Exogenous proline mediates alleviation of cadmium stress by promoting photosynthetic activity, water status and antioxidative enzymes activities of young date palm (Phoenix dactylifera L.).

The ability of exogenous compatible solutes, such as proline, to counteract cadmium (Cd) inhibitory effects in young date palm plants (Phoenix dactylifera L. cv Deglet Nour) was investigated. Two-year-old date palm plants were subjected for five months at different Cd stress levels (0, 10 and 30 mg CdCl2 kg(-1) soil) whether supplied or not with exogenous proline (20mM) added through the irrigation water. Different levels of Cd stress altered plant growth, gas exchanges and chlorophyll content as well as water status, but at different extent among them. In contrast, an increase of antioxidant enzymes activities of Cd-treated plants in association with high amounts of proline content, hydrogen peroxide (H2O2), thiobarbituric acid reactive substances (TBARS) and electrolyte leakage (EL) were observed. Interestingly, exogenous proline mitigated the adverse effects of Cd on young date palm. Indeed, it alleviated the oxidative damage induced by Cd accumulation and established better levels of plant growth, water status and photosynthetic activity. Moreover, proline-treated plants showed high antioxidant enzymes activities (superoxide dismutase, catalase and glutathione peroxydase) in roots and leaves as compared to Cd-treated plants.

Soil fluoride spiking effects on olive trees (Olea europaea L. cv. Chemlali).

A pot experiment under open air conditions was carried out to investigate the uptake, accumulation and toxicity effects of fluoride in olive trees (Olea europaea L.) grown in a soil spiked with inorganic sodium fluoride (NaF). Six different levels (0, 20, 40, 60, 80 and 100mM NaF) of soil spiking were applied through NaF to irrigation water. At the end of the experiment, total fluoride content in soil was 20 and 1770mgFkg(-1) soil in control and 100mM NaF treatments, respectively. The comparative distribution of fluoride partitioning among the different olive tree parts showed that the roots accumulated the most fluoride and olive fruits were minimally affected by soil NaF spiking as they had the lowest fluoride content. In fact, total fluoride concentration varied between 12 and 1070µgFg(-1) in roots, between 9 and 570µgFg(-1) in shoots, between 12 and 290µgFg(-1) in leaves, and between 10 and 29µgFg(-1) in fruits, respectively for control and 100mM NaF treatments. Indeed, the fluoride accumulation pattern showed the following distribution: roots>shoots>leaves>fruits. On the other hand, fluoride toxicity symptoms such as leaf necrosis and leaf drop appeared only in highly spiked soils (60, 80 and 100mM NaF).

Non-resectable pulmonary alveolar echinococcosis with multi-stage vertebral location.

Alveolar echinococcosis (also known as Hydatid cyst or Hydatydosis) is a zoonosis with a high degree of disability and morbidity. Bone echinococcosis is a rare presentation. Authors are always defending a personalized approach taking account of the particularities of the cyst location. Recognition of this syndrome is crucial because advances in medical and surgical management strategies have controlled and relieved symptoms in numerous cases. We report, hereby, a case of a patient with a thoracic spine alveolar echinococcosis of an unusual extension. We discussed the outcome of the treatment after fifteen years of follow-up.

[Level of knowledge on occupational asthma and asthmagens: Assessment among healthcare workers by a validated questionnaire]. / Niveau de connaissance sur l'asthme professionnel et les agents asthmogènes : évaluation auprès du personnel de santé par un questionnaire validé.

INTRODUCTION: The health system is one of the professional sectors perhaps most at risk of occupational asthma. The aims of this study were to evaluate the level of knowledge of health care workers (HCWs) on occupational asthma and asthmogenic agents and to pave the way to effective educational action on the subject. METHODS: A multicenter transversal study including 180 HCWs was carried out between July and December 2020. A validated questionnaire addressed four dimensions: knowledge of asthmatic disease, knowledge of occupational asthma, knowledge of prognosis of occupational asthma and knowledge on the prevention of occupational asthma. RESULTS: The average total score was 13.71/18 (76.17%). There was no correlation between average total score and age, educational level, seniority or status of paramedical staff. Mean total scores were significantly higher for participants with no fixed work schedule and those practicing in non-university structures. The difficulty indexes for the four aforementioned dimensions were 82.22%, 77.56%, 53.52% and 66.67% respectively. CONCLUSIONS: Knowledge gaps affect all professional categories but to different degrees. A review of the level of knowledge of persons in each category would be the first step on the road to planned educational action.

