Publications by authors named "Chehida F"

Background: Neither radiological phenotypic characteristics nor reconstruction CT scan has been used to study the early anatomical disruption of the cranial bone in children with the so-called idiopathic type of West syndrome.

Material And Methods: The basic diagnostic measures and the classical antiepileptic treatments were applied to these children in accordance with the conventional protocol of investigations and treatment for children with West syndrome. Boys from three unrelated families were given the diagnosis of the idiopathic type of West syndrome, aged 7, 10 and 12 years old.

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  • The study focuses on diagnosing and characterizing ectodermal abnormalities in children, particularly those with various skin and cranial-skeletal malformations.
  • Eight girls, ranging from infants to 16 years old, exhibited symptoms like cleft palates, abnormal teeth, and limb deformities, alongside notable skin lesions.
  • Imaging techniques including 3D CT scans revealed significant cranial demineralization and other skeletal defects, leading to a diagnosis of Goltz syndrome, which was linked to mutations in the PORCN gene in some of the affected children.
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Background: Omitting the early closure of the cranial sutures in newly born children is not an uncommon practice. We describe the natural history of several unrelated children and adults from two unrelated families. These children were born with variable clinical manifestations: craniofacial asymmetry, ocular proptosis, floppiness, and progressive deceleration in cognitive development.

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  • - The study focused on detecting Shiga-toxin-producing E. coli O157:H7 in diarrheic camels in Tunisia, collecting 120 fecal samples between January 2018 and April 2019.
  • - Out of 70 E. coli isolates, 4 (5.7%) were identified as STEC O157:H7, with key genes for virulence and antibiotic sensitivity tests revealing their resistance patterns.
  • - This research marks the first finding of E. coli O157:H7 in camels in Tunisia, emphasizing the need for regular screening programs in food-producing animals to manage foodborne pathogens effectively.
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Background: We describe patients who were recognized via conventional radiographs of the skull as manifesting wormian bones. Wormian bones are not a specific diagnostic entity and can be seen in variable forms of syndromic disorders.

Materials And Methods: Seven children and three adults (of 10-28 years) were seen and diagnosed in our departments.

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A long list of syndromic entities can be diagnosed immediately through scrutinizing the clinical phenotype of the craniofacial features. The latter should be assisted via proper radiological interpretations. Different children aged from 1 month to 12 years were referred to our departments seeking orthopedic advice.

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  • * A total of 236 E. coli isolates were tested, revealing that 4.2% were positive for the O157:H7 strain, and many isolates exhibited various virulence factors associated with this pathogen.
  • * The findings indicate that E. coli O157:H7 is present in healthy cattle, suggesting a potential risk for food-borne diseases in humans, highlighting the importance of monitoring this pathogen in the food supply.
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  • Antimicrobial resistance (AMR) is a growing global health issue, with limited research in Tunisia specifically concerning wildlife, highlighting the need for more data on this topic.
  • This study focused on evaluating the antibiotic resistance profiles of bacteria from the feces of 110 wild boars in northern Tunisia, finding that most of the isolates identified were Escherichia coli and other related bacterial species.
  • The results revealed a significant prevalence of multidrug-resistant strains, with notably high resistance rates to common antibiotics and alarms raised over resistance to colistin and ertapenem, emphasizing wild boars as potential carriers of resistant bacteria.
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  • Researchers collected 318 nasal and rectal swabs from 159 healthy camels in Tunisia, finding a high carriage rate of Staphylococcus aureus, with 81% of swabs testing positive.
  • Among the isolates, 16 were identified as coagulase positive, and all were methicillin-susceptible, with three different genetic types and various virulence genes detected.
  • This study represents the first comprehensive genotyping and characterization of S. aureus in camels from Tunisia, contributing to understanding the pathogen’s population structure and toxin genetics.
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  • - Rabbit hemorrhagic disease (RHD), caused by the rabbit hemorrhagic disease virus (RHDV), leads to significant mortality in European rabbits and has been reported in Africa since 1992, with a new genotype (GI.2) detected in 2015.
  • - GI.2 strains are now found in various North and Sub-Saharan African countries, causing serious economic losses in rabbit breeding sectors due to the virus's high recombination rates with both harmful and benign strains.
  • - Research on Tunisian GI.2 strains shows they likely originated from Europe and emphasizes the necessity for ongoing monitoring of rabbit trade and the complete sequencing of circulating lagoviruses to manage the spread of RHD in Africa more effectively
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  • * A study sampled 470 healthy dromedary camels in Tunisia, finding that 34% tested positive for RVF, with age, flock size, and contact with other ruminants identified as key risk factors for infection.
  • * The findings suggest that RVF poses a significant risk to both camels and the farming community, highlighting the need for further research and control strategies to mitigate its spread.
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  • Enterobacteriaceae resistant to extended-spectrum cephalosporins (ESC-R) are a significant health concern, especially related to potential transmission to humans through the food chain, with the chicken industry being a major focus.
  • A study in Tunisia collected 258 cloacal swabs from five different chicken farms, all of which tested positive for ESC-R, showing prevalence rates between 4% and 67.3%.
  • The research identified a dominant ESC-R gene/plasmid combination (IncI1/ST3) in chickens, alongside various other resistance genes, suggesting a high diversity of resistant bacteria that could spread through the food supply.
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Objectives: Resistance to extended-spectrum cephalosporins, fluoroquinolones and colistin is under constant scrutiny in food-producing animals worldwide. However, little is known about camels, which provide milk and meat for human consumption, and are attractions for tourists to ride in arid regions. This study assessed the role of camels as potential reservoirs of these resistance determinants.

