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Hamzaoui Z, Ferjani S, Medini I, Charaa L, Landolsi I, Ben Ali R, Khaled W, Chammam S, Abid S, Kanzari L, Ferjani A, Fakhfakh A, Kebaier D, Bouslah Z, Ben Sassi M, Trabelsi S, Boutiba-Ben Boubaker I. Genomic surveillance of SARS-CoV-2 in North Africa: 4 years of GISAID data sharing. IJID Reg 2024; 11:100356. [PMID: 38655560 PMCID: PMC11035039 DOI: 10.1016/j.ijregi.2024.100356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 04/26/2024]
Abstract
Objectives This study aimed to construct geographically, temporally, and epidemiologically representative data sets for SARS-CoV-2 in North Africa, focusing on Variants of Concern (VOCs), Variants of Interest (VOIs), and Variants Under Monitoring (VUMs). Methods SARS-CoV-2 genomic sequences and metadata from the EpiCoV database via the Global Initiative on Sharing All Influenza Data platform were analyzed. Data analysis included cases, deaths, demographics, patient status, sequencing technologies, and variant analysis. Results A comprehensive analysis of 10,783 viral genomic sequences from six North African countries revealed notable insights. SARS-CoV-2 sampling methods lack standardization, with a majority of countries lacking clear strategies. Over 59% of analyzed genomes lack essential clinical and demographic metadata, including patient age, sex, underlying health conditions, and clinical outcomes, which are essential for comprehensive genomic analysis and epidemiological studies, as submitted to the Global Initiative on Sharing All Influenza Data. Morocco reported the highest number of confirmed COVID-19 cases (1,272,490), whereas Tunisia leads in reported deaths (29,341), emphasizing regional variations in the pandemic's impact. The GRA clade emerged as predominant in North African countries. The lineage analysis showcased a diversity of 190 lineages in Egypt, 26 in Libya, 121 in Tunisia, 90 in Algeria, 146 in Morocco, and 10 in Mauritania. The temporal dynamics of SARS-CoV-2 variants revealed distinct waves driven by different variants. Conclusions This study contributes valuable insights into the genomic landscape of SARS-CoV-2 in North Africa, highlighting the importance of genomic surveillance in understanding viral dynamics and informing public health strategies.
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Affiliation(s)
- Zaineb Hamzaoui
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Sana Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Ines Medini
- National Center Chalbibelkahia of Pharmacovigilance of Tunis, Laboratory of Clinical Pharmacology, Tunis, Tunisia
| | - Latifa Charaa
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Ichrak Landolsi
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Roua Ben Ali
- National Center Chalbibelkahia of Pharmacovigilance of Tunis, Laboratory of Clinical Pharmacology, Tunis, Tunisia
| | - Wissal Khaled
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Sarra Chammam
- National Center Chalbibelkahia of Pharmacovigilance of Tunis, Laboratory of Clinical Pharmacology, Tunis, Tunisia
| | - Salma Abid
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Lamia Kanzari
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Asma Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Ahmed Fakhfakh
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Dhouha Kebaier
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Zoubeir Bouslah
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Mouna Ben Sassi
- National Center Chalbibelkahia of Pharmacovigilance of Tunis, Laboratory of Clinical Pharmacology, Tunis, Tunisia
- University of Tunis El Manar, Faculty of Medicine of Tunis, Tunis Tunisia
| | - Sameh Trabelsi
- National Center Chalbibelkahia of Pharmacovigilance of Tunis, Laboratory of Clinical Pharmacology, Tunis, Tunisia
- University of Tunis El Manar, Faculty of Medicine of Tunis, Tunis Tunisia
| | - Ilhem Boutiba-Ben Boubaker
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis, Tunisia
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Bouzouita A, Rehaiem A, Saadi A, Zaghbib S, Chakroun M, Ayed H, Ferjani A, Derouiche A, Boubaker IBB, Slama MRB. Antimicrobial prophylaxis protocol based on rectal swab culture before prostate biopsy to prevent infectious complications: a prospective randomized comparative study. Int Urol Nephrol 2024:10.1007/s11255-024-03998-7. [PMID: 38448785 DOI: 10.1007/s11255-024-03998-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 02/16/2024] [Indexed: 03/08/2024]
Abstract
PURPOSE To evaluate the benefit of targeted antibiotic prophylaxis (TAP) based on rectal swab culture in comparison with standard empiric antimicrobial prophylaxis in patients undergoing transrectal ultrasound-guided needle biopsy of the prostate (TRUS-BP), as well as to assess rate of fecal carriage of Fluoroquinolone-resistant Enterobacterales FQRE. PATIENTS AND METHODS We prospectively analyzed data that randomized 157 patients within two groups: (G1) TAP according to rectal swab performed 10 days before PB; (G2): empirical antibiotic prophylaxis with ciprofloxacin. Prevalence of FQRE digestive carriage and risk factors were investigated. Incidence of infectious complications after (TRUS-BP) in each group was compared. RESULTS G2 included 80 patients versus 77 in G1. There was no difference between the two groups regarding age, diabetes, prostate volume, PSA, number of biopsy cores, and risk factors for FQRE. In G2, the prevalence of FQRE digestive carriage was 56.3% all related to E. coli species. In the case of digestive carriage of FQRE, TAP according to the rectal swab culture with third-generation cephalosporins was performed in 73.3%. Patients with FQRE had history of FQ use within the last 6 months in 17.8% (p = 0.03). Rate of febrile urinary tract infection after PB was 13% in G1 and 3.8% in G2 (p = 0.02). CONCLUSIONS Incidence of FQ resistance in the intestinal flora of our local population was prevalent. Risk factor for resistance was the use of FQ within the last 6 months. TAP adapted to rectal swab, mainly with third-generation cephalosporins, significantly reduced the rate of infectious complications after (TRUS-BP).
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Affiliation(s)
- A Bouzouita
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - A Rehaiem
- Microbiology Departments, Charles Nicolle Hospital, Tunis, Tunisia.
- Faculty of Medicine of Tunis, LR99ES09 Research Laboratory (Antimicrobial Resistance), University of Tunis El Manar, 1007, Tunis, Tunisia.
| | - A Saadi
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - S Zaghbib
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - M Chakroun
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - H Ayed
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - A Ferjani
- Microbiology Departments, Charles Nicolle Hospital, Tunis, Tunisia
- Faculty of Medicine of Tunis, LR99ES09 Research Laboratory (Antimicrobial Resistance), University of Tunis El Manar, 1007, Tunis, Tunisia
| | - A Derouiche
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
| | - I Boutiba-Ben Boubaker
- Microbiology Departments, Charles Nicolle Hospital, Tunis, Tunisia
- Faculty of Medicine of Tunis, LR99ES09 Research Laboratory (Antimicrobial Resistance), University of Tunis El Manar, 1007, Tunis, Tunisia
| | - M R Ben Slama
- Urology Department, Charles Nicolle Hospital, Tunis, Tunisia
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Bchiri S, Bouzekri A, Ouni R, Lahiani R, Romdhane E, Dekhil N, Ben Hamouda S, Mardassi H, Ferjani A, Petit E, Corbière V, Rammeh S, Mascart F, Locht C, Ben Salah M, Barbouche MR, Benabdessalem C. HBHA-IGRA and cytotoxic mediators release assays for the diagnosis of cervical tuberculous lymphadenitis. Microbiol Spectr 2023; 11:e0163823. [PMID: 37909771 PMCID: PMC10715125 DOI: 10.1128/spectrum.01638-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/27/2023] [Indexed: 11/03/2023] Open
Abstract
IMPORTANCE Cervical tuberculous lymphadenitis (CTL), the most frequent extrapulmonary form of tuberculosis, is currently a major health problem in Tunisia and in several regions around the world. CTL diagnosis is challenging mainly due to the paucibacillary nature of the disease and the potential misdiagnosis as cervical non-tuberculous lymphadenitis. This study demonstrates the added value of the heparin-binding hemagglutinin-interferon-gamma release assay as an immunoassay in the context of CTL.
