The emergence of multidrug resistance to antimicrobial agents for the treatment of typhoid fever.

Trans R Soc Trop Med Hyg

Centre for Molecular Microbiology and Infection, Level 3, Flowers Building, Imperial College, South Kensington, London SW7 2AZ, UK.

Published: July 2004

Resistance to chloramphenicol was reported in Salmonella Typhi in 1950 but it was not until 22 years later that the first outbreaks of chloramphenicol-resistant typhoid fever occurred. Multidrug-resistant (MDR) Salmonella Typhi emerged in the 1980s and today has an almost worldwide distribution. Genome analysis of Salmonella Typhi strain CT18, an MDR isolate from a patient admitted to The Centre for Tropical Diseases, Ho Chi Minh City, Viet Nam, in December 1993 revealed that the resistance plasmid pHCM1 is very closely related to plasmid R27 which was first isolated in 1961. There is a core region shared by the two plasmids with five regions of variation. Two of these regions contain the genes encoding resistance. The largest region is 34.955 kbp in length, is bordered by two almost identical IS10 elements and contains several integron-like structures including a truncated Tn10 element. The second region is 14.75I kbp and encodes a trimethoprim-resistance gene, dfrA14, associated with a class one integrase. Restriction enzyme analysis has shown that the variation in Salmonella Typhi plasmids, collected during the emergence of resistant Salmonella Typhi in Viet Nam, maps to five variable regions. These regions appear to be hot spots for DNA acquisition in IncHI1 plasmids.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.trstmh.2003.10.015DOI Listing

Publication Analysis

Top Keywords

salmonella typhi
20
typhoid fever
8
viet nam
8
salmonella
5
typhi
5
emergence multidrug
4
resistance
4
multidrug resistance
4
resistance antimicrobial
4
antimicrobial agents
4

Similar Publications

Physicochemical Characterization of Gallstone Surfaces to Predict Their Interaction with Salmonella Typhi.

Curr Microbiol

January 2025

Industrial and Surface Engineering Laboratory, Bioprocess and Biointerfaces Team, Department of Life Sciences, Faculty of Sciences and Techniques, Sultan Moulay Slimane University, BP 523, 23000, Beni Mellal, Morocco.

Salmonella Typhi can adhere to and build biofilms on the surface of gallstones causing abnormal gallbladder mucosa, which could lead to carcinogenesis. The surface physicochemical properties of microbial cells and materials have been shown to play a crucial role in adhesion. Therefore, the purpose of this study was to investigate, for the first time, the surface properties of nine gallstones and to evaluate the influence of these parameters on the theoretical adhesion of S.

View Article and Find Full Text PDF

Background: Enteric fever caused by Salmonella enterica serovars Typhi and Paratyphi A in addition to gastroenteritis and invasive disease, predominantly attributable to nontyphoidal Salmonella serovars Typhimurium and Enteritidis, are major causes of death and disability across the globe. A broad-spectrum vaccine that protects against disease caused by typhoidal and nontyphoidal serovars of Salmonella is not available for humans but would prevent a considerable burden of disease worldwide.

Methods: We previously developed a broad-spectrum vaccine for Gram-negative bacteria that is based on the inner core domain of detoxified Escherichia coli O111, Rc (J5) mutant lipooligosaccharide, a highly conserved antigen across Gram-negative bacteria, complexed with an outer membrane protein of group B Neisseria meningitidis.

View Article and Find Full Text PDF

Vi capsular polysaccharide of Salmonella enterica serovar Typhi disturbs autophagy to increase intracellular survival in macrophages.

Microb Pathog

December 2024

Department of Laboratory Medicine, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu 212001, China. Electronic address:

The autophagy pathway plays a crucial role in resistance to bacterial infection in the host. Salmonella enterica serovar Typhi (S. Typhi), a human restricted pathogen, causes a systemic infection known as typhoid fever.

View Article and Find Full Text PDF

Unlabelled: The ability to treat infections is threatened by the rapid emergence of antibiotic resistance among pathogenic microbes. Therefore, new antimicrobials are needed. Here we evaluate mannitol-1-phosphate 5-dehydrogenase (MtlD) as a potential new drug target.

View Article and Find Full Text PDF

Introduction: Typhoid fever is an infectious disease primarily caused by sv. Typhi ( Typhi), a bacterium that causes as many as 20 million infections and 600,000 deaths annually. Asymptomatic chronic carriers of S.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!