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C1C2 Wiring and Posttraumatic Atlantoaxial Dislocation: An Effective and Cheap Surgical Procedure in a Developing Country

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Surgical Science 2024年第5期15卷 357-370页

作者： Ibrahim Dao Massimiliano Visocchi Salah Sow John Jabang Ousmane Ouattara astride somda Abdoulaye Sanou Elie Dibloni Nassoum Arsène Tossou Narcisse Ouedraogo Frédéric Bako Massadiami Soulama Malick Diallo Patrick Wendpouiré Hamed Dakouré Department of Neurosurgery University Hospital Souro Sanou Nazi Boni University Bobo Dioulasso Burkina Faso High Institute of Health Sciences Nazi Boni University Bobo Dioulasso Burkina Faso Military Hospital Colonel Major Tanguet Ouattara Bobo Dioulasso Burkina Faso Institute of Neurosurgery Craniovertebral Junction Surgery Unit School of Medicine Catholic University Rome Italy Department of Radiology and Medical Imaging University Hospital Yalgado Ouedraogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery (Unit) Edward Francis Small Teaching Hospital Banjul Gambia Department of Neurosurgery University Hospital Yalgado Ouedraogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery Military Hospital Capitaine Halassane Coulibaly Ouagadougou Burkina Faso Department of Orthopedic Surgery University Hospital Souro Sanou Nazi Boni University Bobo Dioulasso Burkina Faso

Objectives: Atlantoaxial dislocation remains a rare and serious condition with a high preoperative and postoperative morbidity and mortality. Its successful surgical management is still challenging and gratifying for neurosurgeons. Several technics have been described such as wiring, trans articular screwing, C1C2 screwing with plate and screw introduced by Goel et al., and modified by insertion of polyaxially screw and rod many years later by Harms. Unavailability and expensiveness of upper cervical spine instrumentation device led us to C1C2 Wiring resulting in a good outcome. Finally, a quadriplegic patient with a more comfortable financial condition had ordered devices from abroad and benefit for Goel and Harms screwing technique and improved dramatically from ASIA A to ASIA E. Material and methods: This is a retrospective study of patients managed in our department by a same neurosurgeon from January 2019 to April 2024. Results: We defined 6 men and 1 woman with an average age of 33 years. Unrestrained driver in a rollover motor vehicle accident was most common. Only one patient was neurologically intact on admission. Neurovegetative disorders were noticed in one patient. Dislocation was associated to a fracture of the dens in two patients. Three patients have been successfully operated with remarkable outcome, mostly from ASIA A to E. Conclusion: C1C2 dislocation is a serious condition and C1C2 Wiring represents an effective and cheaper technic. Therefore, this technic should deserve consideration above all in low incomes countries when screwing devices are not available. Seatbelt should be demanded for motor vehicle drivers and passengers.

关键词： Superior Cervical Spine Dislocation Fracture Wiring Screwing Neurovegetative Disorders

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Unusual Scalp Process Revealing a Thyroid Cancer: “Illustrative Case”

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Open Journal of Modern Neurosurgery 2023年第4期13卷 183-188页

作者： Ibrahim Dao Ademayali Franck Auguste Hermann Ido Abdoulaye Adamou Babana Abdoulaye Sanou Ousmane Ouattara Souleymane Ouattara astride somda Haoua Alzouma Sylvain Delwendé Zabsonré Abel Kabré Department of Neurosurgery Hospital Souro Sanou Higher institute of health sciences Nazi Boni University Bobo Dioulasso Burkina Faso Department of Pathology Hospital Tengandogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery Maradi Reference Hospital Dan Dikko Dan Koulodo University Maradi Niger Department of Neurosurgery Hospital Yalgado Ouédraogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso Department of Neurosurgery Niamey National Hospital Abdou Moumouni University Niamey Niger