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Affiliation(s)
- Soumaya Bchiri
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
- Department of biological sciences, Faculty of Sciences of Tunis, Tunis, Tunisia
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Asma Bouzekri
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Rym Ouni
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
| | - Rim Lahiani
- ENT Department, Charles Nicolle Hospital, Tunis, Tunisia
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Emna Romdhane
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Neira Dekhil
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Molecular Microbiology, Vaccinology and Biotechnology Development, Pasteur Institute of Tunis, Tunis, Tunisia
| | - Sonia Ben Hamouda
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Helmi Mardassi
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratory of Molecular Microbiology, Vaccinology and Biotechnology Development, Pasteur Institute of Tunis, Tunis, Tunisia
| | - Asma Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Laboratoire de Recherche Résistance Aux Antibiotiques, Faculté de Médecine de Tunis, Hôpital Charles Nicolle, Tunis, Tunisia
| | - Emanuelle Petit
- U-1019—CIIL-Center of Infection and Immunity of Lille, Univ Lille, CNRS, Inserm, Université de Lille, Institut Pasteur de Lille, Lille, France
| | - Véronique Corbière
- Laboratory of Vaccinology and Mucosal Immunity, Internal Medicine Department, Hôpital Universitaire de Bruxelles–CUB Hôpital Erasme, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium
| | - Soumaya Rammeh
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia
| | - Françoise Mascart
- Laboratory of Vaccinology and Mucosal Immunity, Internal Medicine Department, Hôpital Universitaire de Bruxelles–CUB Hôpital Erasme, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium
| | - Camille Locht
- U-1019—CIIL-Center of Infection and Immunity of Lille, Univ Lille, CNRS, Inserm, Université de Lille, Institut Pasteur de Lille, Lille, France
| | - Mamia Ben Salah
- ENT Department, Charles Nicolle Hospital, Tunis, Tunisia
- Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Mohamed Ridha Barbouche
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Chaouki Benabdessalem
- Laboratory of Transmission, Control and Immunobiology of Infections, Pasteur Institute of Tunis, Tunis, Tunisia
- Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
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Ferjani S, Maamar E, Ferjani A, Meftah K, Battikh H, Mnif B, Hamdoun M, Chebbi Y, Kanzari L, Achour W, Bahri O, Hammami A, Zribi M, Smaoui H, Boubaker IBB. Tunisian Multicenter Study on the Prevalence of Colistin Resistance in Clinical Isolates of Gram Negative Bacilli: Emergence of Escherichia coli Harbouring the mcr-1 Gene. Antibiotics (Basel) 2022; 11:antibiotics11101390. [PMID: 36290048 PMCID: PMC9598684 DOI: 10.3390/antibiotics11101390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/12/2022] [Accepted: 10/02/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Actually, no data on the prevalence of plasmid colistin resistance in Tunisia are available among clinical bacteria. Objectives: This study aimed to investigate the current epidemiology of colistin resistance and the spread of the mcr gene in clinical Gram-negative bacteria (GNB) isolated from six Tunisian university hospitals. Methods: A total of 836 GNB strains were inoculated on COL-R agar plates with selective screening agar for the isolation of GNB resistant to colistin. For the selected isolates, mcr genes, beta-lactamases associated-resistance genes and molecular characterisation were screened by PCRs and sequencing. Results: Colistin-resistance was detected in 5.02% (42/836) of the isolates and colistin-resistant isolates harboured an ESBL (blaCTX-M-15) and/or a carbapenemase (blaOXA-48, blaVIM) encoding gene in 45.2% of the cases. The mcr-1 gene was detected in four E. coli isolates (0.59%) causing urinary tract infections and all these isolates also contained the blaTEM-1 gene. The blaCTX-M-15 gene was detected in three isolates that also carried the IncY and IncFIB replicons. The genetic environment surrounding the mcr-carrying plasmid indicated the presence of pap-2 gene upstream mcr-1 resistance marker with unusual missing of ISApl1 insertion sequence. The Conclusions: This study reports the first description of the mcr-1 gene among clinical E. coli isolates in Tunisia and provides an incentive to conduct routine colistin susceptibility testing in GNB clinical isolates.
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Affiliation(s)
- Sana Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Correspondence: ; Tel.: +216-515-47301
| | - Elaa Maamar
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis Rue Djebal Lakhdar 1006, Tunisia
| | - Asma Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Charles Nicolle Hospital, Laboratory of Microbiology, Boulevard 9 April, Tunis 1006, Tunisia
| | - Khaoula Meftah
- Laboratory of Microbiology, Children’s Hospital of Tunis, Boulevard 9 April, Tunis 1006, Tunisia
| | - Hager Battikh
- Microbiology Laboratory, Rabta University Hospital, Rue Jabbari, Tunis 1007, Tunisia
| | - Besma Mnif
- Laboratory of Microbiology, Habib Bourguiba University Hospital, Route de l’Ain, Sfax 3000, Tunisia
- Research Laboratory for Microorganisms and Human Disease, University of Sfax, Avenue Majida Boulila, Sfax 3029, Tunisia
| | - Manel Hamdoun
- Aziza Othmana Hospital, Laboratoire de Microbiologie-Biochimie, Bab Menara Tunis 1008, Tunisia
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR16SP01, Tunis Rue Djebal Lakhdar 1006, Tunisia
| | - Yosra Chebbi
- National Bone Marrow Transplant Center, Laboratory Ward, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Faculty of Medicine of Tunis, Tunis El Manar University, LR18ES39, Tunis Rue Djebal Lakhdar 1006, Tunisia
| | - Lamia Kanzari
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Charles Nicolle Hospital, Laboratory of Microbiology, Boulevard 9 April, Tunis 1006, Tunisia
| | - Wafa Achour
- National Bone Marrow Transplant Center, Laboratory Ward, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Faculty of Medicine of Tunis, Tunis El Manar University, LR18ES39, Tunis Rue Djebal Lakhdar 1006, Tunisia
| | - Olfa Bahri
- Aziza Othmana Hospital, Laboratoire de Microbiologie-Biochimie, Bab Menara Tunis 1008, Tunisia
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR16SP01, Tunis Rue Djebal Lakhdar 1006, Tunisia
| | - Adenene Hammami
- Laboratory of Microbiology, Habib Bourguiba University Hospital, Route de l’Ain, Sfax 3000, Tunisia
- Research Laboratory for Microorganisms and Human Disease, University of Sfax, Avenue Majida Boulila, Sfax 3029, Tunisia
| | - Meriam Zribi
- Microbiology Laboratory, Rabta University Hospital, Rue Jabbari, Tunis 1007, Tunisia
| | - Hanen Smaoui
- Laboratory of Microbiology, Children’s Hospital of Tunis, Boulevard 9 April, Tunis 1006, Tunisia
| | - Ilhem Boutiba-Ben Boubaker
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis Rue Djebal Lakhdar 1006, Tunisia
- Charles Nicolle Hospital, Laboratory of Microbiology, Boulevard 9 April, Tunis 1006, Tunisia
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Ferjani S, Kanzari L, Maamar E, Hamzaoui Z, Rehaiem A, Ferjani A, Boutiba-Ben Boubaker I. Extensively drug-resistant Acinetobacter baumannii co-producing VIM-2 and OXA-23 in intensive care units: Results of a one-day point prevalence in a Tunisian hospital. Infect Dis Now 2022; 52:426-431. [DOI: 10.1016/j.idnow.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 08/05/2022] [Accepted: 09/05/2022] [Indexed: 11/26/2022]
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Ferjani S, Maamar E, Ferjani A, Kanzari L, Boubaker IBB. Evaluation of Three Carbapenemase-Phenotypic Detection Methods and Emergence of Diverse VIM and GES Variants among Pseudomonas aeruginosa Isolates in Tunisia. Antibiotics (Basel) 2022; 11:antibiotics11070858. [PMID: 35884112 PMCID: PMC9311584 DOI: 10.3390/antibiotics11070858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 06/14/2022] [Accepted: 06/20/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Since 2012, few reports on the molecular epidemiology of Pseudomonas aeruginosa were reported in Tunisia. Objectives: This study aimed to evaluate carbapenem-resistance determinants and molecular epidemiology and to compare the carbapenemase-phenotypic detection methods of multidrug-resistant P. aeruginosa isolates. Methods: During a period of four years (2014 to 2017), all imipenem-ceftazidime-resistant P. aeruginosa isolates were retrospectively selected at the microbial laboratory of Charles Nicolle hospital of Tunis. These isolates were examined by the modified Hodge test, modified carbapenem inactivation method (mCIM), and another mCIM, called CIMTris, and their performance was evaluated using PCR analysis as the gold standard. Results: A total of 35 isolates were recovered among patients hospitalized in different units. All strains were colistin-susceptible.All carbapenem-resistant isolates showed a high-level resistance to carbapenems. CIMTris and mCIM showed 96.15% and 46.15% sensitivity and 44.44% and 100% specificity, respectively, for detecting carbapenemase production.Conclusions: CIMTris is a promising approach for detecting carbapenemase activity in P. aeruginosa and merits further testing. Moreover, this study described the first detection of GES-5- and GES-9-producing P. aeruginosa in Tunisia as well as the co-occurrence of the blaGES-5 and blaVIM-11 carbapenemase genes in one isolate. These findings are of great concern because the rapid dissemination of MDR strains represents a major therapeutic and epidemiological threat.