Antioxidant supplementations in vitro improve rat sperm parameters and enhance antioxidant enzyme activities against dimethoate-induced sperm damages.

Organophosphorus compounds are currently among the most frequently used pesticides worldwide, and therefore, the potential for human exposure to man is considerable. Their toxicity results in negative effects on many organs and systems such as the male reproductive system. So, vitamins that can offer spermatozoa protection are of great importance. This study was designed to investigate (i) the possibility of dimethoate, an organophosphate insecticide, to induce oxidative stress response in rat spermatozoa in vitro and its effect on antioxidant defence system and (ii) the role of vitamin C and vitamin E in alleviating the cytotoxic effects of dimethoate Epididymal spermatozoa were incubated for 3 h at 37 °C with different concentrations of dimethoate (50, 100 and 200 µm) without vitamins or pre-incubated with 20 mm of vitamin C or 2 mm of vitamin E. Sperm parameters, malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) levels were performed. Dimethoate caused a significant induction of oxidative damage in spermatozoa at different concentrations as evidenced by increased MDA levels. However, a significant decrease in sperm mobility, viability and activities SOD, CAT and GPx was observed. Vitamins pre-treated spermatozoa showed a significant protection against the cytotoxic effects induced by dimethoate on studied parameters.

Embryonic exposure to dimethoate and/or deltamethrin impairs sexual development and programs reproductive success in adult male offspring mice.

Pesticides can be toxic to desirable plants and animals, including humans. The aim of this study was to investigate the reproductive effects of low doses of pesticides on male offspring of exposed pregnant mice. Three groups of five female mice were treated daily by oral gavage with dimethoate (5 mg kg(-1) per day), deltamethrin (5 mg kg(-1) per day) and their mixture at 5 mg kg(-1) per day from day 3 to day 21 of pregnancy. Fertility, sexual behaviour and a number of reproductive endpoints, such as organ weights, sperm evaluations and testicular histology, were examined on four adult male offspring of exposed pregnant mice. When compared with control, a dose of deltamethrin 5 mg kg j(-1) causes a decrease in the absolute and relative weight of the testes of exposed mice and it affects their fertility by reducing the density, mobility and vitality of sperm and increasing the number of abnormal forms of these cells (P ≤ 0.01). The same results were obtained in mice exposed to a dose of 5 mg kg j(-1) combination of dimethoate and deltamethrin. This study demonstrated that deltamethrin and combination of dimethoate and deltamethrin caused a decrease in the absolute and relative weight of the testes, which affected the sperm parameters of male offspring of exposed mice to a low dose of these pesticides during pregnancy.

Antioxidative potential of Quercetin against hydrogen peroxide induced oxidative stress in spermatozoa in vitro.

This study was carried out to test the antioxidant effects of Quercetin on sperm parameters and antioxidant enzymes in male rats assessed in vitro after H(2) 0(2) -mediated sperm oxidative damage. Spermatozoa were incubated with Quercetin (10, 100 and 200 µm), H(2) O(2) alone (100 µm) and Quercetin (100, 200 µm) + H(2) O(2) (100 µm) repectively, for 3 h at 32 °C. After that, sperm parameters (motility, viability and abnormal morphology), malondialdehyde, superoxide dismutase, catalase and glutathione peroxidase levels were determined. We found that exposure to H(2) O(2) let to significant increase in lipid peroxidation (LP) and abnormal morphology associated with significant decrease in sperm motility, viability and antioxidant enzymes activities. When Quercetin was added in culture medium, it improved activities of antioxidant enzymes and protected spermatozoa against the deleterious effect of H(2) O(2) on sperm parameters and LP. This study demonstrated that supplementation with Quercetin could protect spermatozoa against H(2) O(2) -mediated sperm damage.

