Related Experiment Video

Updated: Feb 7, 2026

Studying Oxidative Stress Caused by the Mitis Group Streptococci in Caenorhabditis elegans
09:36

Studying Oxidative Stress Caused by the Mitis Group Streptococci in Caenorhabditis elegans

Published on: March 23, 2019

7.6K

A Case of Recurrent Erysipelas Caused by Streptococcus mitis Group

David Nygren1, Bo Nilson2,3, Magnus Rasmussen1

  • 1Division of Infection Medicine, Department for Clinical Sciences Lund, Medical Faculty, Lund University, Lund, Sweden.

Case Reports in Infectious Diseases
|July 19, 2018
PubMed

Insights

Recurrent erysipelas in a patient with lymphoedema was linked to Streptococcus mitis group bacteria. This study reports Streptococcus mitis and Streptococcus oralis as novel causes of erysipelas.

Area of Science:

  • Infectious Diseases
  • Microbiology

Background:

  • Erysipelas etiology is often unclear, with beta-hemolytic streptococci typically implicated.
  • Patient history includes lymphoedema of the left arm post-breast cancer surgery and lymph node dissection.

Observation:

  • A 70-year-old woman experienced recurrent erysipelas on her left arm over a decade.
  • Seven distinct erysipelas episodes were documented, with three concurrent cases of Streptococcus mitis group bacteremia.

Findings:

  • This case series identifies Streptococcus mitis and Streptococcus oralis as causative agents of erysipelas.
  • These findings represent the first reported instances of these specific bacteria causing erysipelas.

Implications:

  • Expands the known spectrum of pathogens responsible for erysipelas.
  • Highlights the importance of considering non-beta-hemolytic streptococci in recurrent or atypical erysipelas cases, especially in immunocompromised or lymphoedematous patients.

More Related Videos

Purification of a High Molecular Mass Protein in Streptococcus mutans09:51

Purification of a High Molecular Mass Protein in Streptococcus mutans

Published on: September 14, 2019

6.3K
Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection07:06

Fecal Microbiota Transplantation via Colonoscopy for Recurrent C. difficile Infection

Published on: December 8, 2014

27.7K

Related Concept Videos

Tonicity in Animals00:59

Tonicity in Animals

The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane for different solutes and the concentration of nonpenetrating solutes in the solution within and outside of the cell. If a semipermeable membrane hinders the passage of some solutes but allows water to follow its concentration gradient, water moves from the side with low osmolarity (i.e., less solute) to the side with higher osmolarity (i.e.,...
125.1K
Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
57.3K
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
27.1K
Keystone Species01:39

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
24.9K
Base Excision Repair01:54

Base Excision Repair

One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
26.4K
Overview of DNA Repair02:25

Overview of DNA Repair

In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
33.8K