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Affiliation(s)
- Sana Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis 1007, Tunisia; (E.M.); (A.F.); (L.K.); (I.B.B.B.)
- Correspondence: ; Tel.: +216-515-473-01
| | - Elaa Maamar
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis 1007, Tunisia; (E.M.); (A.F.); (L.K.); (I.B.B.B.)
| | - Asma Ferjani
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis 1007, Tunisia; (E.M.); (A.F.); (L.K.); (I.B.B.B.)
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis 1006, Tunisia
| | - Lamia Kanzari
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis 1007, Tunisia; (E.M.); (A.F.); (L.K.); (I.B.B.B.)
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis 1006, Tunisia
| | - Ilhem Boutiba Ben Boubaker
- Faculty of Medicine of Tunis, University of Tunis El Manar, LR99ES09, Tunis 1007, Tunisia; (E.M.); (A.F.); (L.K.); (I.B.B.B.)
- Laboratory of Microbiology, Charles Nicolle Hospital, Tunis 1006, Tunisia
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Saadi M, Saadi A, Chakroun M, Ferjani A, Bouzouita A, Derouiche A, Ben Slama R, Boutiba I, Ayed H, Chebil M. Étude de l’écologie bactérienne des pyélonéphrites emphysémateuses. Infect Dis Now 2021. [DOI: 10.1016/j.idnow.2021.06.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abid S, Ferjani S, El Moussi A, Ferjani A, Nasr M, Landolsi I, Saidi K, Gharbi H, Letaief H, Hechaichi A, Safer M, Ben Alaya NBE, Boubaker IBB. Assessment of sample pooling for SARS-CoV-2 molecular testing for screening of asymptomatic persons in Tunisia. Diagn Microbiol Infect Dis 2020; 98:115125. [PMID: 32768876 PMCID: PMC7335417 DOI: 10.1016/j.diagmicrobio.2020.115125] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/26/2020] [Accepted: 06/29/2020] [Indexed: 12/03/2022]
Abstract
The aim of this study is to test a pooling approach for the RT-PCR test to detect low viral loads of SARS-CoV-2. We found that a single positive specimen can still be detected in pools of up to 10. Each laboratory should conduct its own evaluation and validation of pooling protocols according to its specific context.
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Affiliation(s)
- Salma Abid
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia; University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES09, 1007, Tunis, Tunisia
| | - Sana Ferjani
- University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES09, 1007, Tunis, Tunisia.
| | - Awatef El Moussi
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia; University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES09, 1007, Tunis, Tunisia
| | - Asma Ferjani
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia; University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES09, 1007, Tunis, Tunisia
| | - Mejda Nasr
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia
| | - Ichrak Landolsi
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia
| | - Karima Saidi
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia
| | - Hanène Gharbi
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia
| | - Hajer Letaief
- Ministry of Health, National Observatory of New and Emerging Diseases, 1006, Tunis, Tunisia
| | - Aicha Hechaichi
- Ministry of Health, National Observatory of New and Emerging Diseases, 1006, Tunis, Tunisia
| | - Mouna Safer
- Ministry of Health, National Observatory of New and Emerging Diseases, 1006, Tunis, Tunisia
| | | | - Ilhem Boutiba-Ben Boubaker
- Charles Nicolle Hospital, Laboratory of Microbiology, Virology unit, National Influenza and other Respiratory Viruses Center-Tunisia, Boulevard 9 Avril, Tunis 1006, Tunisia; University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES09, 1007, Tunis, Tunisia
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Romdhane E, Arfaoui A, Benabdessalem C, Ksentini M, Ferjani A, Dekhil N, Lahiani R, Bchiri S, Mardassi H, Barbouche MR, Boutiba Ben Boubake I, Ben Salah M, Rammeh S. Performance of GeneXpert ultra in the diagnosis of Tuberculous Cervical lymphadenitis in formalin fixed paraffin embedded tissues. Tuberculosis (Edinb) 2020; 125:102012. [PMID: 33128936 DOI: 10.1016/j.tube.2020.102012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 10/15/2020] [Accepted: 10/18/2020] [Indexed: 10/23/2022]
Abstract
The diagnosis of Tuberculous Cervical lymphadenitis (TCL) is challenging. The present study aimed to assess the performance of GeneXpert ultra (GXu) in the diagnosis of TCL on Formalin Fixed, Paraffin Embedded Tissues (FFPET). This study included 35 TCL cases confirmed by positive microbiology and/or positive GXu on Fresh Tissues (FT). The diagnostic performance parameters of GXu on FFPET were determined with reference to microbiology (positive Ziehl Neelsen and/or positive culture) and with reference to positive microbiology and/or positive GXu on FT. The GXu on FFPET was positive in 26/35 (74%) cases. With reference to positive ZN and or culture, the sensitivity, specificity, positive predictive value, and negative predictive value of GXu on FFPET were 63%, 100%, 100% and 71% respectively. With reference to positive microbiology and/or positive GXu on FT, these rates were 74%, 100%, 100% and 40% respectively. GXu on FFPET is a reliable tool for the detection of Mycobacterium tuberculosis complex particularly for cases where microbiological investigations have not been performed.
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Affiliation(s)
- Emna Romdhane
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia; UR17ES15, Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisia.
