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Related Concept Videos

Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic of...
Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
Rheumatic Heart Disease I: Introduction01:23

Rheumatic Heart Disease I: Introduction

Rheumatic heart disease or RHD is a chronic condition that results from rheumatic fever, causing permanent damage to the heart valves.Etiology and Risk FactorsIt primarily arises from rheumatic fever, an inflammatory disease that can develop after untreated or inadequately treated group A streptococcal (GAS) pharyngitis. Streptococcus spreads through direct contact with oral or respiratory secretions. While the bacteria are the causative agents, factors like malnutrition, overcrowding, poor...
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies01:22

Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies

The key clinical manifestations of Rheumatic heart disease (RHD) include several distinct cardiac symptoms.Carditis, a hallmark of acute rheumatic fever, involves inflammation of the heart's endocardium, myocardium, and pericardium. Chronic RHD often results from recurrent episodes of carditis. Its symptoms include the following:Murmurs are caused by valvular damage, especially to the mitral and aortic valves. Mitral stenosis or regurgitation is common, with characteristic heart murmurs...
Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...

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An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines
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An Electroporation Method to Transform Rickettsia spp. with a Fluorescent Protein-Expressing Shuttle Vector in Tick Cell Lines

Published on: October 11, 2022

Rickettsial diseases.

Sanjay K Mahajan1

  • 1Department of Medicine, Indira Gandhi Medical Collge, Shimla 171 001, Himachal Pradesh.

The Journal of the Association of Physicians of India
|February 15, 2013
PubMed
Summary
This summary is machine-generated.

Rickettsial diseases, including emerging tick-borne illnesses, pose a significant global health threat. Improved diagnostics and clinical awareness are crucial for accurate diagnosis and management of these reemerging infections.

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Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing
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Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing
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Tick Microbiome Characterization by Next-Generation 16S rRNA Amplicon Sequencing

Published on: August 25, 2018

Area of Science:

  • Microbiology and Infectious Diseases
  • Public Health
  • Vector-borne Illnesses

Background:

  • Rickettsiae are a diverse group of bacteria, not a homogenous group, transmitted via mammals and arthropod vectors.
  • Rickettsioses, including Q fever, tickborne lymphadenopathy (TIBOLA), and DEBONEL, represent significant public health concerns.
  • The global impact of rickettsial diseases on human health and productivity remains largely unquantified but is suspected to be substantial.

Purpose of the Study:

  • To highlight the reemergence of rickettsial diseases in India, documented across at least eleven states.
  • To emphasize the challenges in diagnosing rickettsial diseases due to a lack of adequate diagnostic tools.
  • To advocate for increased clinical awareness and improved utilization of diagnostic methods for rickettsioses.

Main Methods:

  • Review of existing literature and documentation of rickettsial disease presence.
  • Analysis of diagnostic challenges and limitations in clinical settings.
  • Emphasis on clinical observation and the need for enhanced diagnostic capabilities.

Main Results:

  • Rickettsial diseases, previously thought to have disappeared, are reemerging in India.
  • New rickettsial diseases, such as TIBOLA and DEBONEL, have been identified.
  • A significant number of rickettsial disease cases remain undiagnosed due to diagnostic limitations.

Conclusions:

  • Rickettsial diseases represent a growing and reemerging public health issue globally and in India.
  • Enhanced clinical awareness and improved diagnostic tools are essential for timely and accurate diagnosis of rickettsioses.
  • Addressing diagnostic gaps is critical to understanding and managing the true burden of these infections.