Background: Thyroid cancers commonly display slow evolution with local and or regional extension. The classic presentation is a painless nodule of the thyroid region in a euthyroid patient. Sometimes, the nodule is discovered only on ultrasonography. Cervical lymph node is often seen in papillary thyroid cancer due to their propensity to invade lymph node. This means that follicular thyroid cancers are more insidious. Observation: We report a painless slow-growing lesion of the scalp revealing a skull metastasis of thyroid cancer. Despite catastrophic intraoperative bleeding, a total removal was achieved. Lessons: Thus, in addition to local and regional control in the management of thyroid cancers, distant metastasis should be surgically removed to provide the best chance to prolong the patient’s survival. Moreover, neurosurgeon must be prepared to deal with massive bleeding in skull metastasis of thyroid cancer.

关键词： Thyroid Cancer Follicular Thyroid Cancer Papillary Thyroid Cancer Subcutaneous Metastasis Surgery

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Soil Physico-Chemical Properties and Different Altitudes Affect Arbuscular Mycorrhizal Fungi Abundance and Colonization in Cacao Plantations of Cameroon

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American Journal of Plant Sciences 2024年第2期15卷 57-82页

作者： Franklin Tounkam Ketchiemo Beaulys Fotso astride Stéphanie Mouafi Djabou Victor Jos Eyamo Evina Japhet Youri Essambita Franck Maxime Ewane Tang Nicolas Niemenak Laboratory of Plant Physiology and Biochemistry Department of Biological Sciences Higher Teacher Training College University of Yaounde I Yaounde Cameroon Department of Plant Biology Faculty of Sciences University of Yaounde I Yaounde Cameroon Faculty of Agronomy and Agricultural Sciences Bafia Annex University of Dschang Dschang Cameroon Applied Biotechnology Engineering Laboratory Department of Agriculture and Agropastoral Higher Teacher Training College University of Ebolowa Ebolowa Cameroon Plant Physiology Improvement Unit Laboratory of Biotechnology and Environment Department of Plant Biology Faculty of Sciences University of Yaounde I Yaounde Cameroon

This study aims to investigate the abundance of AMF according to soil properties and altitudes in different cacao plantations of Cameroon. Physico-chemical analyses were made on soil samples collected from three agro-ecological zones. Soil samples were also used to evaluate directly the AMF abundance following the various altitudes and after trapping by sorghum plant. The results showed that soil properties, AMF spore abundances and colonization fluctuated significantly at different altitudes. The most represented texture was sandy loam. The bimodal zone presented a homogeneous texture (sandy loam) in all its localities. Cacao soil chemical characteristics showed that, the highest nitrogen rate (0.47%;p 0.05, Scott-Knott test) was recorded at Melong in a monomodal zone while Tonga in the Western highlands displayed the lowest rate (0.13%). Soil P concentration was significantly high in monomodal zones (Mbanga and Melong). Soil pH level indicated that the soil from Tonga in the Western highlands was neutral (pH = 6.67), and soils of other localities under study were acidic with the lowest (4.75) pH level recorded at Melong in a monomodal zone. In soil samples, the highest spore density (1.03 spores/g soil) was observed at Ntui in Bimodal zone, while the lowest spore density (0.26 spores/g soil) was observed at Bafang in the Western highlands. Root colonization showed that the sample from Bokito in a bimodal zone displayed the best frequency of mycorrhization (86.11%) while the sample from Bafang in the Western highlands recorded the lowest (27.11%). The PCA analysis highlighted that available phosphorus, pH and altitude all strongly correlated with AMF root colonization ability and can be used as a predictor of AMF colonization ability in cacao rhizosphere.

