center Kara Togo Department of Neurosurgery Syvanus Olympio University Hospital Center Lome Togo Depetement of Traumatology Zinder Hospital Zinder Niger Department of Neurosurgery Maradi Niger Reference Hospital Maradi Niger Faculty of Health Sciences University of Kara Kara Togo Depetement of Neurosurgery CHU Niamey Niamey Niger

Introduction: Cranioencephalic trauma is a frequent reason for admission to emergency departments and is a source of mild to severe neuropsychological defects that will persist over time. Their management remains difficult. Objectives: To evaluate the sequelae presented by patients suffering from cranioencephalic trauma. Methods: This was a retrospective, descriptive, cross-sectional study conducted at the National Hospital of Zinder. It will include all patients admitted and hospitalised in the emergency, intensive care and neurosurgery departments of Zinder National Hospital for head injury over a period of 28 months from 1 January 2016 to 30 April 2018. Brain scan, X-ray were the imaging tests used. Results: Out of a total of 974 admissions, 367 were retained, i.e. 37.6%, with a male predominance (82.6%). The average age was 26.5 years. MVAs were represented in 89.7% of cases. Moderate CTE accounted for 64% of cases. Altered consciousness was reported in 295 patients (80.38% of cases). Brain scans were used in 76.7% of cases and skull X-rays in 4.2% of cases. Medical management was performed in all patients. Treatment was operative in 78 patients (21.25%). Recovery without immediate sequelae was found in 187 patients (50.9%). Persistent headache represented 47.7% of the late sequelae observed in the patients, epileptic seizures represented 16.8% of the late sequelae, neurological deficit represented 14.7%. Conclusion: Cranioencephalic trauma represents a major public health issue. Although their in-hospital management remains a challenge, post-hospital management related to the appearance of sequelae remains another.

关键词： Cranioencephalic Trauma CT Scan X-Ray Sequelae Niger

Prevalence of Extended-Spectrum Beta-Lactamase-Producing Strains Isolated at Zinder National Hospital (ZNH) in 2021 and Their Antibiotic Susceptibility Profile

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Open Journal of Medical Microbiology 2023年第1期13卷 43-51页

作者： Maman sani Falissou Saïdou Abdoulaye Ousmane Abdoulaye Inoussa Abdoulaye Maman Bachir Hassane Boureima Lo Gora Alhousseini Maiga Daouda Doutchi Mahamadou Bako Saley mahaman Laouali Sidi Maman Bacha Boukar Mamadou Saidou Faculté des Sciences de la Santé Université Dan Dicko Dankoulodo de Maradi Maradi Niger Hôpital National de Zinder Zinder Niger Centre de Recherche Médicale et sanitaire Niamey Niger Faculté de Médecine de Pharmacie et d’odontostomatologie Université Cheikh Anta Diop de Dakar Dakar Sénégal Faculté des Sciences de la Santé Université Abdou Moumouni Niamey Niger Faculté des Sciences de la Santé Université de Zinder Zinder Niger

Purpose: Bacterial resistance to antibiotics has become a global public health problem. Enterobacteriaceae ESBL is among the most incriminated in this emergence which reduces the therapeutic possibilities. Thus, the objective of this study is to determine the prevalence of the extended-spectrum beta- lactamase (ESBL) producing Enterobacteriaceae at ZNH and their antibiotic susceptibility profile. Materials and Methods: This is a prospective study carried out over 5 months in all hospitalized and non-hospitalized patients in whom a culture was taken for the diagnosis of an infection. The search for ESBL is done by the double disc diffusion method. Results: In total, 21 out of 45 of our strains are ESBL-producing, i.e. a frequency of 46.7%. The mean age is 41.62 (±22.90) with extremes of 2.6 - 78 years. The distribution of ESBL producing species showed a predominance of E. coli with 66.7% followed by K. pneumoniae and K. oxytoca each 9.5%. All ESBL strains were resistant to Amoxicillin, Cefalotin, Pipiracillin, Piperacillin + tazobactam, Ticarcillin, Ticarcillin + clavulanic acid. Resistance to C3G and Aztreonam was each 95.5%, to Amoxicillin/clavulanic acid 9.1%. All strains were sensitive to imipenem. E. coli strains showed resistance: 85.7% to ciprofloxacin, 50% to Amikacin, 57.1% to Gentamicin. For K. pneumoniae, it is 66.7% for Gentamicin and Ciprofloxacin. Conclusion: Our study reports a high prevalence of ESBL at the HNZ. This must be taken into account in order to monitor this phenomenon which constitutes a public health problem. The study also reports sensitivity to Amoxicillin/clavulanic acid and Aminoside which can be an alternative.

关键词： Bacterial Resistance ESBL Enterobacteriaceae Zinder Niger