| | - Amira Arfaoui
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia; UR17ES15, Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Chaouki Benabdessalem
- Laboratory of Transmission, Control and Immunobiology of Infection - LR11IPT-02, Institut Pasteur de Tunis, Tunisia, University Tunis El Manar, Tunisia
| | - Meriam Ksentini
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia; UR17ES15, Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Asma Ferjani
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, Hôpital Charles Nicolle, Laboratoire de microbiologie, 1007, Tunis, Tunisia
| | - Neira Dekhil
- Unit of Typing and Genetics of Mycobacteria, Laboratory of Molecular Microbiology, Vaccinology, and Biotechnology Development, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunisia
| | - Rim Lahiani
- Department of Ear Nose and Throat, Charles Nicolle Hospital, Tunis, Tunisia
| | - Soumaya Bchiri
- Laboratory of Transmission, Control and Immunobiology of Infection - LR11IPT-02, Institut Pasteur de Tunis, Tunisia, University Tunis El Manar, Tunisia
| | - Helmi Mardassi
- Unit of Typing and Genetics of Mycobacteria, Laboratory of Molecular Microbiology, Vaccinology, and Biotechnology Development, Institut Pasteur de Tunis, Université de Tunis El Manar, Tunisia
| | - Mohamed-Ridha Barbouche
- Laboratory of Transmission, Control and Immunobiology of Infection - LR11IPT-02, Institut Pasteur de Tunis, Tunisia, University Tunis El Manar, Tunisia
| | - Ilhem Boutiba Ben Boubake
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, Hôpital Charles Nicolle, Laboratoire de microbiologie, 1007, Tunis, Tunisia
| | - Mamia Ben Salah
- Department of Ear Nose and Throat, Charles Nicolle Hospital, Tunis, Tunisia
| | - Soumaya Rammeh
- Department of Pathology, Charles Nicolle Hospital, Tunis, Tunisia; UR17ES15, Faculté de Médecine de Tunis, Université de Tunis El Manar, Tunis, Tunisia
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Zaghbib S, Chakroun M, Saadi A, Zouari S, Bouzouita A, Ayed H, Chebil M, Ferjani A, Boutiba I. Caractéristiques épidémiologiques et cliniques des infections à entérobactéries productrices de carbapénémases en urologie. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Zaghdoudi A, Hchaichi A, El Moussi A, Letaeif H, Abid S, Ferjani A, Ben Alaya N, Boutiba I. Diagnostic de la COVID-19 : expérience du laboratoire national de référence. Med Mal Infect 2020. [PMCID: PMC7441865 DOI: 10.1016/j.medmal.2020.06.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Introduction Le diagnostic de la COVID-19 se base sur la détection d’une ou de deux régions spécifiques du génome de SARS-CoV-2 par RT-PCR en temps réel. Le Laboratoire national de référence (LNR) de surveillance de la grippe et des autres viroses respiratoires a été désigné pour assurer cette tâche jusqu’au 27 mars, date à laquelle le réseau des laboratoires a été élargi pour augmenter la capacité nationale du testing. La présente étude rapporte l’expérience du LNR pendant la période où il a assuré à lui seul le diagnostic de la COVID-19 (6 février au 26 mars). Matériels et méthodes Après optimisation de la technique de RT-PCR en temps réel se basant sur le protocole de Hong Kong (gènes cibles N et ORF1b), l’analyse de 1913 prélèvements nasopharyngés a été réalisée. Les résultats étaient quotidiennement adressés à l’Observatoire national des maladies nouvelles et émergentes (ONMNE) pour assurer la surveillance, l’investigation et le contact tracing en cas de détection de cas positifs et ce afin de limiter l’extension de la maladie. Résultats Au cours de cette période, 229 (12 %) cas positifs ont été colligés. Le 2 mars, le premier cas a été diagnostiqué. Il s’agissait d’un cas importé d’Italie. Ce dernier a été placé en confinement. Le 10 mars, les deux premiers cas autochtones ont été identifiés. La capitale et les villes avoisinantes étaient les régions les plus touchées avec 113 (49,3 %) cas. Le sex-ratio était de 1,14 soit 122 hommes (53,3 %) et 107 de femmes (46,7 %). La moyenne d’âge était de 46,18 ans avec des extrêmes allant de 6 mois à 85 ans. La tranche d’âge entre 15 et 45 ans était la plus touchée avec une fréquence de 48,9 %. La transmission était autochtone chez 117 (51,1 %) patients, versus 112 (48 %) cas importés. La majorité des cas étaient symptomatiques (82,5 %). La fièvre (93 %), la toux (77 %) et l’asthénie (43 %) étaient les symptômes les plus rapportés. Les cas symptomatiques étaient significativement plus fréquents parmi les cas importés 93 % contre 72,6 % des cas autochtones avec un OR de 4,9 et un intervalle de confiance 95 % = [2,14–11,23]. Les mesures prises pour les malades asymptomatiques étaient l’auto-isolement à domicile (64,2 %) ou l’hébergement dans des centres de confinement (16,6 %). Quarante quatre (19,2 %) patients avaient nécessité une hospitalisation dont 20 (43,5 %) en réanimation avec un taux de létalité de 7,4 % (17 décès sur 229). Le personnel de santé représentait 12,2 % (28 cas) du total des personnes infectées par le SARS-CoV-2, avec une transmission majoritairement autochtone (75 %). Conclusion Les mesures judicieuses entreprises au cours de cette période ont permis d’établir un plan de prévention et de riposte au risque de diffusion du SARS-CoV-2. Ceci est étroitement lié à la collaboration entre les différents intervenants de tous les secteurs.
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Zaghbib S, Saadi A, Chakroun M, Chaker K, Bouzouita A, Ferjani A, Boutiba I, Ayed H, Chebil M. Détection du portage digestif d’Entérobactéries résistantes aux fluoroquinolones avant biopsie prostatique et intérêt de la prophylaxie ciblée selon la culture rectale. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Zouari S, Chakroun M, Saadi A, Zaghbib S, Bouzouita A, Ayed H, Chebil M, Ferjani A, Boutiba I. Caractéristiques épidémiologiques et bactériologiques des pyélonéphrites aiguës lithiasiques. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Bellazreg F, Guigua A, Ferjani A, Hattab Z, Boukadida J, Ach K, Letaief R, Hachfi W, Letaief A. Correlation between superficial and intra-operative specimens in diabetic foot infections: results of a cross-sectional Tunisian study. Afr Health Sci 2019; 19:2505-2514. [PMID: 32127823 PMCID: PMC7040269 DOI: 10.4314/ahs.v19i3.26] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective To determine the correlation between superficial, and intra-operative specimens in diabetic foot infections (DFIs). Methods We conducted a cross-sectional study in patients with DFIs hospitalized in a Tunisian teaching hospital. Superficial specimens were collected for all patients, and intra-operative specimens were collected in operated patients. The specimens were processed using standard microbiology techniques. Antimicrobial susceptibility testing was carried out according to the protocol established by the European Committee on Anti-microbial Susceptibility Testing. Intra-operative and superficial specimens were considered correlated if they isolated the same microorganism(s), or if they were both negative. Results One hundred twelve patients, 81 males and 31 females, mean age 56 years, were included. Superficial samples were positive in 77% of cases, and isolated 126 microorganisms. Among the positive samples, 71% were monomicrobial. The most frequently isolated microorganisms were Enterobacteriaceae (53%), followed by streptococci (21%) and Staphylococcus aureus (17%). Nine microorganisms (7%) were multi-drug resistant. Intra-operative samples were positive in 93% of cases. Superficial specimens were correlated to intra-operative specimens in 67% of cases. Initial antibiotic therapy was appropriate in 70% of cases. The lower-extremity amputation and the mortality rates were 41% and 1%, respectively. Conclusion In our study, DFIs were most frequently caused by Enterobacteriaceae and superficial specimens were correlated to intra-operative specimens in only two thirds of cases. Clinicians should emphasize on the systematic practice of intraoperative specimens in all patients with DFIs treated surgically, while well-performed superficial specimens could be useful for prescribing appropriate antibiotic therapy in other patients.
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Affiliation(s)
- Foued Bellazreg
- Department of Infectious Diseases, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Ahmed Guigua
- Department of Internal Medicine, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Asma Ferjani
- Department of Microbiology, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Zouhour Hattab
- Department of Infectious Diseases, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Jalel Boukadida
- Department of Microbiology, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Koussay Ach
- Department of Endocrinolgy, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Rached Letaief
- Department of General Surgery, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Wissem Hachfi
- Department of Infectious Diseases, Farhat Hached hospital, 4000 Sousse, Tunisia
| | - Amel Letaief
- Department of Infectious Diseases, Farhat Hached hospital, 4000 Sousse, Tunisia
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Tfifha M, Ferjani A, Mallouli M, Mlika N, Abroug S, Boukadida J. Carriage of multidrug-resistant bacteria among pediatric patients before and during their hospitalization in a tertiary pediatric unit in Tunisia. Libyan J Med 2018; 13:1419047. [PMID: 29277142 PMCID: PMC5757224 DOI: 10.1080/19932820.2017.1419047] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The pandemic spread of multidrug-resistant (MDR) bacteria (i.e., methicillin-resistant Staphylococcus aureus (MRSA), extended-spectrum b-lactamase-producing Enterobacteriaceae (ESBLPE), vancomycin-resistant enterococci, carbapenemase-producing Enterobacteriaceae (CPE), multiresistant Pseudomonas aeruginosa and multiresistant Acinetobacter baumannii) pose a threat to healthcare Worldwide. We found limited data of MDR bacteria in pediatric patients hospitalized in Tunisian tertiary healthcare.The aim of the study is to evaluate the acquisition rate of MDR acquisition during hospitalization and to explore some of the associated risk factors for both carriage and acquisition at the pediatric department, Sahloul University Hospital. During September and October 2016, newly admitted patients were screened, at admission, during care and at discharge. Risk factors for colonization were explored by multivariate analysis. Of 112 newly admitted patients, 8.92% were colonized with at least one MDR. No risk factor was identified at admission. During hospitalization, five newly acquisition MDR (4.9%) were detected and eight (7.84%) at discharge. The specie most frequently detected on admission was Escherichia coli (50%), whereas, on discharge, Escherichia coli and K. pneumoniae were the species most frequently detected (52.7%). The pediatric intensive care unit (PICU) hospitalization, the length of hospital stay (more than 3days) and age under 2 years were identified as risk factor for acquisition of MDR during hospitalization. We identified several independent risk factors for contracting MDR bacteria during hospitalization in a tertiary pediatric department. The incidence of symptomatic MDR Infection among those colonized should be under close surveillance and long-term screening for those children is required. An institutional screening program for MDR especially in PICU might be discussed in regards to cost effectiveness.