关键词： Agroecological Zone Altitude Variations Arbuscular Mycorrhizal Fungi Soil Properties Theobroma cacao

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Morphological Characterization of Arbuscular Mycorrhizal Fungi Associated with the Rhizosphere According to the Age of Xanthosoma sagittifolium L. Schott Plants in the Field

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American Journal of Plant Sciences 2024年第3期15卷 161-179页

作者： Audrey Maguy Bengono Nyimiebolo astride Carole Djeuani Hermann Désiré Mbouobda Antoine Marie Kevin Tiki Theresa Akinimbom Moma Diobe Motassy Manuela Samuel Brice Adounga Christophe Fendju Pangueko Jones Nshanji Issofa Nguetrapouna Rose Theophine Derricka Djem Moutamal A. Ziem Amang Amang Nicolas Niemenak Laboratory of Plant Physiology Department of Biological Sciences Higher Teacher Training College (HTTC) University of Yaoundé I Yaoundé Cameroon Department of Plant Biology Faculty of Sciences University of Yaoundé I Yaoundé Cameroon Department of Biology Higher Teacher Training College Bambili (HTTC) The University of Bamenda Bamenda Cameroon Departments of Microbiology Faculty of Science University of Yaoundé 1 Yaoundé Cameroon

The objective of this work was to carry out a morphological characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma sagittifolium L. Schott plants. The plant material used was the white and red cultivars of X. sagittifolium, belonging to age intervals of 3 - 6, 6 - 9, and 9 - 12 months. Three harvest sites were chosen in the Central Region of Cameroon. In each site, soil from the rhizosphere and plant roots was collected in a randomized manner. In the field, the agronomic parameters were evaluated. The physicochemical characteristics of the soils, the mycorrhization index, and the morphological characterization of the mycorrhizal types of each site were carried out. The results obtained show that the agronomic growth parameters varied significantly using the Student Newman and Keuls Test depending on the harvest sites. The soils’ pH in all sites was acidic and ranged between 4.6 and 5.8. The Nkometou site has a loamy texture while the Olembe and Soa sites have loam-clay-sandy and loam-clay textures respectively. The highest mycorrhization frequencies appeared at the Nkometou site, with 75 and 87.33% of the white and red cultivars plant roots at 6 - 9 and 3 - 6 months. The relative abundance of AMF arbuscular mycorrhizal fungal spores in the rhizosphere of X. sagittifolium plants varied with age and cultivar. There were 673 spores between 9 - 12 months in Nkometou in the red cultivar. Six AMF genera were identified in all the different soils collected: Acaulospora sp., Funneliformis sp., Gigaspora sp., Glomus sp., Scutellospora sp., and Septoglomus sp. The genus Glomus sp. was the most present at all age intervals in both cultivars.

关键词： Xanthosoma sagittifolium L. Schott Rhizosphere Harvest Site Arbuscular Mycorrhizal Fungi Diversity

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Strawberry (Fragaria spp.): Cultivation, Production, Consumption, and Marketing in Cameroon

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Agricultural Sciences 2024年第4期15卷 449-471页

作者： Djeuani astride Carole Moutamal Djem Rose Theophine Derricka Mbouobda Hermann Désiré Abdoulaye Souaibou Meliga Essimi Célestine Bouopda Nono Joël Anafack Donasson Dioril Messouang Bernard Didier Ndongo III Boris Charlen Kaffo Emmanuel Kamga Fossouo Anselme Xavier Tiki Antoine Marie Kevin Nyimiebolo Bengono Audrey Maguy Manuela Diobe Motassy Adounga Samuel Brice Amama Amama Benjamin Nshanji Jones Panguepko Fendju Christophe Nzie Oussena Nguetrapouna Issofa Mpon Ikoyin Linda NKouéya Christelle Ladone Amang Amang A. Ziem Niemenak Nicolas Laboratory of Plant Physiology and Biochemistry Department of Biological Sciences Higher Teachers&#8217 Training College University of Yaound&#233 1 Yaound&#233 Cameroon Department of Plant Biology Faculty of Science University of Yaound&#233 1 Yaound&#233 Cameroon Department of Biology Higher Teachers&#8217 Training College Bambili University of Bamenda Bamenda Cameroon Mbidjoro Sustainable Living Environment Ngaound&#233r&#233 Cameroon Cé r&#232s Agricole Yaound&#233 Cameroon KAFFO Farm Baham Cameroon Agro Ankh Dschang Cameroon Bio Farm of Lolodorf Lolodorf Cameroon Or Rouge d’ Afrique Obala Cameroon Bafoussam Farm Bafoussam Cameroon King Farms Baham Cameroon Department of Microbiology Faculty of Science University of Yaound&#233 1 Yaound&#233 Cameroon

