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Related Concept Videos

Viral Mutations00:36

Viral Mutations

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A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
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Pneumonia III: Complications and Assessment01:30

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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Related Experiment Video

Updated: May 15, 2025

The Development of Lyophilized Loop-mediated Isothermal Amplification Reagents for the Detection of Coxiella burnetii
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The Development of Lyophilized Loop-mediated Isothermal Amplification Reagents for the Detection of Coxiella burnetii

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[Q Fever: what's new?]

Axel Minder1, Eleftheria Kampouri1, Noémie Boillat-Blanco1

  • 1Service des maladies infectieuses, Département de médecine, Centre hospitalier universitaire vaudois, 1011 Lausanne.

Revue Medicale Suisse
|April 10, 2025
PubMed
Summary
This summary is machine-generated.

Q fever, caused by Coxiella burnetii, is a zoonotic disease transmitted from animals like sheep and goats. Diagnosis involves serology or PCR, with doxycycline and hydroxychloroquine as primary treatments.

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Applying Fluorescence Resonance Energy Transfer FRET to Examine Effector Translocation Efficiency by Coxiella burnetii during siRNA Silencing
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Area of Science:

  • Bacteriology: Focuses on Coxiella burnetii, the Gram-negative intracellular bacterium responsible for Q fever.
  • Zoonotic Diseases: Investigates the transmission of Q fever from animal reservoirs to humans.

Context:

  • Q fever is a zoonosis primarily associated with sheep and goats.
  • Transmission occurs via aerosols, wind, or contaminated milk and dairy products.

Purpose:

  • To provide a comprehensive overview of Q fever, its causative agent, transmission, clinical manifestations, diagnosis, and treatment.
  • To highlight the diverse presentations of acute and chronic Q fever, including potential autoimmune complications.

Summary:

  • Coxiella burnetii causes Q fever, presenting acutely as flu-like illness, pneumonia, or hepatitis, or chronically with endocarditis, hepatitis, or osteoarticular issues.
  • Diagnosis relies on serology and PCR, with doxycycline and hydroxychloroquine being the recommended treatments, especially for chronic or disseminated infections.

Impact:

  • Enhances understanding of Q fever's multifaceted nature, aiding clinicians in diagnosis and management.
  • Emphasizes the importance of early detection and appropriate treatment to prevent severe complications and autoimmune sequelae.