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Affiliation(s)
- Miniar Tfifha
- a Pediatric Department, Sahloul Hospital, UR02SP13 , CHU Farhat Hached , Sousse , Tunisia
| | - Asma Ferjani
- b Microbiology and Immunology Department, UR02SP13 , CHU Farhat Hached , Sousse , Tunisia
| | - Manel Mallouli
- c Faculty of Medicine , University of Sousse , Sousse , Tunisia
| | - Nesrine Mlika
- d Pediatric Department , Sahloul Hospital , Sousse , Tunisia
| | - Saoussen Abroug
- d Pediatric Department , Sahloul Hospital , Sousse , Tunisia
| | - Jalel Boukadida
- b Microbiology and Immunology Department, UR02SP13 , CHU Farhat Hached , Sousse , Tunisia
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Kanzari L, Ferjani S, Saidani M, Hamzaoui Z, Jendoubi A, Harbaoui S, Ferjani A, Rehaiem A, Boutiba Ben Boubaker I, Slim A. First report of extensively-drug-resistant Proteus mirabilis isolate carrying plasmid-mediated bla NDM-1 in a Tunisian intensive care unit. Int J Antimicrob Agents 2018; 52:906-909. [PMID: 29958975 DOI: 10.1016/j.ijantimicag.2018.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 05/15/2018] [Accepted: 06/16/2018] [Indexed: 10/28/2022]
Abstract
Emergence of the New Delhi metallo-β-lactamase (NDM-1), an Ambler class B metallo-β-lactamase able to hydrolyse all β-lactams except monobactams, constitutes a critical and increasingly important medical issue. The acquisition of blaNDM-1 is of particular concern for Proteus mirabilis, which is intrinsically resistant to tetracycline, tigecycline and colistin, as this will make clinical treatment extremely difficult. To the authors' knowledge, this is the first report of the blaNDM-1 gene in an extensively-drug-resistant P. mirabilis clinical isolate carrying plasmid-mediated resistance to carbapenems (blaNDM-1), cephalosporins (blaCMY-4), aminoglycosides (aph3 VIa and aph3 Ia) and fluoroquinolones (qnrA6).
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Affiliation(s)
- Lamia Kanzari
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie.
| | - Sana Ferjani
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie
| | - Mabrouka Saidani
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie
| | - Zeineb Hamzaoui
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie
| | - Ali Jendoubi
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Unité de réanimation médico-chirurgicale, Tunis, Tunisie
| | - Sarra Harbaoui
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie
| | - Asma Ferjani
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie
| | - Amel Rehaiem
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie
| | - Ilhem Boutiba Ben Boubaker
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie
| | - Amine Slim
- Université de Tunis El Manar, Faculté de Médecine de Tunis, Laboratoire de Recherche "Résistance aux antibiotiques" LR99ES09, 1007, Tunis, Tunisie; Hôpital Charles Nicolle, Laboratoire de microbiologie, Tunis, Tunisie
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Chaker K, Chakroun M, Bouzouita A, Gharbi M, Saidani M, Ferjani A, Cherif M, Ayed H, Benslama R, Derouiche A, Chebil M. Évaluation de la prescription des carbapénèmes au cours des pyélonéphrites aiguës obstructives. Rev Med Interne 2018. [DOI: 10.1016/j.revmed.2018.03.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Alibi S, Ferjani A, Boukadida J, Cano ME, Fernández-Martínez M, Martínez-Martínez L, Navas J. Occurrence of Corynebacterium striatum as an emerging antibiotic-resistant nosocomial pathogen in a Tunisian hospital. Sci Rep 2017; 7:9704. [PMID: 28848236 PMCID: PMC5573724 DOI: 10.1038/s41598-017-10081-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 08/04/2017] [Indexed: 11/17/2022] Open
Abstract
Corynebacterium striatum is a nosocomial opportunistic pathogen increasingly associated with a wide range of human infections and is often resistant to several antibiotics. We investigated the susceptibility of 63 C. striatum isolated at the Farhat-Hached hospital, Sousse (Tunisia), during the period 2011–2014, to a panel of 16 compounds belonging to the main clinically relevant classes of antimicrobial agents. All strains were susceptible to vancomycin, linezolid, and daptomycin. Amikacin and gentamicin also showed good activity (MICs90 = 1 and 2 mg/L, respectively). High rates of resistance to penicillin (82.5%), clindamycin (79.4%), cefotaxime (60.3%), erythromycin (47.6%), ciprofloxacin (36.5%), moxifloxacin (34.9%), and rifampicin (25.4%) were observed. Fifty-nine (93.7%) out of the 63 isolates showed resistance to at least one compound and 31 (49.2%) were multidrug-resistant. Twenty-nine resistance profiles were distinguished among the 59 resistant C. striatum. Most of the strains resistant to fluoroquinolones showed a double mutation leading to an amino acid change in positions 87 and 91 in the quinolone resistance-determining region of the gyrA gene. The 52 strains resistant to penicillin were positive for the gene bla, encoding a class A β-lactamase. Twenty-two PFGE patterns were identified among the 63 C. striatum, indicating that some clones have spread within the hospital.
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Affiliation(s)
- Sana Alibi
- Laboratoire de microbiologie-immunologie, unite de recherché "caractérisation génomique des agents infectieux UR12SP34", CHU Farhat-Hached, Sousse, Tunisia.,Faculté des sciences de Bizerte, Université de Carthage, Jarzouna, Tunisia
| | - Asma Ferjani
- Laboratoire de microbiologie-immunologie, unite de recherché "caractérisation génomique des agents infectieux UR12SP34", CHU Farhat-Hached, Sousse, Tunisia
| | - Jalel Boukadida
- Laboratoire de microbiologie-immunologie, unite de recherché "caractérisation génomique des agents infectieux UR12SP34", CHU Farhat-Hached, Sousse, Tunisia
| | - María Eliecer Cano
- Servicio de Microbiología, Hospital Universitario Marqués de Valdecilla-IDIVAL, Santander, Spain
| | - Marta Fernández-Martínez
- Servicio de Microbiología, Hospital Universitario Marqués de Valdecilla-IDIVAL, Santander, Spain
| | - Luis Martínez-Martínez
- Unidad de Gestión Clínica, Hospital Universitario Reina Sofía, Córdoba, Spain.,Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain.,Departamento de Microbiología, Universidad de Córdoba, Córdoba, Spain
| | - Jesús Navas
- Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain.
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Alibi S, Ferjani A, Boukadida J, Ruiz de Alegría C, Martínez-Martínez L, Navas J. Evaluation of the VITEK-MS matrix-assisted laser desorption/ionization time-of-flight mass spectrometry system for the identification of clinical Corynebacterium species. Rev Esp Quimioter 2017; 30:57-58. [PMID: 27898209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
| | | | | | | | | | - J Navas
- Jesús Navas. Facultad de Medicina. Dpto. de Biología Molecular. Universidad de Cantabria. Herrera Oria s/n. 39011 Santander. Spain.