Strawberry (Fragaria spp.) is one of the most important fruits classified as exotic fruits imported into Cameroon. To have an inventory of its cultivation in Cameroon, a survey study was carried out among eight farms of Fragaria spp. from January 2021 to February 2022. The plant was introduced in Cameroon in 2018. There are 13 varieties of Fragaria spp. currently cultivated. Among these 13 varieties, eleven are hybrids of Fragaria x ananassa (“Amiga”, “Amine”, “Camarosa”, “Chandler”, “Charlotte”, “Elsanta”, “Gariguette”, “Madame Moutot”, “Ostara”, “Ruby gem” and “San Andreas”), and two of the hybrids of Fragaria vesca (“Maestro” and “Mara des bois”). The cropping system, irrigation system, and type of fertilizers applied differ from one strawberry farm to another. Biofertilizers (such as mycorrhizal), inorganic and organic fertilizers are actually used to improve production. The potential annual production of strawberries from January 2021 to February 2022, estimated based on the survey data, was 21.216 tons for all growers. Among these eight production farms, the Lolodorf BIO Farm presents 6000 kg (six tons) of strawberries and 100,000 stolons (seedlings) produced, from seven varieties of Fragaria spp. cultivated, with 6 varieties which are hybrids variety Fragaria x ananassa (“Amiga”, “Amine”, “Chandler”, “Gariguette”, “Madame Moutot”, and “Ruby gem”), and one which is a hybrid of Fragaria vesca (“Mara des bois”). Certain diseases were also observed and recorded depending on the growing areas.

关键词： Fragaria spp. Cultivation Technique Attack of Pathogens Annual Production Cameroon

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Influence of Harvest Periods on Cassava (Manihot esculenta Crantz) Agronomic Traits and Physiological Response to Post-Harvest Physiological Deterioration

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American Journal of Plant Sciences 2023年第1期14卷 89-103页

作者： astride Stéphanie Mouafi Djabou Herman Pascal Kounty Ewane Victor Jos Evina Eyamo Franklin Tounkam Ketchiemo Priscila Gonzales Figueiredo Nicolas Niemenak Libert Brice Tonfack Faculty of Agronomy and Agricultural Science University of Dschang Dschang Cameroon Laboratory of Plant Physiology and Biochemistry Department of Biological Sciences Higher Teacher’s Training College University of Yaoundé I Yaoundé Cameroon Department of Plant Biology Faculty of Science University of Yaoundé I Yaoundé Cameroon Plant Physiology and Improvement Unit Laboratory of Biotechnology and Environment Department of Plant Biology Faculty of Science University of Yaoundé I Yaoundé Cameroon Applied Biotechnology Engineering Laboratory Department of Agriculture and Agropastoral Higher Technical Teacher Training College University of Ebolowa Ebolowa Cameroon Federal Institute of Education Science and Technology of Mato Grosso do Sul-Naviraí Mato Grosso do Sul Mato Grosso do Sul Brazil

