Usage of antibiotics in healthcare In the presence of antibiotics, minor resistant bacterial populations have a selective growth advantage and proliferate while the others die out. Inappropriate use or misuse …
Mixed mechanisms Resistance genes can be mobilized within or between bacterial cells using a combination of mechanisms previously explained. A particular resistance gene can be flanked by a transposon allowing …
Overview In addition to the intrinsic mechanisms of resistance, bacterial pathogens can acquire genes and mutations that mediate resistance to antibiotics. In some cases, bacteria may acquire multiple mechanisms of …
Overview Intrinsic resistance is when a bacterial species is naturally resistant to a certain antibiotic or family of antibiotics, without the need for mutation or gain of further genes. This …
You have a bacterial infection and are prescribed an antibiotic by a doctor. Within a few days you begin to feel better. But how do antibiotics work? In broad terms …
Antibiotics – the basics You may have heard both the terms “antimicrobial” and “antibiotic”. Although often used interchangeably, they actually have distinct meanings: Antimicrobial: is any substance that kills or …
When comparing the phenotypic drug susceptibility results to the genomic determinants identified, there could be some cases with discrepancies. These can occur because of the following reasons: 1. Phenotype sensitive …
Principles of the procedure The aim of this procedure is to determine if bacteria are susceptible or resistant to a range of different antibiotics. This is done by plating a …
In this video, Dr. Estée Török talks about her work on translating microbial sequencing from a research tool into clinical practise. Her particular interest is the antimicrobial resistance and health …
Introduction to recent Cholera epidemics Cholera is an acute diarrhoeal disease caused by ingesting food or water contaminated with the bacterium Vibrio cholerae. Some people develop water diarrhoea with severe …
What are phylogenetic trees? A phylogeny, also known as phylogenetic tree, depicts estimated evolutionary relationships between taxa – these can be species, strains or even genes. In the context of …
In this video, you will learn how to use Microreact, a free web tool developed by the Centre for Genomic Pathogen Surveillance at the Wellcome Genome Campus.
In the step to follow, we will use ACT to analyse a representative Salmonella Typhi genome (labelled as BL0006) of the extensively drug resistant (XDR) Typhoid outbreak you have been …
Your learning You will learn by watching videos, reading articles and publications, doing exercises, checking your understanding in the quizzes and the final test, and through discussion with other learners. …