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Alibi S, Ferjani A, Gaillot O, Marzouk M, Courcol R, Boukadida J. Identification of clinically relevant Corynebacterium strains by Api Coryne, MALDI-TOF-mass spectrometry and molecular approaches. ACTA ACUST UNITED AC 2015; 63:153-7. [PMID: 26300239 DOI: 10.1016/j.patbio.2015.07.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 07/23/2015] [Indexed: 10/23/2022]
Abstract
We evaluated the Bruker Biotyper matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry (MS) for the identification of 97 Corynebacterium clinical in comparison to identification strains by Api Coryne and MALDI-TOF-MS using 16S rRNA gene and hypervariable region of rpoB genes sequencing as a reference method. C. striatum was the predominant species isolated followed by C. amycolatum. There was an agreement between Api Coryne strips and MALDI-TOF-MS identification in 88.65% of cases. MALDI-TOF-MS was unable to differentiate C. aurimucosum from C. minutissimum and C. minutissimum from C. singulare but reliably identify 92 of 97 (94.84%) strains. Two strains remained incompletely identified to the species level by MALDI-TOF-MS and molecular approaches. They belonged to Cellulomonas and Pseudoclavibacter genus. In conclusion, MALDI-TOF-MS is a rapid and reliable method for the identification of Corynebacterium species. However, some limits have been noted and have to be resolved by the application of molecular methods.
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Affiliation(s)
- S Alibi
- UR12/SP34 laboratoire de microbiologie et immunologie, CHU Farhat-Hached, Sousse, Tunisia; Faculté des sciences de Bizerte, université Carthage, Jarzouna Tunisia.
| | - A Ferjani
- UR12/SP34 laboratoire de microbiologie et immunologie, CHU Farhat-Hached, Sousse, Tunisia
| | - O Gaillot
- UR12/SP34 laboratoire de microbiologie et immunologie, CHU Farhat-Hached, Sousse, Tunisia
| | - M Marzouk
- UR12/SP34 laboratoire de microbiologie et immunologie, CHU Farhat-Hached, Sousse, Tunisia
| | - R Courcol
- Institut de microbiologie, centre hospitalier universitaire de Lille, 59037 Lille cedex, France
| | - J Boukadida
- UR12/SP34 laboratoire de microbiologie et immunologie, CHU Farhat-Hached, Sousse, Tunisia
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Azouzi F, Chahed C, Marzouk M, Ferjani A, Hannechi N, Fekih M, Ben Salem Y, Boukadida J. Chorioamnionitis due to Lactococcus lactis cremoris: A case report. Case Rep Womens Health 2015; 7:1-2. [PMID: 29629306 PMCID: PMC5886000 DOI: 10.1016/j.crwh.2015.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 07/16/2015] [Indexed: 12/02/2022] Open
Abstract
Lactococcus lactis cremoris is rarely involved in human pathology. A thirty two-year old pregnant woman with premature rupture of membrane history presented with chorioamnionitis due to L. lactis cremoris. She underwent an emergency caesarian section and was treated with antibiotics including the association of amoxicillin and clavulanic acid. She was completely recovered. This is the first case to our knowledge of chorioamnionitis due to this organism. Lactococcus lactis cremoris is rarely involved in human pathology. A thirty two-year-old pregnant woman had premature rupture of membrane history. She presented with chorioamnionitis due to Lactococcus lactis cremoris. She underwent an emergency caesarian section and was treated with antibiotics. This is the first case to our knowledge of chorioamnionitis due to this germ.
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Affiliation(s)
- F Azouzi
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - C Chahed
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - M Marzouk
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - A Ferjani
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - N Hannechi
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - M Fekih
- Obstetrics and Gynaecology department, CHU Farhat Hached, Sousse, Tunisia
| | - Y Ben Salem
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
| | - J Boukadida
- Microbiology and Immunology Laboratory, UR12SP34, CHU Farhat Hached, Sousse, Tunisia
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Marzouk M, Ferjani A, Haj Ali M, Boukadida J. Profil et sensibilité aux antibiotiques de 1879 bactéries urinaires pathogènes isolées chez l’enfant (2012–2013). Arch Pediatr 2015; 22:505-9. [DOI: 10.1016/j.arcped.2015.02.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/17/2014] [Accepted: 02/23/2015] [Indexed: 11/15/2022]
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Marzouk M, Boukadida A, Chouchene I, Ferjani A, Hannachi N, Besbes M, Bouchoucha S, Boukadida J. Analyse des cas de légionellose grave hospitalisés dans les services de réanimation en Tunisie. ACTA ACUST UNITED AC 2015; 108:191-6. [DOI: 10.1007/s13149-014-0414-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 10/30/2014] [Indexed: 11/29/2022]
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Marzouk M, Ferjani A, Amamou S, Alibi S, Haj Ali M, Boukadida J. Phenotype, genotype, and serotype distribution of macrolide resistant invasive and non-invasive Streptococcus pneumoniae strains, in Sousse, Tunisia. Med Mal Infect 2014; 44:478-82. [DOI: 10.1016/j.medmal.2014.07.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 06/23/2014] [Accepted: 07/28/2014] [Indexed: 10/24/2022]
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Marzouk M, Ferjani A, Bouafia N, Harb H, Ben Salem Y, Boukadida J. Serotype distribution and antimicrobial resistance of invasive and noninvasive pneumococcal isolates in Tunisia. Microb Drug Resist 2014; 21:85-9. [PMID: 25191941 DOI: 10.1089/mdr.2014.0084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pneumococcal conjugate vaccines have not yet been introduced into the national program for childhood vaccination in Tunisia. The aim of this 7-year study was to obtain local data about serotype distribution and antimicrobial resistance of Streptococcus pneumoniae. A total of 203 isolates of culture confirmed that S. pneumoniae was evaluated. Invasive (n=108) and noninvasive (n=95) pneumococcal isolates were obtained from patients aged from 1 month to 85 years old. Considering all age groups, vaccine coverage was 40%, 62%, and 68% for PCV7, PCV10, and PCV13 serotypes, respectively. Overall, 31% of these isolates were penicillin G nonsusceptible. The most prevalent serotypes identified were those found in currently available pneumococcal conjugate vaccines, emphasizing the importance of implementing the vaccine in the routine immunization schedule at the national level.
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Affiliation(s)
- Manel Marzouk
- 1 Laboratory of Microbiology and Immunology, UR12SP34, University Hospital Farhat Hached , Sousse, Tunisia
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Guedda I, Taminiau B, Ferjani A, Boukadida J, Bertrand S, Daube G. Antimicrobial and molecular analysis of Salmonella serovar Livingstone strains isolated from humans in Tunisia and Belgium. J Infect Dev Ctries 2014; 8:973-80. [DOI: 10.3855/jidc.3989] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 01/28/2014] [Accepted: 01/28/2014] [Indexed: 10/31/2022] Open
Abstract
Introduction: Salmonella Livingstone is one of the most common serotypes responsible for nosocomial outbreaks in Tunisia. In this study, 42 isolates of Salmonella Livingstone were analyzed. Most of these were isolated from humans (31 strains from Tunisia and 9 strains from Belgium) and 2 isolates came from food products (beef and pork). Methodology: All strains were characterized by antibiogram, multilocus sequence typing (MLST), and virulotyping. This last technique was carried out by simple PCR of five chromosomal genes (agfA, hin/H2, iroB, phoP/Q, and slyA) and two plasmid genes (spvA and spvC). Results: All Tunisian strains were resistant to amoxicillin, amoxicillin-clavulanic acid, ticarcillin, cefalotin, gentamicin, and kanamycin. They were also resistant to third-generation cephalosporin antibiotics (cefotaxim and ceftazidim). Belgian isolates were susceptible to all antibiotics tested. Further to MLST analyses, Tunisian strains belonged to the same sequence type, ST543. For Belgian isolates, eight strains had a ST543 profile, two strains had a ST638 profile, and one strain had a ST457 profile. Analyses of the virulence gene contents showed that strains isolated in different years and from different origins had the same virulence profile. These carried all five chromosomal genes and lacked plasmid-located virulence genes spvA and spvC. Conclusions: A combination of different typing methods showed that the majority of Belgian strains and all Tunisian strains were closely related; they belonged to the same sequence type (ST543) and had the same virulence profile, but different antibiotic resistance profiles depended on the country of origin.