Cassava (Manihot esculenta Crantz) is the third largest source of calories in tropical countries and the sixth most important food crop in the World. However, the short shelf life of its storage roots after harvest due to a rapid post-harvest physiological deterioration (PPD) makes the roots to be considered as a risky product to market. The objectives of this work were to investigate the influence of two harvest periods on cassava agronomic parameters and their physiological response to PPD. Three cassava cultivars 96/1414, I070593 and LMR were selected for the experiment and harvested at 10 and 12 months after planting (MAP). The response to PPD was assessed during storage at 0, 3, 8 and 15 days after harvest (DAH). Total proteins content, soluble sugars and starch, total polyphenols compounds, polyphenoloxidase and peroxidase activities were recorded during storage. Results showed large variation among the parameters at the two harvest periods across the cultivars. High number of tubers was recorded in all the cultivars at 12 MAP and a significant increase in storage roots length was observed in 96/1414 and LMR from 10 MAP to 12 MAP (25 ± 5.1 to 41.3 ± 5.9 and 22.6 ± 3.3 to 27.9 ± 4.8) respectively. A reduction of about 49% of tubers weight was observed in I070593 from 10 to 12 MAP while an increase of about 36% and 11% were recorded in LMR and 96/1414 respectively. Tubers from I070593 showed less susceptibility to PPD when harvested at 10 MAP compared to those from LMR and 96/1414 where less susceptibility to PPD were recorded at 12 MAP. An increase in soluble sugars content, total proteins content and peroxidase activity subsequently to a decrease in starch content were recorded during storage from 8 to 15 days after harvest especially at 10 MAP in I070593 and at 12 MAP in LMR and 96/1414. High content of total phenolic compounds and less activity of polyphenol oxidase were correlated to PPD susceptibility. This work opens a new insight issue of the considerati

关键词： Manihot esculenta Harvest Period Post-Harvest Deterioration Agronomic and Biochemical Parameters

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The Analysis of Cross-cultural Management of Chinese Multinational Enterprises in Guinea Bissau

The Analysis of Cross-cultural Management of Chinese Multina...

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作者： MIRANDA astride ANTONIO 华中师范大学

学位级别：硕士

Nowadays,any Chinese international companies enter the huge market by forming joint ventures or participating in mergers and *** has spurred the need for cross-cultural research all over the *** was reported that the great barriers caused by cultural differences like difficulty of communication,higher potential transaction costs,different objectives and means of cooperation and operating methods,have led to the failure of many cooperation *** questions like "how to understand foreign countries" and "how to do business with global people" have occupied the minds of international business people who are planning to enter the world *** paper presents an understanding on the general cultural differences by applying the cultural *** also discusses the impact of these cultural differences on their management *** paper is going to compare different cross-cultural management approaches and commend them in different situations to provide effective cross-cultural management approaches for those Chinese Multinational Enterprises in Guinea Bissau.

关键词： Cross-Cultural Management Cultural differences International Enterprises Globalization

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Knowledge of Nursing Staff on Postoperative Pain: The Case of the Laquintinie Hospital in Douala, Cameroon

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Journal of Biosciences and Medicines 2021年第5期9卷 120-131页

作者： astride Houmkoua Olivier Pancha Mbouemboue Ousmana Oumarou Henri Essome Emmanuel Balep Department of Biomedical Sciences The University of Ngaoundere Ngaoundere Cameroon Laquintine Hospital of Douala Douala Cameroon Faculty of Medicine and Pharmaceutical Sciences of Douala The University of Douala Douala Cameroon

Background and objective: Pain is a major concern in the surgical environment, but its management remains insufficient due to several factors related to the nursing staff, the organization of the structure or the patient himself. The objective of this study was to assess the knowledge of the nursing staff on postoperative pain at the Laquintinie Hospital in Douala. Methodology: This was a cross-sectional study carried out at the Laquintinie Hospital in Douala from September to December 2018. Participants were consecutively selected among members of nursing staff in charge of operated patients in the visceral surgery, trauma surgery, surgical reanimation, gynaecology and obstetrics services. Socio-professional data and data related to knowledge of postoperative pain were collected from this personnel using a pre-tested semi-structured questionnaire. Results: With regard to knowledge of postoperative pain, the proportion of correct answers to the knowledge questions was 61.4%. This proportion varied significantly with the specific training received on pain and the specialization of the nursing staff (p Conclusion: The results of the study reveal knowledge in this population that deserves to be improved with a view to better management of patients undergoing surgery.