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Spondyloepiphyseal dysplasia congenita (SEDC) is an autosomal dominant disorder, characterized by disproportionate dwarfism with short spine, short neck associated with variable degrees of coxa vara. Cervical cord compression is the most hazardous skeletal deformity in patients with SEDC which requires special attention and management.Ten patients with the clinical and the radiographic phenotypes of spondyloepiphyseal dysplasia congenita have been recognized and the genotype was compatible with single base substitutions, deletions or duplication of part of the COL2A1 gene (6 patients out of ten have been sequenced).

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  • Bovine mastitis is a significant issue in dairy farming, leading to substantial economic losses, with major pathogens including Staphylococci, Streptococci, and coliforms.
  • This study highlights the prevalence of Escherichia coli (31.7%) and Klebsiella pneumoniae (20.7%) as key contributors to mastitis in African dairy cattle, alongside important resistance findings to antibiotics such as tetracycline and sulfonamides.
  • It emphasizes the urgent need for improved farm management practices in Tunisia to manage coliform-related mastitis and curb the spread of antibiotic-resistant strains that pose risks to public health.
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Rationale: Progressive restriction of the spinal bio-mechanics is not-uncommon deformity encountered in spine clinics. Congenital spinal fusion as seen in Klippel-Feil-anomaly, progressive non-infectious anterior vertebral fusion, and progressive spinal hyperostosis secondary to ossification of the anterior longitudinal spinal ligament are well delineated and recognized.

Patient Concerns: A 24-year-old girl has history of osteoporosis since her early childhood, associated with multiple axial and appendicular fractures and scoliosis.

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In five separate families, we identified nine individuals affected by a previously unidentified syndrome characterized by growth retardation, spine malformation, facial dysmorphisms, and developmental delays. Using homozygosity mapping, array CGH, and exome sequencing, we uncovered bi-allelic loss-of-function CDK10 mutations segregating with this disease. CDK10 is a protein kinase that partners with cyclin M to phosphorylate substrates such as ETS2 and PKN2 in order to modulate cellular growth.

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Rationale: The term idiopathic osteoporosis itself is quite a non-specific disease label, which fails to address the etiological understanding. Bone mineral density alone is not a reliable parameter to detect patients at high risk of fracture. The diversity of the clinical phenotypes of discolored teeth, blueness of the sclera, back and joint pain, cardiovascular disease, Diabetes type II, hearing problems and a long list of orthopedic problems are have to be considered.

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Sheep pox, a well-known endemic capripox infection, has significant impacts on small ruminant populations in Tunisia. It is responsible for high economic losses throughout North Africa due to its enzootic nature and to the active animal transhumance existing in some governorates in Tunisia. The aim of this review was to analyse data gathered on annual vaccination campaigns designed to control its spread by reducing the level of endemicity and to describe diagnostic and management tools adapted to the Tunisian situation.

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Background: The skeletal changes in McCune-Albright disease are usually severe because of the polyostotic form of the disease. Trendelenberg gait and limited mobility are the most common presenting features. The constellation of Café-au lait spots and polyostotic bone involvement is commonly referred to as McCune-Albright's syndrome (MAS).

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Background: We studied an unusual combination of severe short stature, mesomelia (Leri-Weill dyschondrosteosis syndrome), and multiple exostosis in several family subjects over three generations. The pattern of inheritance was compatible with autosomal dominant.

Methods: Of 21 affected members over three generations, shortness of stature, associated with mesomelia resembling Leri-Weill dyschondrosteosis syndrome with no exostoses was evident in three family subjects.

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Objective: Accurate understanding of the cause of the underlying pathology in children with diastrophic dysplasia would help in designing targeted management of their locomotion.

Methods: Diastrophic dysplasia was diagnosed in twelve patients (nine girls and three boys; age range 1-14 years), all of whom presented with small stature and apparent short extremities. Club foot (mostly talipes equinovarus) was the most frequent and consistent abnormality.

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