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Laarif M, Aounallah A, Boussofara L, Limam M, Ferjani A, Saidi W, Denguezli M, Ghariani N, Belajouza C, Nouira R. Profil épidémiologique de la résistance du Staphylocoque aureus en milieu hospitalier dermatologique. Ann Dermatol Venereol 2013. [DOI: 10.1016/j.annder.2013.09.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ferjani A, Marzouk M, Saghrouni F, Hadj Ali M, Boukadida J. Antimicrobial susceptibility and genotypic distribution of Neisseria gonorrhoeae: A 2-year study in Tunisia. Med Mal Infect 2013; 43:211-2. [DOI: 10.1016/j.medmal.2013.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 12/20/2012] [Accepted: 02/05/2013] [Indexed: 10/26/2022]
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Hannachi N, Ben Fredj N, Samoud S, Ferjani A, Khlif A, Boughammoura L, Soussi S, Aouni M, Skouri H, Boukadida J. [Seroprevalence and risk factors of human herpes virus 8 infection in Central-East Tunisia]. ACTA ACUST UNITED AC 2011; 60:282-6. [PMID: 22115818 DOI: 10.1016/j.patbio.2011.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Accepted: 10/14/2011] [Indexed: 10/15/2022]
Abstract
OBJECTIVE Epidemiology of human herpesvirus 8 (HHV8) is still unknown in Tunisia. We aimed to assess the prevalence of HHV8 infection in adults and children from Central-East Tunisia and in patients with high risk of parenteral or sexual infection. METHODS We enrolled 553 subjects: 116 blood donors, 100 pregnant women, 100 children, 50 subjects with sexually transmitted infections with positive HIV serology and 50 other without HIV infection, 107 multitransfused patients and 30 kidney transplant patients. Antibodies against HHV8 were tested using a sensitive indirect immunofluorescence assay. RESULTS The seroprevalence of HHV8 was found to be 13.8% in blood donors, 13% in pregnant women and 12% in children. In healthy adult population, no association was found between HHV8 seropositivity and sex, sociodemographic characteristics, parenteral risk factors or serological markers of hepatitis B. Rates of HHV8 infection were significantly higher in patients having high-risk sexual behavior with or without HIV infection (P<10(-4)), in polytransfused patients (P<10(-4)) and in patients with kidney transplantation (P=0.001). CONCLUSION Our findings suggest that HHV8 infection is widespread in Central-East Tunisia such as in the Mediterranean area. HHV8 infection appears to be acquired early in life, probably through saliva. HHV8 transmission by blood transfusion, subject of controversy in literature, is well established in our study. Early screening of this infection should be considered in populations with high risk of Kaposi's sarcoma in our areas.
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Affiliation(s)
- N Hannachi
- Laboratoire de microbiologie-immunologie, UR02SP13, CHU Farhat Hached, avenue Ibn Jazzar, 4000 Sousse, Tunisie.
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Hannachi N, Marzouk M, Harrabi I, Ferjani A, Ksouri Z, Ghannem H, Khairi H, Hidar S, Boukadida J. Séroépidémiologie de la rubéole, de la varicelle et des infections par le cytomégalovirus et le parvovirus B19 chez les femmes enceintes dans la région de Sousse, Tunisie. ACTA ACUST UNITED AC 2011; 104:62-7. [DOI: 10.1007/s13149-010-0119-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Accepted: 10/12/2010] [Indexed: 11/28/2022]
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Ferjani A, Mkaddemi H, Tilouche S, Marzouk M, Hannechi N, Boughammoura L, Boukadida J. [Epidemiological and bacteriological characteristics of uropathogen bacteria isolated in a pediatric environment]. Arch Pediatr 2010; 18:230-4. [PMID: 21111582 DOI: 10.1016/j.arcped.2010.09.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 09/03/2010] [Accepted: 09/30/2010] [Indexed: 11/26/2022]
Abstract
Urinary tract infection (UTI) in children is a grave pathology, which requires a fast and effective care. Bacteriological and epidemiological data play a determining role in patient's care. We report a retrospective study, which spreads out from January 1st till August 31st, 2009, having concerned hospitalized children for urinary infection in pediatrics service of Farhat Hached teaching hospital in Sousse. Our series contained 51 children with a sex ratio of 0.76, an average age of 32 months. The majority of cases was pyelonephritis (94.1%). A pathology is associated with the urinary infection in 41.2%. Three cases of vesico-ureteral reflux were noted. The diagnosis of urinary infection was confirmed by cytobacteriological exam of urine (CBEU). Enterobacteriacea were isolated in 96.1%. Escherichia coli remains the most often isolated (80.4%), followed by Klebsiella pneumoniae (9.8%) then by Proteus mirabilis (5.9%). E. coli was resistant to amoxicillin in 78% of cases, to the association amoxicillin-clavulanic acid in 64,8%, to cephalosporins of 3(rd) generation (C3G) in 5% and to cotrimoxazole in 51%. No K. pneumoniae or P. mirabilis strain was resistant to C3G. UTI in children is always an indication for CBEU realization at first intention. The results of this exam are very important considering the diversity of the responsible bacteria and the growing frequency of acquired antibiotic resistance.
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Affiliation(s)
- A Ferjani
- Laboratoire de microbiologie et d'immunologie UR02SP13, CHU Farhat Hached, Sousse, Tunisie.
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Hannachi N, Fredj NB, Bahri O, Thibault V, Ferjani A, Gharbi J, Triki H, Boukadida J. Molecular analysis of HBV genotypes and subgenotypes in the Central-East region of Tunisia. Virol J 2010; 7:302. [PMID: 21050489 PMCID: PMC2989323 DOI: 10.1186/1743-422x-7-302] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Accepted: 11/04/2010] [Indexed: 12/17/2022] Open
Abstract
Background In Tunisia, country of intermediate endemicity for Hepatitis B virus (HBV) infection, most molecular studies on the virus have been carried out in the North of the country and little is known about other regions. The aim of this study was to determine HBV genotype and subgenotypes in Central-East Tunisia. A total of 217 HBs antigen positive patients were enrolled and determination of genotype was investigated in 130 patients with detectable HBV DNA. HBV genotyping methods were: PCR-RFLP on the pre-S region, a PCR using type-specific primers in the S region (TSP-PCR) and partial sequencing in the pre-S region. Results Three genotypes (D, B and A) were detected by the PCR-RFLP method and two (D and A) with the TSP-PCR method, the concordance between the two methods was 93%. Sequencing and phylogenetic analysis of 32 strains, retrieved the same genotype (D and A) for samples with concordant results and genotype D for samples with discordant results. The sequences of discordant genotypes had a restriction site in the pre-S gene which led to erroneous result by the PCR-RFLP method. Thus, prevalence of genotype D and A was 96% and 4%, respectively. Phylogenetic analysis showed the predominance of two subgenotypes D1 (55%) and D7 (41%). Only one strain clustered with D3 subgenotype (3%). Conclusions Predominance of subgenotype D7 appears to occur in northern regions of Africa with transition to subgenotype D1 in the East of the continent. HBV genetic variability may lead to wrong results in rapid genotyping methods and sequence analysis is needed to clarify atypical results.
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Affiliation(s)
- Naila Hannachi
- Laboratoire de Microbiologie-Immunologie, UR02SP13, Hôpital Farhat Hached, Sousse, Tunisia.
