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Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

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Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
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Acute Pharyngitis01:30

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Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
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Acute pharyngitis can be categorized based on its underlying cause:
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The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...
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Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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Bacterial Phylum Chlamydiae01:29

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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...
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Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
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Nontyphoidal

John A Crump1, Tonney S Nyirenda2, Lisette Mbuyi Kalonji3,4

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This summary is machine-generated.

Nontyphoidal Salmonella causes significant invasive disease and deaths, particularly in sub-Saharan Africa. Developing vaccines and non-vaccine interventions is crucial for control.

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Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Nontyphoidal Salmonella (NTS) is a major cause of invasive disease and mortality in sub-Saharan Africa.
  • NTS invasive disease disproportionately affects sub-Saharan Africa, accounting for a high percentage of global illnesses and deaths.
  • Specific lineages, Salmonella enterica serovar Typhimurium ST 313 and Salmonella enterica serovar Enteritidis ST11, are dominant causes of invasive disease.

Purpose of the Study:

  • To highlight the significant burden of NTS invasive disease in sub-Saharan Africa.
  • To discuss the challenges posed by antimicrobial resistance in NTS infections.
  • To review current and developing interventions, including vaccines, for NTS disease control.

Main Methods:

  • Epidemiological data analysis to estimate NTS invasive disease burden.
  • Review of antimicrobial resistance patterns in NTS strains.
  • Assessment of immunological responses and vaccine development status.

Main Results:

  • An estimated 535,000 NTS invasive disease illnesses and 77,500 deaths occurred globally in 2017, with 78.9% of illnesses and 85.9% of deaths in sub-Saharan Africa.
  • The case-fatality ratio for NTS invasive disease is approximately 15%, exacerbated by rising antimicrobial resistance.
  • Naturally acquired immunity develops in children over 3 years old, involving T-cell and antibody responses.

Conclusions:

  • NTS invasive disease represents a critical public health challenge in sub-Saharan Africa, necessitating urgent interventions.
  • Increasing antimicrobial resistance threatens patient outcomes, underscoring the need for effective treatments and prevention strategies.
  • A combination of vaccine use and non-vaccine interventions is essential for controlling NTS invasive disease.