关键词： Nursing Staff Postoperative Pain Knowledge

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Pelvic Multifocal Primitive Bone Epithelioid Angiosarcoma (Iliac Crest and Hip) about One Case and Literature Review

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Open Journal of Pathology 2017年第3期7卷 58-65页

作者： Samba Koné Abidou Coulibaly Nawe astride Ngandeu Kouadio J. N’dah Stanislas Touré Adoulaye Bana Serge Agoh N’zué Kouakou Traumatology Orthopaedics’ Ward Cocody’s UHC Abidjan Ivory Coast Rheumatology Ward Cocody’s UHC Abidjan Ivory Coast Anatomo-Pathologyward Cocody’s UHC Abidjan Ivory Coast

Epithelioid angiosarcoma is a rare vascular tumour with dark prognosis at short term. The primitive bone localization is exceptional and sometimes presents itself under a unifocal form. We report a clinical case of pelvic multifocal primitive bone epithelioid angiosarcoma (iliac crest and hip) diagnosed on a young male adult (45 years old). The radiological investigations put in evidence geographic osteolytic lesions (type IC) and, diagnostic was given thanks to the histological examination of the surgical biopsy pieces. The evolution was marked by the appearance of pulmonary and lymph node metastases with a death occurring in less than 4 months. Extremely rare tumour, bone epithelioid angiosarcoma is a variant of angiosarcoma characterised by an aggressive nature whose evolution is always fatal. Through this observation we report our experience on the diagnostic approach;and using a literature review we discuss the therapeutic modalities of this tumour with very bad prognosis.

关键词： Epithelioid Angiosarcoma Bone Primitive Multifocal

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耕作方式对土壤物理性状和木薯干物质分配的影响

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中国农机化学报 2020年第11期41卷 193-200页

作者： Priscila Gonzales Figueiredo Silvio JoséBicudo Songbi Chen Adalton Mazetti Fernandes F bio Yomei Tanamati astride Stéphanie Mouafi Djabou-Fondjo 杨雅婷圣保罗州立大学农业科学学院园艺生产和作物育种系博图卡图巴西18610-307 中国热带农业科学院热带作物品种资源研究所海南儋州中国571737 热带作物根茎作物研究中心博图卡图巴西18610-307 雅温得第一大学喀麦隆1664 农业农村部南京农业机械化研究所

保护性耕作可有效缓解土壤退化,但是也会影响土壤物理性质,使土壤板结,进而影响作物根系生长,因此木薯生产几乎不采用保护性耕作措施。本研究目的在于探索完整木薯生长周期内,不同耕作方式对木薯干物质分配(Dry material partitioning,D... 详细信息

保护性耕作可有效缓解土壤退化,但是也会影响土壤物理性质,使土壤板结,进而影响作物根系生长,因此木薯生产几乎不采用保护性耕作措施。本研究目的在于探索完整木薯生长周期内,不同耕作方式对木薯干物质分配(Dry material partitioning,DMP)变化的影响。本文对木薯种植后70 d、120 d、230 d、350 d,少耕(Minimum tillage,MT)、传统耕作(Conventional tillage,CT)、不耕(No-tillage,NT)3种耕作方式对土壤水分含量、土壤穿透阻力、大孔隙度、小孔隙度、总孔隙度的影响进行研究;同时,每30 d测定木薯植株中的干物质含量,直到360 d收获结束。结果表明,耕作方式对土壤穿透阻力、大孔隙度、小孔隙度和总孔隙度,以及木薯叶片、茎秆、根系和残留种茎中的干物质含量均有影响。种植后150~210 d之间,干物质分配变化显著,这正好对应了块茎膨大期后期和休眠期早期。不耕(NT)处理下作物的茎秆和残留种茎干物质含量最大。地上部分干物质与土壤穿透阻力呈正相关。传统耕作(CT)和少耕(MT)对块茎产量的影响没有差异,因此,考虑到耕作对土壤流失有一定的促进作用,少耕(MT)应当取代传统耕作(CT)。不耕(NT)处理提高了土壤的穿透阻力,阻碍了根系的生长,进而引起了木薯茎秆和残留种茎中的干物质积累明显高于根系中的干物质积累,使得茎秆和残留种茎表现出一定的碳水化合物储藏器官特性。

关键词：木薯少耕传统耕作不耕

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