Extended-spectrum beta-lactamase- and carbapenemase-producing isolates causing hospital- and community-acquired infections in Tunisia (2001-2019): expansion of CTX-M-15-C2 and CTX-M-27-C1 ST131 subclades.

Unlabelled: The prevalence of infections caused by extended-spectrum beta-lactamase (ESBL)-producing (ESBL-EC) and carbapenemase-producing (CP-EC) is increasing worldwide. We investigated the epidemiology of ESBL-EC and CP-EC causing hospital-acquired (HA) infections in a large teaching hospital in Tunisia over the last two decades and compared it with a collection of 107 community-acquired (CA) ESBL-EC isolates. Between 2001 and 2019, the incidence of HA ESBL-EC increased significantly from 0.

Nasopharyngeal Carriage of in Tunisian Healthy under-Five Children during a Three-Year Survey Period (2020 to 2022).

We aimed to assess the prevalence of nasopharyngeal pneumococcal carriage and to determine serotype distribution, antibiotic susceptibility patterns, and evolutionary dynamics of isolates in healthy under-five children. Nasopharyngeal swabs were collected from healthy children over three survey periods between 2020 and 2022. All pneumococcal isolates were serotyped and tested for antimicrobial susceptibility.

Group B and Perinatality in the South of Tunisia: Epidemiology, Serotype Distribution, and Antibiotic Susceptibility.

Introduction: In the lack of updated Tunisian epidemiological data, we sought to describe the epidemiology of Group B (GBS) in pregnant women and newborns.

Materials And Methods: A retrospective analysis of GBS neonatal invasive infections and a cross-sectional study evaluating the prevalence of maternal GBS colonization were conducted. GBS isolates were tested for antimicrobial susceptibility, serotyped, and assessed for the appurtenance to the hypervirulent ST17 clone.

Relationship Between Serotypes and Antimicrobial Nonsusceptibility of Clinical Isolates in Tunisia.

remains a significant cause of morbidity and mortality worldwide despite the overall success of the vaccine programs. In Tunisia, pneumococcal conjugate vaccines (PCV)10 was introduced in the national immunization program in April 2019. We sought to determine the relationship between serotypes and antimicrobial nonsusceptibility of isolates recovered from clinical samples in the prevaccination period in the south of Tunisia.

Molecular epidemiology of extended-spectrum beta-lactamase-producing Escherichia coli in Tunisia and characterization of their virulence factors and plasmid addiction systems.

Background: Extended-spectrum β-lactamases (ESBLs), particularly CTX-M- type ESBLs, are among the most important resistance determinants spreading worldwide in Enterobacteriaceae. The aim of this study was to characterize a collection of 163 ESBL-producing Escherichia coli collected in Tunisia, their ESBL-encoding plasmids and plasmid associated addiction systems.

Results: The collection comprised 163 ESBL producers collected from two university hospitals of Sfax between 1989 and 2009.

[Investigation of three nosocomial outbreaks of Serratia marcescens in an intensive care unit in Sfax-Tunisia].

Unlabelled: THE AIM of the study was to type Serratia marcescens responsible for nosocomial outbreaks in an intensive care unit in Sfax -Tunisia.

Methods: The relatedness between S. marcescens isolates was studied by Pulsed field gel electrophoresis (PFGE).

[Pseudomonas aeruginosa: a multicentric study of antibiotic resistance (1999-2000)].

A retrospective multicentric study was carried out over a period of 2 years (1999-2000). 2659 strains of Pseudomonas aeruginosa were collected from 4 university hospitals (Charles Nicolle Hospital, Pediatric Hospital and National Centre of Bone Marrow Transplantation in Tunis, Habib Bourguiba Hospital in Sfax). Epidemiological profile and antibiotic susceptibility were analysed.

[Antibiotic resistance among E. coli isolates from urinary tract infections (1999-2000): a multicenter study].

E. coli is the most frequently isolate species in community as well as in nosocomial acquired urinary tract infections (UTI). Trimethoprim-sulfamethoxazole (TMP-SMX), is commonly used as empiric treatment for managing uncomplicated UTI whereas the rate of resistance to amoxicilline is increasing.

[Enterococcus faecalis: a multicenter study on antibiotic resistance].

676 E. faecalis strains were listed over a period of 2 years from the Charles Nicolle hospital of Tunis (167 strains), the Habib Bourguiba hospital of Sfax (350 strains) and the National Centre of Bone marrow Transplantation of Tunis (159 strains). Antibiotic sensibility study was realized by the method of the antibiogram, E-test method and the search of penicillinase by cefinase.

[Epidemiologic profile of Haemophilus influenzae infection in Tunisia].

Haemophilus influenzae, a commensal bacteria, is frequently incriminated in broncho--pulmonary surinfections and severe diseases as meningitis, pneumonia and septic arthritis, particularly in young children. A multicenter study was conducted to establish the epidemiological profile of Haemophilus influenzae diseases, to determine the rate of antibiotics resistance for guide therapeutic and preventive strategies. The identification was based on the requirements for X and V factors, and the serotype b determined by agglutination.

[Multidrug resistance in Klebsiella pneumoniae: multicenter study].

The extensive use of broad spectrum antibiotics, especially the third generation cephalosporins (C3G), was followed by the emergence of newer plasmid mediated betalactamases called extended spectrum betalactamases (ESBLs). To assess the impact of K. pneumoniae resistant to 3GC in Tunisia, this study was conducted in 3 teaching hospitals.