Isolated Persistent Left Superior Vena Cava Revealed by an Associated Asthma.

BACKGROUND: Persistent left superior vena cava (PLSVC) is a rare anomaly of the thoracic venous system. Case Report. We present a case of a patient with isolated asymptomatic PLSVC, who was diagnosed because of dyspnea revealing an associated asthma. An 18-year-old male patient complained of paroxystic sibilant dyspnea. He did not have any anomaly in physical examination. The chest X-ray revealed cardiomegaly with a widening of lower mediastinum. The electrocardiogram does not show any anomaly. Echocardiography showed the PLSVC. The thoracic contrast computed tomography of the chest showed ecstasies of the right cardiac cavities and a double superior vena cava. The patient did not have similar family cases. Respiratory functional explorations led to the diagnosis of an associated asthma. Currently, he is followed up periodically. Asthma was improved with inhaled corticosteroid treatment. CONCLUSION: PLSVC is rare but can have important clinical implications. Associated severe cardiac malformations must be systematically sought.

A Delicate Surgical Resection to Treat a Proximal Pulmonary Adenoid Cystic Carcinoma.

Pulmonary adenoid cystic carcinoma (PACC) is an exceedingly rare tumor of low-grade malignancy. Diagnosis is often late, so the tumoral process may be huge at presentation. Surgical resection could be challenging, and the recurrence rate would be greater. We report, hereby, a case of proximal PACC with involvement of the carina in a young male adult, without respiratory distress. Surgical resection was performed through a left pneumonectomy followed by a complex trachea-bronchoplastic procedure. During the operative time, the assisted ventilatory mode was carefully chosen. No adjuvant treatment was needed. Our patient is still under clinicoradiological surveillance and remains disease-free.

Comparison of Sleep Quality before and after Chemotherapy in Locally Advanced Nonsmall Cell Lung Cancer Patients: A Prospective Study.

BACKGROUND: Preservation of sleep quality is a modifiable and treatable factor, which may enhance the patient's adherence to other supportive and palliative care procedures. The outcome of sleep disturbances in lung cancer patients before and after treatment aren't reported. The aim of this study was to investigate changes in sleep quality before and after chemotherapy in locally advanced or metastatic NSCLC patients. METHODS: It was a prospective study including 64 patients with stage III or IV nonsmall-cell lung cancer. Patients answered the Tunisian dialectal version of the following questionnaires: PSQI and QLQ-C30 in order to evaluate, respectively, the sleep quality and the quality of life. The assessments took place before chemotherapy and then repeated after the chemotherapy course was over. RESULTS: The mean age was 62.9 years. All patients were active smokers. Before chemotherapy, there were 10 patients (15%) with poor sleep quality. The most frequent complaints were daytime sleepiness (70%) and nocturnal arousals (100%). After chemotherapy, the mean PSQI score increased from 2.9 to 5.4, and 45% of all patients had poor sleep quality. Most frequent complaints were the extension of sleep latency (69%), daytime sleepiness (98%), and nocturnal arousals (100%). Predicting factors of sleep disturbance according to statistical univariate analysis were delayed diagnosis confirmation (p = 0.05), delayed treatment onset (p < 10-3), depressive mood (p = 0.001), and anxious mood (p = 0.001). Multivariate analysis had shown a significant and independent correlation between sleep quality and shortened diagnosis and treatment delays. Sociodemographic parameters, clinical parameters, and factors related to treatment procedure had no correlation with sleep quality. CONCLUSIONS: Our study demonstrates the persistence and potential intensity worsening of sleep disturbances in advanced stage nonsmall-cell lung cancer patients. We, hereby, reported a statistical correlation between sleep quality and quality of life in our patients.

[A questionnaire assessing knowledge level concerning occupational asthma]. / Questionnaire d'évaluation du niveau de connaissances sur l'asthme professionnel.