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Ferjani A, Marzouk M, Ben Moussa F, Boukadida J. Résistance des souches d’Escherichia coli isolées de prélèvements d’origine urinaire vis-à-vis de l’association amoxicilline–acide clavulanique et divers antibiotiques. Med Mal Infect 2010; 40:161-4. [DOI: 10.1016/j.medmal.2009.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Accepted: 06/04/2009] [Indexed: 10/20/2022]
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Ferjani A, Ben Abdallah H, Ben Saida N, Gozzi C, Boukadida J. [Vaginal colonization of the Streptococcus agalactiae in pregnant woman in Tunisia: risk factors and susceptibility of isolates to antibiotics]. Bull Soc Pathol Exot 2006; 99:99-102. [PMID: 16821439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Streptococcus agalactiae or Group B Streptococcus (GBS) is one of the main bacterial causes of serious infections in newborns. We have evaluated prospectively GBS vaginal colonization in pregnant women and we have tried to determine the risk factors of the colonization by GBS and the particularities of the different isolated strains. We have screened 300 pregnant women with vaginal and anal sample in a same swab. Thirty nine (13%) pregnant women are colonized by SGB, 0% in the first trimester, 10.2% in the second trimester and 17% in the third trimester. Different factors are associated significantly with GBS colonization: past history of infection in newborns, genital infection during pregnancy and parity The highest rates of resistance are found in tetracycline (97.4%), erythromycin (51.3%) and lincomycin (46.2%). All the strains were susceptible to amoxicilin and pristinamycin.
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Affiliation(s)
- A Ferjani
- Laboratoire de miaobiologie et d'immunologie, UR 16/02, CHU F. Hached, Sousse 4001, Tunisie
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Toumi A, Ferjani A, Ben Abdallah H, Boukadida J. [Streptococcus agalactiae in nonpregnant adults]. Tunis Med 2006; 84:161-4. [PMID: 16755956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
UNLABELLED The pathogenic capacity of streptococcus agalactiae or Group B Streptococcus (GBS) has been increasing in nonpregnant adults. We carried out a study about the pathogenic capacity and susceptibility to antibiotics of GBS strains isolated between January 2003 and June 2004 in Farhat Hached hospital of Sousse (Tunisian general hospital). METHODS Identification of strains was carried out according to usual bacteriological characters. Susceptibility of GBS to antibiotics was carried out according to CA-SFM recommendations. RESULTS during the study period, sixty strains were isolated. They were essentially isolated from the urinary tract (52%) and the skin (36.2%). Women accounted for 68 percent of the cases. Among the 30 hospitalized patients, 20 (66%) had serious underlying disease. Diabetes mellitus was predominant (80%). All group B streptococci isolates were susceptible to amoxicillin, penicillin G, vancomycin and to pristinamycin. Sixty four percent of isolates were susceptible to erythromycin. Among the invasive infection, caused by GBS in nonpregnant adults, skin and urinary tract infections were the most common. All isolates were susceptible to amoxicillin, penicillin G. vancomycin and to pristinamycin.
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Affiliation(s)
- Adnène Toumi
- Laboratoire de Microbiologie, CHU Farhat Hached Sousse, Tunisie
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Mohanty A, Kathuria H, Ferjani A, Sakamoto A, Mohanty P, Murata N, Tyagi AK. Transgenics of an elite indica rice variety Pusa Basmati 1 harbouring the codA gene are highly tolerant to salt stress. Theor Appl Genet 2002; 106:51-7. [PMID: 12582870 DOI: 10.1007/s00122-002-1063-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2002] [Accepted: 03/28/2002] [Indexed: 05/23/2023]
Abstract
Transgenic lines of indica rice were generated by Agrobacterium-mediated transformation with the choline oxidase ( codA) gene from Arthrobacter globiformis. Choline oxidase catalyses conversion of choline to glycine betaine. Glycine betaine is known to provide tolerance against a variety of stresses. Molecular analyses of seven independent transgenic lines as performed by Southern, Northern and Western hybridization revealed integration and expression of the transgene as well as inheritance in the progeny plants. A good correlation was observed between levels of mRNA and protein accumulation, and a significant amount of choline oxidase product, i.e. glycine betaine, accumulated in R0 as well as R1 plants. Mendelian as well as non-Mendelian segregation patterns were obtained in the progeny plants. Challenge studies performed with R1 plants by exposure to salt stress (0.15 M NaCl) for 1 week, followed by a recovery period, revealed that in some cases more than 50% of the transgenic plants could survive salt stress and set seed whereas wild-type plants failed to recover.
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Affiliation(s)
- A Mohanty
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi-110021, India
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Ferjani A, Abe S, Ishikawa Y, Henmi T, Nishi Y, Tamura N, Yamamoto Y. Characterization of the stromal protease(s) degrading the cross-linked products of the D1 protein generated by photoinhibition of photosystem II. Biochim Biophys Acta 2001; 1503:385-95. [PMID: 11115650 DOI: 10.1016/s0005-2728(00)00233-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
When photosystem (PS) II-enriched membranes are exposed to strong light, cross-linking of the intrinsic D1 protein with the surrounding polypeptides and degradation of the D1 protein take place. The cross-linking of the D1 protein with the alpha-subunit of cytochrome b(559) is suggested to be an early event of photoinduced damage to the D1 protein (Barbato et al., FEBS Lett. 309 (1992) 165-169). The relationship between the cross-linking and the degradation of the D1 protein, however, is not yet clear. In the present study, we show that the addition of stromal extract from chloroplasts degrades the 41 kDa cross-linked product of D1/cytochrome b(559) alpha-subunit and enhances the degradation of the D1 protein. Incubation of the preilluminated PS II-enriched membranes with the stromal extract at 25 degrees C causes the degradation of the cross-linked product by more than 70%. The activity of the stromal extract showed a pH optimum at 8.0, and was enhanced by the addition of ATP or GTP. Consistent with the nucleotide effect, this stromal activity was eliminated by the preincubation of the stromal extract with apyrase, which hydrolyzes nucleotides. Also, the stromal activity was nearly fully inhibited by a serine-type protease inhibitor, 3,4-dichloroisocoumarin, which suggests participation of a serine-type protease(s).
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Affiliation(s)
- A Ferjani
- Department of Biology, Faculty of Science, Okayama University, Japan
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Ishikawa Y, Nakatani E, Henmi T, Ferjani A, Harada Y, Tamura N, Yamamoto Y. Turnover of the aggregates and cross-linked products of the D1 protein generated by acceptor-side photoinhibition of photosystem II. Biochim Biophys Acta 1999; 1413:147-58. [PMID: 10556627 DOI: 10.1016/s0005-2728(99)00093-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
It is known that the reaction-center binding protein D1 in photosystem (PS) II is degraded significantly during photoinhibition. The D1 protein also cross-links covalently or aggregates non-covalently with the nearby polypeptides in PS II complexes by illumination. In the present study, we detected the adducts between the D1 protein and the other reaction-center binding protein D2 (D1/D2), the alpha-subunit of cyt b(559) (D1/cyt b(559)), and the antenna chlorophyll-binding protein CP43 (D1/CP43) by SDS/urea-polyacrylamide gel electrophoresis and Western blotting with specific antibodies. The adducts were observed by weak and strong illumination (light intensity: 50-5000 microE m(-2) s(-1)) of PS II membranes, thylakoids and intact chloroplasts from spinach, under aerobic conditions. These results indicate that the cross-linking or aggregation of the D1 protein is a general phenomenon which occurs in vivo as well as in vitro with photodamaged D1 proteins. We found that the formation of the D1/D2, D1/cyt b(559) and D1/CP43 adducts is differently dependent on the light intensity; the D1/D2 heterodimers and D1/cyt b(559) were formed even by illumination with weak light, whereas generation of the D1/CP43 aggregates required strong illumination. We also detected that these D1 adducts were efficiently removed by the addition of stromal components, which may contain proteases, molecular chaperones and the associated proteins. By two-dimensional SDS/urea-polyacrylamide gel electrophoresis, we found that several stromal proteins, including a 15-kDa protein are effective in removing the D1/CP43 aggregates, and that their activity is resistant to SDS.
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Affiliation(s)
- Y Ishikawa
- Department of Biology, Faculty of Science, Okayama University, Okayama, Japan
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