INTRODUCTION: Screening for occupational asthma is should still be promoted. In order to improve the efficiency of any educational intervention we need to evaluate the patient's knowledge of the disease. OBJECTIVES: The aims were to evaluate objectively the knowledge level of Tunisian asthmatic patients concerning occupational asthma using a self-questionnaire in Arabic Tunisian dialect, then to conduct a validation process of the questionnaire. METHODS: We followed De Vellis's rules during all stages of redaction of the self-questionnaire. It contained 18 items allocated in 4 dimensions: knowledge about asthma; knowledge about occupational asthma; prognosis of occupational asthma; prevention of occupational asthma. A pre-test was conducted on 18 asthmatic patients to assess the clarity and comprehensibility of all the questions. The questionnaire was then applied to 107 asthmatic patients. RESULTS: The statistical analysis proved the discrimination value in 14 of the 18 items. The internal consistency of the questionnaire was demonstrated by a KR20 index of 0.731. Factorial analysis of the principal components showed the reliability of the questionnaire and of its uni-dimensional structure. The statistical findings proved the positive correlation between the mean scores of all its dimensions. CONCLUSIONS: Using this questionnaire in daily practice should inform health care providers about the level of knowledge of occupational asthma in the targeted population and improve the effectiveness of any further educational intervention.

Effects of date seed oil on testicular antioxidant enzymes and epididymal sperm characteristics in male mice.

The aim of this study was to evaluate the effect of date seed oil (DSO) on epididymal sperm characteristics and testicular antioxidant enzymes in male mice. DSO was diluted into isotonic saline solution (0.9%) and different doses (5, 10, 15 and 20%) were prepared. Fifty male mice were divided into five groups; in four groups DSO was given by intraperitoneal injection of oil solution for 28 days. The control group was injected by isotonic saline solution without DSO. Body and reproductive organ weights, sperm characteristics (count, motility, viability and morphology) were assessed. In addition, levels of malondialdehyde (MDA), activities of superoxide dismutase (SOD) and catalase (CAT) were investigated in testes. A significant increase in sperm count, motility and viability of all treated animal groups was observed when compared with the control group (P < 0.05). Unlike, the percentage of abnormal sperm was significantly lower in all treated groups than in the control group (P < 0.05). A significant decrease in MDA levels and marked increase in SOD and CAT activities in mice treated with high doses of DSO (15 and 20%) were also noted. We suggest that DSO can improve the epididymal sperm quality and could ameliorate the testicular strategy defences.

[Unusual presentation of pulmonary alveolar proteinosis]. / Lipoprotéinose alvéolaire pulmonaire de présentation inhabituelle.

Pulmonary alveolar proteinosis is a rare disease characterized by the accumulation of granular lipoproteinaceous material within the alveoli; the interstitium is preserved. We report the case of a 27-year-old patient hospitalized for exploration of asymptomatic bilateral interstitial syndrome. Neither the radiographic signs nor the aspect of bronchoalveolar lavage was typical. The diagnosis was confirmed by pathology examination of surgical lung biopsy specimen which revealed lesions of interstitial fibrosis and cholesterol granulomas in association with pulmonary alveolar proteinosis. Since there was no functional deterioration, therapeutic abstention was decided.

[Treatment and prognosis of advanced stage non-small-cell lung cancer]. / Traitement et pronostic du cancer bronchique non à petites cellules au stade avancé.

INTRODUCTION: Lung cancer is the main cause of death from cancer in both men and women worldwide. In 70 to 80% of cases, the diagnosis is made at an advanced stage. Although the management of non-small-cell lung cancer (NSCLC) has continued to improve over the last 5 years, the prognosis remains poor with a 5-year survival rate of about 16%. The aim of this study was to evaluate the management of locally advanced or metastatic NSCLC in our patients and to analyze overall survival (OS) and prognostic factors at these stages. MATERIALS AND METHODS: A retrospective study, including cases of locally advanced and metastatic NSCLC diagnosed in our department between 2008 and 2011. RESULTS: We included 150 patients with a mean age of 60.2 years. The cancer was at stage IIIA in 21% of cases, IIIB in 14% of cases and IV in 65% of cases. Thoracic surgery was performed in 5 patients; 61.4% of patients received chemotherapy and chemo-radiotherapy was given in 21% of patients. Overall survival was 6 months. Better survival was observed in patients aged less than 60 years, having better performance status (PS), having no metastatic mediastinal lymph nodes and patients who received specific anti-tumor treatment. CONCLUSIONS: The prognostic factors in locally advanced and metastatic NSCLC in our patients were: age, PS, status of mediastinal lymph nodes at diagnosis and treatment. These factors should be considered by physicians when treating patients with advanced stage NSCLC.

[Sternal tuberculosis causing spontaneous fracture of the sternum]. / Tuberculose sternale avec fracture spontanée du sternum.

Sternal tuberculosis is an uncommon condition. Few cases have been reported. We report the case of a 74-year-old man, presented with a swelling and pain of the anterior chest wall associated to worsening of general state. All routine investigations were normal. Chest radiograph in lateral view showed sternal and chest wall hypertrophy with spontaneous fracture of the sternum. Computed tomography (CT) scan demonstrated ring-enhancing hypodense soft tissue mass surrounding the sternum with sternal fracture. Tuberculosis diagnosis was confirmed by histological study of the mass biopsy. We noted clinical and radiological recovery with medical tuberculosis treatment.

Burden of Chronic Respiratory Diseases (CRD) in Middle East and North Africa (MENA).

Chronic respiratory diseases involve a heterogenous group of diseases, including, chronic obstructive pulmonary disease (COPD), asthma, sleep apnea syndrome, pulmonary hypertension, and many occupational diseases. They affect more than one billion people worldwide. Their medical, social, and economic impacts are heavy, especially in developing countries such as Middle East and North Africa countries, where they represent a public health problem. They are essentially represented by COPD, asthma, and allergic diseases. Chronic respiratory diseases are increasing in frequency, morbidity, and mortality. In addition, their economic and social impact is increasing rapidly in this region. Main risk factors are represented by tobacco smoking and exposure to biomass fuel. Smoking prevention and standardized management programs for asthma and COPD are now available but prompt actions are needed to make them more effective in this region and thus avoid an adverse impact on national economic development.

[Solitary malignant fibrous tumors of the pleura]. / Les tumeurs fibreuses solitaires malignes de la plèvre.

Solitary fibrous tumours of the pleura are usually benign. However, malignancy is observed in 13% of the cases. The authors report two cases of 27 and 69 year-old patients, presenting chest pain and dyspnoea. The roentgenograms and computed tomography scanning revealed a pleural tumour in both cases. The patients underwent complete resections of these tumours. The immunohistochemical study confirmed the diagnosis of malignant solitary pleural fibroma. The patients succumbed to their disease secondary to local recurrences. Histopathology is very helpful in the diagnosis of malignant pleural fibroma. Surgery and long-term follow-up are mandatory.

Multiplex PCR detection of the antibiotic resistance genes in Staphylococcus aureus strains isolated from auricular infections.

Thirty-five Staphylococcus aureus strains from auricular infections were isolated. The identification of strains was confirmed by Api ID 32 Staph strips, the antibiotic susceptibility test was performed using ATB Staph kit. PCR assay was used to detect the oxacillin resistance gene (mecA) and the erythromycin genes (ermA, ermB, ermC, msrA and mef). The susceptibility profile of all strains revealed a low resistance level to oxacillin and erythromycin. The PCR results show that 60 % of the strains are mecA positive. The frequency of erythromycin genes was: ermA (+) 22.8 %, ermB (+) 45.7, ermC (+) 17.1, msrA (+) 28.6. The mef gene was not detected in any strain. No correlations between genotypic and phenotypic methods for the determination of oxacillin and erythromycin resistance was found. However, multiplex PCR technique was shown to be a fast, practical and economic technique for the detection of methicillin-and erythromycin-resistant staphylococci.